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- 1what is a computer network?two or more computers connected together to share information
- 2Describe a LANit is a local area network.each device is a node.A LAN IS installed on the site. relatively small,it is owned by a organisation.
- 3describe a WANcover a large geographical area. use cables,telephone lines,satellite and radio waves to cannot
- 4what are the advantages of a computer network?PRINTERS AND SCANNERS CAN BE SHARED.the whole network can be backed up centrally.messages can be sent between users,can share files which prevent duplication of information.
- 5What are the disadvantages of a computer network?A TRAINED PERSON IS NEEDED TO MANAGE THE NETWORK.writing can be expensive to buy and install security is an issue as a virus can effect all computers.
- 6What devices are needed to produce a LAN?Router,hardware,hub,a switch,NIC.
- 7What is the purpose of a NICThe NICs convert the data signals from the nodes into data signals that can be transferred across the network.
- 8What is the purpose of a Router?Routers work by sending data between networks (e.g. over the internet)
- 9What is the purpose of a HubHub
A device that connects
nodes together.
Not intelligent – data
is sent to all nodes
across the whole of the
network.
Cheap devices – USB hubs
useful in home computer
installations. - 10What is the purpose of a SwitchSwitch
A device that connects nodes together.
An intelligent device that can sends data to the nodes that the data is intended for.
This reduces network traffic because making the network run faster. - 11What is the purpose of a WAP?In computer networking, a wireless access point (WAP), or more generally just access point (AP), is a networking hardware device that allows a Wi-Fi device to connect to a wired network.
- 12What is the difference between a Hub and a Switch?Not intelligent – data
is sent to all nodes
across the whole of the
network. - 13What is the Internet?a global computer network providing a variety of information and communication facilities, consisting of interconnected networks using standardized communication protocols
- 14What is the World Wide Web?an information system on the Internet which allows documents to be connected to other documents by hypertext links, enabling the user to search for information by moving from one document to another
- 15What is the purpose of a ModemModem stands for MOdulator/DEModulator. A modem converts digital signals generated by the computer into analog signals which can be transmitted over a telephone or cable line and transforms incoming analog signals into their digital equivalents.
- 16What is the purpose of an ISP?An Internet service provider (ISP) is an organization that provides services accessing and using the Internet. Internet service providers may be organized in various forms, such as commercial, community-owned, non-profit, or otherwise privately owned.
- 17What is an IP address?a unique string of numbers separated by full stops that identifies each computer using the Internet Protocol to communicate over a networ
- 18What does HTTP stand forHTTPS stands for Hypertext Transfer Protocol Secure, and instead of acting as its own application layer protocol, it uses separate protocols called SSL (Secure Sockets Layer) and TLS (Transport Layer Security
- 19What is a URL?the address of a World Wide Web page.
- 20How is a URL constructedA URL can be thought of as the "address" of a web page and is sometimes referred to informally as a "web address." ... A URL is made up of several parts. The first part is the protocol, which tells the web browser what sort of server it will be talking to in order to fetch the URL
- 21What are the three different network topologies?There are really three basic types of topologies. They are Star, Bus, and Ring. Let me explain them to you. Star – All computers and devices are connected to a centrally located hub or switch
- 22What are the advantages / disadvantages of a Star topologyStar Topology: Advantages and Disadvantages. In Star topology, all the components of network are connected to the central device called “hub” which may be a hub, a router or a switch. ... So it can be said that every computer is indirectly connected to every other node by the help of “hub
- 23What are the advantages / disadvantages of a Ring topologyDisadvantages of ring topology. All data being transferred over the network must pass through each workstation on the network, which can make it slower than a star topology. ... The hardware needed to connect each workstation to the network is more expensive than Ethernet cards and hubs/switches
- 24What are the advantages / disadvantages of a Bus topologyAlternatively referred to as a line topology, a bus topology is a network setup in which each computer and network device are connected to a single cable or backbone. The following sections contain both the advantages and disadvantages of using a bus topology with your devices
- 25List examples of data that need to be kept securea USB
- 26What is HTTPS and what is it used forHTTP is the underlying protocol used by the World Wide Web and this protocol defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various command
- 27What is encryptionthe process of converting information or data into a code, especially to prevent unauthorized access
- 28What is decryption?Decryption is the process of transforming data that has been rendered unreadable through encryption back to its unencrypted form. In decryption, the system extracts and converts the garbled data and transforms it to texts and images that are easily understandable not only by the reader but also by the system. Decryption may be accomplished manually or automatically. It may also be performed with a set of keys or passwords
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- Fichas sobre Sin título, creado por Kaleb Bairstow el 01/12/2017.
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- Kaleb Bairstow
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