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Topic 1.4 Revision
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- 1LAN (Local Area Network)Computers connected together over a small geographical are such as a single building or single site
- 2Give 3 examples of a LANHome network, School network, Network in a shop
- 3WAN (Wide Area Network)Computers connected together over a large geographical area such as a group of buildings
- 4Name the biggest WANThe internet
- 5LAN has its own infrastructure of cabling and network hardware
- 6WAN uses external hardware and external infrastructure e.g use of a satellite
- 7Client serverThe network relies on a central server
All clients devices request services from server
Additional hardware is needed - 8Peer-to-PeerAll computer have equal status
Each device can act as a client and a server
All devices can request and provide network services - 9On a client server all files can be stored on a central server meaning workers can access files from any device on that server making it easy to share files
- 10On a peer to peer server all files are stored on their own computer meaning you have to log in to the same computer every time
- 11The internetworld wide collection of computer networks that are connected together (inter-networking)
- 12DNS (Domain Name Server)When accessing a web page we use a URL to access the page for example www.goconqr.com the .com is the DNS or domain name server
- 13The role of a DNS serverWhen you type that URL into the web browser the computer will query a DNS Server (Domain Name Server)
The DNS has a list of all domain names and their associated IP addresses.
All packets are transmitted as IP addresses – therefore to access the server that holds the OCR website – we would need to know the IP address. - 14HostingHosting is when you place a web site on a web server
- 15What things you need to do to be able to start hosting?Need to select a suitable domain name
Need to register domain name with the domain registrar
Each registered domain name is given an associated I.P address - 16The cloudThe cloud is a network of servers
Some servers will run applications
Some servers will store data - 17The benefits of the cloudIncrease storage e.g. from mobile phones
Access files from anywhere in the world
Collaborate with others from around the world - 18Virtual networkWith in a LAN it is possible to break the network into virtual networks to allow one group of devices to not see other devices on the network
- 19Star NetworkA star network is a local area network (LAN) in which all workstations or other devices are directly connected to a common central computer.
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- Fichas sobre Topic 1.4 Revision , creado por Finnlay Young el 30/11/2019.
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- Finnlay Young
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