State one difference between star and bus topologies (b) List four common network devices. (c) Write the acronyms below in full HTML, HTTP, ISP, SMTP.

Answer Details

(a) One difference between star and bus topologies

In a star topology every computer is connected by its own cable to a central device (a hub or switch), so all data passes through that central point; if one cable fails only that one computer is affected. In a bus topology all computers are connected to a single common cable (the backbone), and if that main cable breaks the whole network goes down.

(b) Four common network devices

1. Hub.
2. Switch.
3. Router.
4. Modem. (Network interface card, bridge and repeater are also acceptable.)

(c) The acronyms in full

• HTML - HyperText Markup Language
• HTTP - HyperText Transfer Protocol
• ISP - Internet Service Provider
• SMTP - Simple Mail Transfer Protocol