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Computing revision
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- 1What is a WAN?Wide Area Network – LANs connected to each other
- 2Advantages and disadvantages of WANsAdvantages: Allows access over a large geographical area, you can share files between organisations, if one server goes off-line you can still access your server, boosts privacy due to not having to send data over the internet
Disadvantages: If one is compromised it can spread, expensive to set-up, security concerns from internal breaches, maintenance can be expensive - 3What is a LAN?Local Area Network – one server with multiple devices connected to it
- 4Advantages and disadvantages of LANsAdvantages: allows you to access files on multiple computers in the same network, can share costly resources e.g printers, central back-up can take place
Disadvantages: print queues may occur because of sharing printers, if one computer is compromised it can spread throughout the network, an employee might have a bad password so a hacker can gain access to their account and breach the server from within, if the main server goes down everyone looses access to files - 5What is a PAN?Personal Area Network - computer network for connecting devices centered on an individual persons work space e.g mobile hotspot
- 6Advantages and disadvantages of a PANAdvantages: cost effective, easy to set up, portable
Disadvantages: Short range, low transfer speeds - 7What is a ring topology?Where all the computers are connected to each other in a network
- 8What is a star topology?Where each computer has a cable going to it from the server
- 9What is a bus topology?Where there is a cable down the middle (central bus) and each computer connects to the central bus
- 10What are the forms of network security?Encryption
Authentication
Address filter
Firewall - 11What is encryption?The process of converting information or data into a code to prevent unauthorized access. You need a decryptor to access it.
- 12What is address filter?Where you are unable to access certain addresses e.g in school we can't access porn etc.
- 13What is authentication?Where you have to sign in to access things e.g logging into your account, requiring administrator password to make changes to computer etc.
- 14What is a firewall?It prevents unauthorised access from external sources
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- Fichas sobre Computing revision, creado por Lee Crawshaw el 18/07/2018.
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- Lee Crawshaw
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