Flashcards
network revision
Flashcards do conjunto (28)
- 1What is a computer network?a computer network is 2 or more devices joined together to share resources
- 2describe a lanlocal area network
a network that covers a small geographic area
eg: a school system - 3describe a wanwide area network
a network that covers a large geographical area
eg: the www - 4What are the advantages of a computer network?they help keep businesses connected and help people meet new people and keep in touch
- 5What are the disadvantages of a computer network?they can be hacked or broken
- 6What devices are needed to produce a LAN?some devices with a nic, a hub/switch, some wires(possibly)
- 7What is the purpose of a NIC?network interface card
it is needed for devices to be able to connect to a network - 8What is the purpose of a Router?it will support a wired or wireless network
- 9What is the purpose of a hub?it has multiple ports to connect computers into and is used to physically link computers using cables.
- 10What is the purpose of a Switch?it is used to control what resources are being shared to which devices
- 11What is the purpose of a WAP?it is required to allow wireless devices to connect to a network, they convert data from cables into wireless signals.
- 12What is the difference between a Hub and a Switch?a switch can control what goes where whereas a hub sends any resource to every device
- 13What is the Internet?it's a global computer network providing a variety of information and communication facilities, consisting of interconnected networks using standardised communication protocols.
- 14What is the World Wide Web?it's 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?it's a combined device for modulation and demodulation, for example, between the digital data of a computer and the analogue signal of a telephone line.
- 16What is the purpose of an ISP?internet service provider
it provides a person with connections to the internet - 17What is an IP address?it's a string of numbers and full stops that identify a computer
- 18What does HTTP stand for?Hypertext Transport (or Transfer) Protocol
- 19What is a URL?it's a web pages address
- 20How is a URL constructed?dunno
- 21What are the three different network topologies?star, ring, bus
- 22What are the advantages / disadvantages of a Star topology?they are quick and secure
they cost alot of money - 23What are the advantages / disadvantages of a ring topology?they are quick and cheap
they are insecure - 24What are the advantages / disadvantages of a bus topology?they are cheap and secure
they are slow - 25List examples of data that need to be kept securename, address, age, bank details, school/workplace, places often visited, some interests, etc
- 26What is HTTPS and what is it used for?HTTPS is Hyper Text Transfer Protocol Secure the same as HTTP but secure used to allow the exchange of content on the internet.
- 27What is encryption?encryption is where a piece of text is 'hidden' in some sort of code like binary
- 28What is decryption?the opposite of encryption where you break the code on a piece of encrypted text
Informações
- Descrição
- FlashCards sobre network revision, criado por Saysha Scott-Lawson em 08-10-2018.
- Criado por
- Saysha Scott-Lawson
- Visualizações
- 0
- Avaliação