Networks

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Discuss the rela ve advantages and disadvantages of ring and star
topologies (6) (Jan 2012)
Advantages of ring: Each computer has the same access as the
others so no one computer can hog the network
Advantages of star: Fault tolerant ­ if one of the cables fails, then
the other computers can s ll be used
Disadvantages of ring: If there is a break in the connec on then the
whole network fails, Faults are difficult to locate
Disadvantages of star: Dependence on the central server/hub
Compare and contrast the rela ve advantages and
Other than cost or security issues, explain in detail two factors disadvantages of ring and star topologies. (6) (June 2011)
that could influence the choice of a network for a company. (2x2)
(Jan 2012) Advantages of ring: Each computer has the same access as the
others so no one computer can hog the network
Size of the organisa on: Needs can range from a small LAN to a Advantages of star: Fault tolerant ­ if one of the cables fails, then
global WAN as some communica ons media are limited by the the other computers can s ll be used
distance they have to travel. Disadvantages of ring: If there is a break in the connec on then the
How the system will be used: Will they need large data whole network fails, Faults are difficult to locate
storage? / Are they going to store a large number of data files? Disadvantages of star: Dependence on the central server / hub
Peertopeer and client server are two types of computer network. Compare and
contrast the two types of network (6) (Jan 2011)
Describe the use of user accounts and logs as a way of
ensuring the confiden ality of customer records. (2) No server is needed for a Peer to Peer, so all the computers can be the same, as
(June 2011) buying servers are very expensive (Client server)
They are the simplest of computer networks, and can be set up by anyone , unlike a
Audi ng keeps a record of who has done what on the network. Client server as you require technical knowledge to setup and maintain
Usernames Only suitable for very small networks (15 or less) as each computer is directly
The mes they logged on and off connected to another, whereas the client server is more load tolerant
Details of programs they used
Details of files accessed
Details of changes made
Managing user accounts
Alloca on of passwords Other than cost or size of the organisa on, explain in
detail three factors that could influence the choice
of a computer network for the organisa on. (6)
(Jan 2011)
Explain two other factors which the company should take
into account when designing its security policy. (4) (June Large data storage? Are they going to store a large
2011) number of data files?
More o en networks are not developed from scratch but
Preven on of misuse using logical (so ware) methods user ids, need to fit in with exis ng systems. Some mes an
passwords, levels of access ( e.g. who can update web pages) extension is required e.g. when a new branch office
Staff code of conduct and responsibili es, e.g. Downloading opens.
from the internet It must support any peripherals already in use e.g. bar
code readers, printers, etc.

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Mr A Gibson

Another great resource from this contributor which shows previous exam questions and main points required as a starting point for planning answers. Checkout this users other resources for ICT too!

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