a) Describe 3 benefits of a company moving to a wireless network compared to staying with its cabled network(3) b) Describe 2 problems that may occur (2) There is no need for cabling. If new computers need to be added to the network There is no need for new cables and network points. Mobility. Computers do not need to be in fixed locations Hand held devices can easily attached to the network to upload or download data Speed – wireless networks often run at slower speeds that cabled networks e.g. Especially if the signal is shared Reliability – the strength of the signal is not always sufficient to work e.g.. In an isolated corner Health Issues – are wireless networks truly safe ? Are the microwaves harmful To humans. Not enough studies on this

2. What are the main hardware components needed for a wireless network?(3) 3. Describe 3 benefits of a PDA over a laptop (3) Wireless card in the computer Wireless hub serving the building Size – much more easy to use e.g. on the move Storage – easy to take with you on a train / plane Extra features– phone, text sat nav

4. What is meant by the term Protocol in computer systems? (2) 3. Describe what ids meant by (6) A set of rules That allows two different devices to communicate successfully e.g. speed of transmission format of transmission error checking method termination signal HTTP – Hyper text Transfer Protocol is the protocol used to transfer files from a Web server onto a browser. HTTP is a one-way system as files are transported only from the server onto the workstation's browser E.g. when viewing a web page It is transfer from the server that holds it to your computer using HTTP FTP – File Transfer Protocol - the way that files get transferred from one device to another in order for the files to be available on the Internet FTP is a two-way system as files are transferred back and forth between server and workstation TCP/IP – Transmission Control Protocol is one of the main network protocols. TCP guarantees delivery of data and also guarantees that packets will be delivered in the same order in which they were sent