Fichas
Networks
Fichas del conjunto (28)
- 1What is a computer network?Two or more computers connected together
- 2Describe a LANIt is a local area network
Each device is called a node (printer etc.)
A LAN is installed on one site - 3Describe a WANIs a Wide Area Network
Covers a large geographical area
Use cables, telephone lines, Satellites and radio waves to connect - 4What are the advantages of a computer network?Files can be stored
share files
resource sharing - 5What are the disadvantages of a computer network?Not very secure
No central point of storage or file archiving - 6What devices are needed to produce a LAN?Network adapter
network medium
cable connectors
Power supply
Hub/switch/router
Network software - 7What is the purpose of a NIC?It is an expansion card that enables a computer to connect to a network.
- 8What is the purpose of a Router?The main purpose of a router is to connect multiple networks
- 9What is the purpose of a Hub?is a common connection point for devices in a network.
- 10What is the purpose of a Switch?switch is supposed to perform is to receive information from any source connected to it
- 11What is the purpose of a WAP?is a hardware device or configured node on a local area network (LAN) that allows wireless capable devices and wired networks to connect through a wireless standard, including Wi-Fi or Bluetooth.
- 12What is the difference between a Hub and a Switch?What's the difference between a Ethernet hub, a switch, and a router? Ethernet hubs, switches, and routers are all devices that let you connect one or more computers to other computers, networked devices, or even other networks.
- 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 Modem?WHAT IS THE PURPOSE OF A MODEM? Modem 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 organisation that provides services accessing and using the Internet
- 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 network.
- 18What does HTTP stand for?"Hyper Text Transfer Protocol"
- 19What is a URL?the address of a World Wide Web page.
- 20How is a URL constructed?A URL can be thought of as the "address" of a web page and is sometimes referred to informally as a "web address.
- 21What are the three different network topologies?Mesh Topology. Mesh Topology: In a mesh network, devices are connected with many redundant interconnections between network nodes
- 22What are the advantages / disadvantages of a Star topology?Star typology: advantages and disadvantages. In star topology, alll the components of network are connected to the central device called hub which may be a hub, a router or a switch.
- 23What are the advantages / disadvantages of a 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,
- 24What are the advantages / disadvantages of a Bus topology?Alternatively 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.
- 25List examples of data that need to be kept securemaking regular backups of files (backup copies should be stored in fireproof safes or in another building)
protecting yourself against viruses by running anti-virus software
using a system of passwords so that access to data is restricted
safe storage of important files stored on removable disks, eg locked away in a fireproof and waterproof safe
allowing only authorised staff into certain computer areas, eg by controlling entry to these areas by means of ID cards or magnetic swipe cards - 26What is HTTPS and what is it used for?HTTP 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 commands.
- 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 taking encoded or encrypted text or other data and converting it back into text that you or the computer can read and understand. This term could be used to describe a method of un-encrypting the data manually or with un-encrypting the data using the proper codes or keys.
Información
- Descripción
- Fichas sobre Networks, creado por Ashar Shah el 04/12/2017.
- Creado por
- Ashar Shah
- Visitas
- 10
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