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Topic 4: Computer Networks

Cassie Xayaseng computer informations Englisch 200 Karten

In the big picture of IT, hardware, software, and users combine to create computer networks.

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  1. 1a collection of computers and computer resources (e.g., printers, file servers) connected in such a way that the computers can communicate with each other and their resourcescomputer network
  2. 2—In the big picture of IT, hardware, software, and users combine to create computer networks.In the big picture of IT, hardware, software, and users combine to create computer networks.
  3. 3the computer that the user is using. That is, the user is physically present with that computer.local computer
  4. 4a computer being accessed over the network. For instance, using a remote desktop connection or telnet [or ssh (secure shell)], you can log in to another computer. The computer you are logging into is referred to as the remote computer.remote computer
  5. 5Computer networks can be viewed at aphysical level (the connections or physical media over which communication is possible), a logical level (network topology), or a software level (the protocols and programs that allow the computers to communicate).
  6. 6characteristics of a computer networkcomputers and other devices are connected and can communicate ,
    provides individuals with the ability to share data, documents, and hardware (e.g. printers, file servers) ,
    A network may use the cloud to store information, but this is not the only way in which information can be stored within the network
  7. 7define networkA computer network is a collection of computers and computer resources (e.g., printers, file servers) connected in such a way that the computers can communicate with each other and their resources.
  8. 8Which of the following is(are) an example(s) of computer networks?Computer networks are a collection of hand-held devices connected via the Internet so that they can communicate with each other.
    Computer networks are a collection of computers and resources connected by various media so that they can communicate with each other.
    Computer networks are a collection of desktop computers and printers connected by cables to a central server so that they can communicate with each other.
  9. 9What is the primary tool used to connect to a network?computer
  10. 10An employee is using telnet to log into a colleague’s computer to troubleshoot an issue.Telnet is used to access one computer from another and can be done locally or remotely.
  11. 11An employee logs in from home to the company’s server to update their time sheet.The employee's home computer is local and the server is remote.
  12. 12The sales associate is using their desktop computer to develop a report using Excel.A desktop computer accessed by an employee in the same location is a local computer.
  13. 13The IT department is updating the ssh (secure shell) on the company’s server to provide improved access when employees are off-site.Though using ssh for improved off-site access the IT department is working on servers locally.
  14. 14how information is carried over the network. At this level, information is transmitted as bits over some type of Media—a physical connectionphysical network layer
  15. 15The most common form of network connection used todayUTP (Unshielded Twisted Pair) and fiber optic cable
  16. 16the transfer rate permissible over the media, described as some number of bits per second (bps or b/s)bandwidth
    Modern bandwidths are on the order of millions or billions of bits per second (Mbits/second, Mbps or Gbits/second, Gbps).
    Older technologies such as computer MODEMs (described later) were limited to hundreds or thousands of bits per second, such as 56 Kbps or 56,000 bits per second.
  17. 17coaxial and twisted pairelectric
  18. 18fiber optic cablelight pulses
  19. 19radio and cell towersradio waves
  20. 20What is meant by a particular media bandwidth?the amount of data that can be transmitted over a unit of time, such as bits per second ; Bandwidth is the transfer rate in bits per second and is influenced by the type of media.
  21. 21What is the typical bandwidth of today’s networks?Mbps to Gbps ; Mbps stands for megabits or millions of bits per second and Gbps stands for gigabits or billions of bits per second.
  22. 22The broadcast devices consist of ____. Collectively, these devices “glue” the network together by providing points where a network can connect to devices and to other networks.hubs, switches, and routers
  23. 23a device that connects multiple computers togethernetwork hub
  24. 24A hub ____ the transmission, as it sends the data to every device in the network.broadcasts
  25. 25its purpose is to only send transmissions to a specific, intended computernetwork switch
  26. 26a device that connects multiple networks togetherrouter ; Although you can use a router to directly connect computers in a network, routers are typically used instead in specific locations in a network so that messages can be routed to other networks.
  27. 27Externally, there is little to differentiate a hub from a switch from a router (other than perhaps the size).Internally, the switch has more hardware, including storage space for MAC and IP addresses, than a hub. A router contains programmable routing tables and includes at least one input that comes from another network.
  28. 28A network hub broadcasts messages to all computers connected to it. Network switches keep track of the addresses of the computers connected to them and only send messages to the computer they’re specifically meant for.A hub connects computers in a network, while indiscriminately transferring received messages to all computers in the network.
    A switch connects computers in a network and recognizes each computer’s IP address. It relays received messages only to the computer(s) with the corresponding IP address as the message.
    A router connects multiple computer networks. A router will relay messages to computers with appropriate IP addresses.
  29. 29can be connected to a hub, a switch, or a router. This device then sends out a wireless signal so computers on the network can connect without a cablewireless access point
  30. 30can be used to provide access to networks over long distancesradio waves
  31. 31This device normally broadcasts messages to all ports.network hub ; This device doesn’t have the capability of storing IP addresses, therefore it can’t distinguish one computer from another and sends messages to all computers in the network.
  32. 32Is commonly used to connect multiple computers together in such a way that messages are relayed to computers with the corresponding IP address.switch ; This device can store IP addresses of computers and send messages only to intended computers.
  33. 33This device connects multiple networks together.router ; Routers are most commonly used to connect networks not individual computers.
  34. 34Provide a means for devices and networks to communicate with each other and connect to devices in other networks.network hub, router, switch
  35. 35Is commonly connected to a routerwireless access point
  36. 36Is best used for long distancesradio tower
  37. 37Allows devices to connect without a cablewireless access point & radio tower
  38. 38Which of the following statements describes the difference between a switch and a network hub?A switch is a device that connects computers in a network and has the ability to transfer incoming messages to a specific intended computer based on the IP address on the message. A network hub is a device that connects computers in a network, but doesn’t have the ability to transfer messages to specific computers.
  39. 39Which of the following best describes the purpose of hubs, switches and routers within a network?Hubs, switches, and routers are devices that provide points within a network where messages can be relayed to the computers and devices within the network.
  40. 40Converting a digital signal to an analog signal.demodulation
  41. 41Converting an analog signal to a digital signal.modulation
  42. 42requires that a full pathway, or circuit, be established before transmission can begin and maintained during the entire transmission. Because the path exists during the entire conversation, communication in either direction can occur simultaneously.circuit switched network
  43. 43a message’s pathway is only established as it is sent. When a message is received at one location, if it is not the destination location, then the message is forwarded on to another location.packet switched network
  44. 44Most computer networks, including the Internet, are ____.packet-switched
  45. 45Which of the following is a characteristic of a packet-switched network?Communication taking place between the same two computers may reach their destination using different pathways.
  46. 46Used to move traffic from one network to another networkrouting ; A router is used to connect one network to another.
  47. 47Influences the path a message will take: direct or indirectrouting & switching ; Both routers and switches determine the path a message will take.
  48. 48Moving a message onto the appropriate networkrouting
  49. 49Computers on the network are roughly equal to each other and do not rely on central coordination.peer-to-peer network ; A peer means that each computer is roughly equal to every other computer.
  50. 50a network that contains one or more serversclient-server network ; The server is a computer that takes requests and responds with the requested information.
  51. 51a software emulator program that permits a computer user to use multiple computers and multiple platforms without the expense of purchasing multiple computersvirtual machine (VM)
  52. 52The role of the server in a business computing ecosystem is to:take requests from computers and respond with the requested information ; Servers are computers that typically have greater hard disk storage and faster response time and are used to respond to requests from other computers in a network.
  53. 53Common characteristics of servers are:larger hard disk drives for more storage, faster response time, more expensive.
  54. 54benefits of using virtual machinesPermits multiple platforms and multiple users, Provide a secure remote environment, Lower costs and improved collaboration, Ability to communicate with different OSs
    A virtual machine (VM) is a software emulator program that permits a computer user to use multiple computers and multiple platforms without the expense of purchasing multiple computers ; A VM can provide a secure remote environment ; This also provides for improved collaboration because platforms and software are not a limitation ; VMs can communicate with different OSs without needing multiple computers and multiple platforms
  55. 55Which of the following is the best definition of a virtual machine?A virtual machine is an illusionary computer that is stored in computer memory and made available by software in order to permit a computer user to use multiple computers and multiple platforms without the expense of purchasing multiple computers.
  56. 56What is the role of a client-server network in a business computing ecosystem?In a client-server network, software enables access to remote servers. This allows different parts of a business ecosystem to interact ; The software used in a client-server network facilitates communication with remote servers, which supports a business computing ecosystem.
  57. 57The term server may be used to refer to three different things.1) the hardware;
    2) the software on the hardware;
    3) hardware + software + data.
  58. 58server - hardwareIn some cases, servers are built into cabinets so that several or even dozens of hard disk drives can be inserted. The server is commonly a stand-alone computer.
  59. 59server - softwareServer software includes print service, ftp server, web server, e-mail server, database server, and file server. The software server must be installed, configured, and managed. These steps may be involved.
  60. 60Responds to client requests from anywhere on the Internet rather than just the LANweb server ; This is a special type of file server in that it still stores data files (web pages) and programs (scripts).
  61. 61Responds to client database queries with responses pulled from the database. Additionally, the server may generate reports from data obtained from the database management system.database server ; Like the file server, the database server typically responds only to local clients. Both the file server and the database server could respond to authorized clients from remote locations if the server was accessible over a wider area network. But like the web server, the duties of the database server go far beyond file transfer.
  62. 62Sends files over a local area network at the request of clients.file server ; The typical file server responds to requests over the local area network (LAN), which is a network within one location/site, such as one room, one floor, one building.
  63. 63server - hardware, software, dataFor instance, we might refer to a web server as hardware, software, and the documents stored there.
  64. 64print serversthe print server does not return a file, but instead monitors print jobs and replies with an acknowledgment that the print job has completed, or an error message.
  65. 65mail serverone submits e-mail to the server to be sent to another e-mail server. The two e-mail servers communicate with each other, and once the e-mail is received at its destination, the recipient server informs the recipient user that new e-mail has arrived.
  66. 66ftp servermuch like a web server or file server in that requests are for files and responses are the files.
  67. 67Store data files and programs, respond to client (computer) requests from anywhere, running server side scriptsweb server
  68. 68Respond to client queries, responds mainly to local clients, generate reportsdatabase server
  69. 69Users submit messages to the server that are sent to a different server, the servers communicate with each other, recipient server communicates with recipientemail server
  70. 70A _____________ does the following: Does not return files, monitors requests, replies when a request is complete.print server
  71. 71A _____________ does the following: Responds to client (computer) requests over the LAN, supports application software, shares data files.file server
  72. 72A _____________ does the following: Runs server side scripts, logs requests and errors, handles security.web server
  73. 73The topology chosen dictates the cost of the network as well as the amount of time it might take for a message to be routed to the destination. In addition, the topology can impact the reliability of the network.network topologies
  74. 74—In a bus network, devices are connected along a single cable.In a bus network, devices are connected along a single cable.
  75. 75—In a star network, each device is connected to a central device, such as a hub or switch.In a star network, each device is connected to a central device, such as a hub or switch.
  76. 76—In a mesh network, every device is connected directly to every other device in the network.In a mesh network, every device is connected directly to every other device in the network.
  77. 77—In a ring network, each device is connected directly to its neighbors, and messages are forwarded from device to device until the proper destination is reached.In a ring network, each device is connected directly to its neighbors, and messages are forwarded from device to device until the proper ...
  78. 78A dedicated link between two resources.point-to-point network ; As a network topology, point-to-point is not often used because it limits how devices can communicate with each other.
  79. 79Every resource is connected to a single shared cable; The cable is the network, and it carries one message at a time.bus network
  80. 80Every resource is connected individually to a central resource. This dedicated device acts as a communication hub, routing messages from one machine to the destination. The advantages of the star network are its simplicity, ease of adding (or removing) devices, and the efficiency of message transferal.star network
  81. 81Every resource is connected to its neighboring resource. Communication between devices requires sending a message to a neighbor and having that neighbor forward the message along the ring until it reaches its destination.ring network
  82. 82A ring network could be unidirectional or bidirectional in terms of the direction that messages travel.In a unidirectional ring, if a device were to go offline, it would detach the network into two such that some devices could no longer communicate with others.
    A bidirectional ring would require losing two devices before portions of the network became isolated.
  83. 83Every resource is connected directly to every other resource on the network. Any device can directly communicate with any other device without concern of message traffic, and if any device were removed, it would not harm the connectivity of the network. fully connected networkmesh network
  84. 84The ____ network topology is one of the least expensive.bus ; The bus network topology has a simple form where every resource is connected to a single cable.
  85. 85Message traffic is not a problem with the ____ network toplogy.star ; In the star network, all devices have a single point-to-point connection with a central server.
  86. 86The ____ network topology includes a point-to-point connect between each device in the network.mesh ; The mesh network, also known as a fully connected network, requires that every device have a point-to-point connection with every other device.
  87. 87—ringring
  88. 88—busbus
  89. 89—meshmesh
  90. 90—point to pointpoint to point
  91. 91—starstar
  92. 92Which of the following is a characteristic of a ring network topology?New devices can be easily added, however message transmission time may be longer based on the number of devices on the network.
  93. 93networks in retail example-router: connects multiple networks together
    -switch: sends transmissions to a specific intended computer
    -What is the likely reason that this transmission is sent through radio waves instead of coaxial or fiber optic cables? : the transmission is long distance. (firewall-radio tower-card processing)
    -card reader: bus
    -What type of transmission is being sent along this fiber optic cable? : light impulses
    -database server: contains payment data
    -web server: contains the web pages for customers
  94. 94Which of these network problems will James not be responsible for troubleshooting during a typical work week?a social media site on the internet is offline ; Although he may be able to offer some advice, websites like this will be out of James’ control and his ability to repair.
  95. 95Which of these physical networking media is typically fastest?fiber optic cable ; Bandwidth can reach 10Gbps over fiber.
  96. 96In the server room there is a device that has 20 separate Ethernet cables connected to it which is connected to additional hardware that is in turn connected to cabling coming out of the wall. What is the first device called?switch ; Switches like this are common in the enterprise and connect various wired devices directly to the network. It may however be a hub.
  97. 97A user comes to James with a dilemma. When he is in the building, he is able to use his smart phone to access files on the corporate network with no problem. But when he’s at home, the files are not available. This doesn’t make sense, he says, because he can access sites like Facebook from both places without a problem. What is the correct explanation for this issue?The user is accessing the corporate network via Wi-Fi, which is only available at the office. installing software like a VPN system could allow the user to access the corporate network from anywhere.
  98. 98A user wants to install software that hasn’t been thoroughly tested by the IT department and could represent a security risk. What’s the best way for James to do this without endangering the company’s network?Install the software on a virtual machine environment. ; This provides a secure environment for testing experimental software.
  99. 99A panicked user informs James that the e-mail server is down. Which of these could be the problem?A hardware device has lost power. ;
    The mail management software has crashed. ;
    The network connection to a bank of hardware devices has been lost. ;
    James will need to diagnose the problem to track down the actual issue.
  100. 100As discussed above, the network at XYZ includes a single cable running to each device. This is connected back to a bank of switches located in the server room. Each device is connected only to a switch and nothing else. What type of logical network topology is this?star network ; This is a one of the most popular network topologies today.
  101. 101Which of these things could James typically access through a network connection in his XYZ office?one of the computers in accounting ;
    XYZ office printers ;
    James' personal, internet-enabled home security cameras ;
    Any of these devices could possibly be used through a network connection from an office.
  102. 102James needs to connect a standard desktop computer to a network switch in the same room. Which connection media would he most likely use?Unshielded Twisted Pair (UTP) ; Being in the same room makes this connection convenient and inexpensive with most desktops.
  103. 103Which of these devices could not be directly connected to the XYZ office network, without going through a second network?James' desktop computer at home ; A device at another location would need to connect through additional networks.
  104. 104Which device would be indispensable if James wanted to connect an office computer to the internet?a router ; Only a router can connect between different networks.
  105. 105James is sending data through a network hub with several connections. Which of these receives the message?all devices connected to the hub ; Hubs send messages to all ports.
  106. 106James needs to run Windows-only software on his Linux computer, because there isn't a Linux version available. What would make this possible?a Virtual Machine ; Virtual Machines allow computers to run software from another OS.
  107. 107Phil is having trouble getting certain characters to appear when doing data entry work. Which point on the network would James usually check first in this situation?Phil's workstation ; This could likely be an issue with the individual user workstation, especially if only one user is experiencing the problem.
  108. 108James wants to live-stream video of a company meeting. Which type of network connection would he need?Client-Server ; Client-Server involves a central server offering files to individual devices.
  109. 109Which of these network structures would James avoid, when setting up a company network?In-Box ; This is not an existing type of network structure.
  110. 110James reboots his workstation, and suddenly, some of the other devices on his network are unable to communicate with each other. Which type of network structure is he using?unidirectional Ring ; Unidirectional Ring networks only have connections between individual devices in a line.
  111. 111James has about five older computers with coaxial network cards, and needs to save money. What kind of network topology is he likely to set up?bus network ; Bus networks tend to use coaxial connectors, and are the cheapest.
  112. 112Which of the following statements is true of computer networks?Computer networks allow individuals to share many types of resources.
  113. 113Which of the following describes local computers only?Is a computer that a person is physically at.
  114. 114Which of the following is the best definition of a computer network?A computer network is a collection of computers and computer resources (e.g., printers, file servers) connected in such a way that the computers can communicate with each other and their resources.
  115. 115What is the most common type of network connection in use today?Fiber optic and UTP
  116. 116Which of the following type of transmission is paired correctly with the given media?fiber optic cable - light impulses
  117. 117Why would it be desirable to use a switch as opposed to a hub in a network?Because switches only transfer information to specific computers within a network and not all of the computers, the bandwidth used with a switch is less than that of a hub.
  118. 118Which of the following devices is used to connect one network to another network?router
  119. 119Which of the following communication system hardware devices is commonly used as a wireless access point?router
  120. 120Which of the following are characteristics of a packet-switched network?B. The choice of pathway is based on network availability and amount of message traffic.
    C. The route is established one branch at a time.
  121. 121How do a router and switch differ when handling a message?There is no difference in how a router and a switch handle messages.
  122. 122In a client-server network, what is the role of the server?The role of the server is to take requests from the client and send back the requested information.
  123. 123How do virtual machines support a business computing ecosystem?A virtual machine (VM) is made available by software and permits a computer to run multiple OSs. In a business ecosystem, this allows for improved collaboration that is not restricted by platform software.
  124. 124Which of the following servers responds to HTTP requests on the Internet?web server
  125. 125Which of the following servers monitors requests, but doesn’t send files in return?print server
  126. 126Which of the following servers can generate reports from client queries?database server
  127. 127Which of the following is NOT a characteristic of a bus network topology?Is a very reliable form of network.
  128. 128Which of the following types of networks has each device in the network connected in a single point-to-point connection with a central HUB?star
  129. 129Which of the following best describes the benefits of a star network topology?It is easy to add (or remove) devices on a star network and maintain the efficiency of message transferal.
  130. 130What causes a computer to be classified as a remote computer?It is considered remote if it the user is not physically present with the computer.
  131. 131What is the primary focus of a physical level analysis of a network?the types of physical media and connections that bring devices into communication on the network
  132. 132When long distances make cables impractical, what other means are used to transmit network informationradio towers
    cell phone towers
    satellites
  133. 133Which networking device is used to connect multiple networks together?router
  134. 134In what type of network routing is a full pathway established between computers before transmission begins?circuit switched routing
  135. 135In a packet switched network, if a message is received by a routing device which is not at the actual destination location, what happens to the message?The message is sent along to another location in order to help it reach its destination.
  136. 136A message received by a ____ is forwarded to all devices connected to all ports.hub
  137. 137Tables with IP addresses of other networks are used in what network activity?routing
  138. 138In some networks, certain computers are dedicated to storing and providing information at the request of other computers. What is the name of the computers that do the storing and providing of information?servers
  139. 139Servers are usually ____ expensive compared to non-servers.more
  140. 140What is one advantage of using a VM to emulate other computing environments?Different users with various operating systems can make use of the same software programs that would otherwise not be compatible with their operating systems.
  141. 141A virtual machine is a software emulator that permits a computer user to use multiple ____ without the expense of purchasing multiple computers.operating systems
  142. 142What type of specialized file server has the additional duties of running server side scripts, returning html files, logging requests and errors, and handling security?web server
  143. 143Which of the following is a correct use of the term “server”?a dedicated computer used to provide a service
    the software that is run on a computer dedicated to providing a service
    the collection of hardware, software, and data that together make up a computer used to provide a service
  144. 144A specialized research institute is in need of a network environment that will be extremely reliable and allow for very fast communication between any two devices on the network. The network will be comprised of a small number of very powerful computers dedicated to particular research tasks. Though there are only a few devices on the network, they communicate with one another very often, sending large amounts of information as they do so. Due to very generous funding, the cost of the network is a very small factor in deciding what form to implement. Speed and reliability are the most important factors. What network topology would be best to use in this situation?mesh topology; In most cases, the high cost of a mesh topology means it is not a viable option, but when cost is not a significant factor, and both speed and reliability need to be optimal, a mesh topology can be the right choice.
  145. 145In what network topology is there an important difference in reliability that depends on whether the network is unidirectional or bidirectional?ring topology; Because the network is arranged in a complete ring, it can function even if messages can only travel in one direction. However, if the ring is unidirectional, the failure of even one device disrupts the network. If it is bidirectional, two device failures would be needed to disrupt the network.
  146. 146Documents and other resources are interlinked by hypertext and accessed by the Internet; a collection of files, linked together by hyperlinks.World Wide Web
  147. 147A network of networks governed by the TCP/IP protocol.internet
  148. 148a network that operates within a limited geographical location, usually contained to a building.local area networks (LAN),
  149. 149breaks the communication down into small packets of data, and each is sent across the network separately. Each packet could potentially take a different pathway to reach the destination.Packet switching; was pioneered in the 1960s when the Internet was first being constructed.
  150. 150the device that permits packet switching so that a message can be routed to the next link in the network “on the fly.”routers
  151. 151A numerical label assigned to any device that uses the Internet Protocol.IP addresses
  152. 152reference to a web resource, identifying its location on a network.URL (Uniform Resource Locator)
  153. 153converts an IP address into a URLDomain Name Server
  154. 154Packet switching is a ____ that is used to send messages over the internet.method of breaking down communications
  155. 155Routers ____ until they reach a LAN.route messages
  156. 156IP addresses ____ to facilitate communication over the internet.have English-like name aliases ; Because IP addresses consist of numbers, they have English-like name aliases to make it easier for individuals to remember an address – such as CNN.com versus http://157.166.226.26.
  157. 157For an IP address of 132.216.76.45, the 132 part represents ____.the overall network
  158. 158is a device that receives a message and sends the message on to the next location in the network.router
  159. 159Which would be an example of a subnet mask address?255.255.255.0 ; A subnet mask consists of decimal numbers 255 and 0.
  160. 160is a network that requires a router in order to communicate with the Internet.LAN
  161. 161www.google.com is an example of a(n) ___IP alias ; An IP alias is an English-like name for an IP address.
  162. 162reflects the set of rules by which the resource is transmittedProtocol: http://
    Web pages use HyperText Transfer Protocol (HTTP), so http is standard. The protocol is followed by a colon (:) and two forward slashes (//). With today’s more modern browsers, you can usually leave out the http:// portion when you are typing a URL.
  163. 163____ allows for file transfers between hosts; ____ is the protocol uses for some email systemsFTP ; SMTP
  164. 164was developed at the University of Minnesota, whose mascot is the gopher, thus the name given to this particular protocolgopher protocol
  165. 165identifies the server on which the web page can be foundDomain Name: www.forbes.com
    Domain names usually start with the prefix ‘www’.
  166. 166The domain name can be considered in two parts:the host name; Part of the URL typically identifies the organization that is responsible for the information on the page or provides the server space where the information is stored.
    the top-level domain (TLD) name; Signifies the type of organization or country associated with the page. The domain name always ends with a period (‘.’) and a three- or two-letter extension, which signifies the type of organization or country associated with the page.
  167. 167connects the domain name with its numerical IP addressthe Domain Name System (DNS)
  168. 168The following is a list of frequently used TLD names for websites hosted in the United States:.com – company or commercial sites
    .org – non-profit organization sites
    .edu – educational sites
    .gov – government sites
    .net – Internet service providers or other types of networks
  169. 169Two-letter domain names identify a country. For example:.us – United States
    .uk – United Kingdom
    .au – Australia
    .mx – Mexico
    .ca – Canada
    .jp - Japan
  170. 170indicates the name of the file you are accessing, or the location of the document on the serverResource ID: /technology/
    The part of the resource ID after the slash (/) is the file name for the page. The file name may end with a three- or four-letter designation extension that signifies the file type. For example:
    .htm or .html – standard webpage
    .jpg or .gif – graphic file
    .pdf – a portable document file
  171. 171identifies the server on which the web page can be founddomain name : abank.com
  172. 172indicates the name of the file you are accessing or the location of the document on the serverresource ID : /checking
  173. 173the set of rules by which the resource is transmittedprotocol : https://
  174. 174An internet protocol that is used to facilitate the transfer of files is ____.File Transfer Protocol FTP
  175. 175An internet protocol that is used to facilitate host to host connection and retrieval of documents.gopher
  176. 176http://www.cnn.com/travel/ http://protocol
  177. 177http://www.cnn.com/travel/ /travel/resource ID
  178. 178http://www.cnn.com/travel/ www.cnn.comdomain name
  179. 179packetsYour computer takes your message and packages it up into one or more packets. Packets are relatively small. If the message is short, it can fit in one packet.
  180. 180The following are characteristics of a DNS serverIt is a server with a table that contains IP addresses and aliases.
    It translates Internet aliases to IP addresses.
    Sends requests to other DNS servers when it cannot locate an IP alias.
    A DNS does store an IP address for a particular alias in its local DNS server table after receiving it from a higher-level DNS so that it is available for later use.
  181. 181Maria is sending an e-birthday card to her grandmother. Place the steps below in the correct order to show the path the message would take from Maria’s computer to her grandmother’s computer.Maria’s e-birthday card to her grandmother would first be divided into multiple small packets by her computer.
    Each packet of Maria’s message is given the destination address. Once the IP address has been provided, the packets are sent out.
    If Network Address Translation (NAT) is being used at the remote site, the IP address is translated from an “external public” address to an “internal private” address. The internal private message then continues to be routed internally to the destination network.
    All packets of Maria’s e-birthday card would be combined together as they arrived. Once all the packets have been received, the final message is then presented to the appropriate application software.
  182. 182Imagine that Domain Name Servers (DNS) did not exist. How would that affect communication on the Internet?- You would have to type in exact IP addresses by number instead of name. - Users would have to save lists of web IP addresses since the DNS won’t be there to save them for them. - E-mail exchangers would not work properly since the DNS houses MX records. - Web filters that block certain websites by having the DNS point to a “blocked” webpage message instead of the real site may no longer work.
  183. 183The ordering of packets is done by:a higher-level TCP protocol
  184. 184is a tool for testing the path a packet takes from a source to its destinationTraceroute ; can be used as a diagnostic tool to determine what connection (i.e. router) is not working as expected
  185. 185Which is not part of a correctly formatted URL?IP address
  186. 186Which is not a commonly used top-level-domain?ICANN recently opened the door for nearly any string of characters to be used as a TLD.
  187. 187The marketing department wants to create a web page to promote XYZ’s latest widget. What would James need to create on XYZ’s web server to create this page as part the xyzwidgets.com website?resource name
  188. 188James just got finished installing a new router. He has just increased the size of ____.the Internet
  189. 189TCP/IP is one of many ____.protocols
  190. 190What can James type into any web browser, to bring up the XYZ Widgets web page?the page URL
  191. 191How is an Internet connection most different from a land telephone line connection?packet switching
  192. 192Which one of these would be a correctly formatted URL?http://www.xyzwidgets.com/aboutjames
  193. 193If a domain extension has two letters, it indicates ____.a country ; Sometimes, content providers buy domains from specific other countries, for aesthetic reasons, but the extensions were created to indicate countries.
  194. 194James types http://www.google.com into his web browser, and gets a “Server Not Found” message. He can access other websites on this computer, and can reach www.google.com successfully from other computers. What would he likely check next?DNS configuration
  195. 195James wants to add a shopping section to the xyzwidgets.com website, and makes it a secure connection. How does the URL differ from a normal URL?It begins with https://.
  196. 196Which device permits packet switching so that a message can be routed to the next link in a network?router
  197. 197In order to translate from an IP alias to an IP address, which of the following is used?DNS
  198. 198Which of the following best describes the Internet?The Internet is a global network of networks.
  199. 199Which is part of the definition of Domain Name?Identifies the server on which a web page can be found.
  200. 200All of the following are parts of a URL except for:LAN

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computer informations Karteikarten am Topic 4: Computer Networks, erstellt von Cassie Xayaseng am 08/06/2024.
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Cassie Xayaseng
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