TMA 14

Q1. The OSI model has been devised to allow the hardware and software from different manufacturers the facility to be able to communicate together on any network. It is broken down into seven layers. Using your notes, define the following layers:

1) The application layer

2) The presentation layer

3) The session layer

4) The transport layer

5) The network layer

6) The data link

7) The physical layer

Q2. What is a proxy server used for?

Q3. Describe the difference between circuit switching and packet switching.

Q4. Describe three benefits you would gain from using networked computers?

Extension Question.

The Junior School is planning the installation of 100 new computer workstations. Unlike its original suite of computers, these will be networked.

a) Describe one economic factor and one technical factor, which have led to the development of computer networking.

b) In addition to the 100 computers, three servers will be required. One of these will be a fileserver.

i) Name two other types of server, which are likely to be needed.

ii) Describe the function of your chosen two servers.