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Computer networks: LAN, WAN and network hardware basics
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- 1What is a computer network?two or more computers connected together to share information and resources
- 2Describe a LANA LAN covers a small area such as one site or building, e.g a school or a college.
- 3Describe a WANA WAN covers a large geographical area. Most WANs are made from several LANs connected together.
- 4What are the advantages of a computer network?Sharing devices such as printers saves money.
Site (software) licences are likely to be cheaper than buying several standalone licences. - 5What are the disadvantages of a computer network?Viruses can spread to other computers throughout a computer network.
There is a danger of hacking, particularly with wide area networks. Security procedures are needed to prevent such abuse, e.g a firewall. - 6What devices are needed to produce a LANnetwork interface card
hub
switch
router - 7What is the purpose of a NIC?the network interface card is a card that is fitted to an expansion slot on the motherboard of the computer
- 8What is the purpose of a Router?it works by sending data between networks over the internet.
- 9What is the purpose of a Hub?a device that connects nodes together
- 10What is the purpose of a Switch?a device that connects nodes together
- 11What is the purpose of a WAP?WAP enhances wireless specification interoperability and facilitates instant connectivity between interactive wireless devices (such as mobile phones) and the Internet.
- 12What is the difference between a Hub and a Switch?A Hub is a networking device that allows one to connect multiple PCs to a single network.
- 13What is the Internet?a global computer network providing a variety of information and communication facilities.
- 14What is the World Wide Web?an information system on the Internet which allows documents to be connected to other documents by hypertext links
- 15What is the purpose of a Modem?A modem converts digital signals generated by the computer into analog signals which can be transmitted over a telephone or cable line
- 16What is the purpose of an 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 network.
- 18What does HTTP stand 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).
- 19the address of a World Wide Web pageA URL can be thought of as the "address" of a web page and is sometimes referred to informally as a "web address.
- 20What are the three different network topologies?Bus Topology. ...
Ring Topology. ...
Tree Topology. - 21What are the advantages of a Star topologyvery reliable – if one cable or device fails then all the others will continue to work expensive to install as this type of network us
- 22What are the disadvantages of a Star topologyDisadvantages of a Star Topology. Requires more cable length than a linear topology.
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- Fichas sobre Sin título, creado por Imaan Mahmood el 17/11/2017.
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- Imaan Mahmood
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