Network Protocols

Network Protocols

1. A computer network is a number of computers linked together to allow them to share resources. Networked computers can share hardware, software and data. e.g at home, school, hospital

2. A Star Network is each device is connected by an individual cable directly to the server. Star networks are usually the layout of choice in schools and offices because they tend to be the most reliable of the topology.

3. A Mesh Network is Where some or all of the workstations or other devices are connected directly to each of other. Most are usually connected to the node that they exchange the most data with.

4. Ethernet Benefits - Stable connection, less likely to get hacked, more secure, Faster traffic speed, generally have a better signal.

5. Wifi Benefits - Cheap set up costs, vulnerable when getting hacked, the signal is affected by walls or obstructions, can connect multiple devices without extra hardware, user not tied down to specific location, slow transfer speeds and may not be able to receive signal.

6. Wifi is Wireless Frequency - radio waves are used to transmit data packets without the need for wires

   • This method is slower and more vulnerable to attack but it removes the need for cabling and networks
     • This means that it can be set up in remote locations such as in vehicles, in parks or on planes etc.

7. Encryption is a method of scrambling data with a key code which makes no sense. E.g public network - because every one can join and steal data so encryption is used. The data will have no meaning.

   • E.g When you are using a secure site for example your bank, or purchasing on Amazon, encryption applied to keep your details safe: The encryption method used is called 'SSL' (Secure Socket Layer).

8. Topology is A network topology is the pattern in which nodes (i.e., computers, printers, routers or other devices) are connected to a local area network (LAN) or other network via links