Get Started. It's Free
or sign up with your email address
Rocket clouds
Topic 5 by Mind Map: Topic 5

1. A computer network is when you connect devices to share data/resources.

1.1. Advanatges

1.1.1. It saves time when you share data with multiple people

1.1.2. The data is easy to backup

1.1.3. Devices can be shared using a network

1.2. Disadvantages

1.2.1. Viruses can spread to computers through a network

1.2.2. If the server crashes the files are inaccessible

1.2.3. Networks can slow down when too many people are using it

2. Packets

2.1. Header

2.1.1. The header contains addressing and other data that is required to reach it's desired destination

2.2. Body

2.2.1. Contains the actual information/data being sent

2.3. Footer

2.3.1. Contains a few bits that tell the receiving device that the packet has ended, the bits also sometimes check for errors

3. Network topologies

3.1. Bus

3.1.1. Advantages It's quite cheap to set up as less cables are needed Easy to add computers to the network without disconnecting computers

3.1.2. Disadvantages The performance of the network will slow down if more than 10 computers are connected If the main cable fails then the whole network will turn off

3.2. Ring

3.2.1. Advanatges Easy to add new devices to the network Every computer on the network has equal status

3.2.2. Disadvanatges The network cannot be running if extra computers are being added If one computer or cable fails then the whole network fails

3.3. Star

3.3.1. Advanatges If one cable breaks it doesn't stop the network from running Adding extra computers will not slow down the performance of the network

3.3.2. Disadvantages If the central server fails then the whole network fails It's expensive to set up as there's a lot of cabling

3.4. Mesh

3.4.1. Advantages It's faster to send information to others as all the clients are connected If one cable breaks then the overall performance of the network won't change

3.4.2. Disadvantages It's expensive to set up as there's a lot of cabling It's very difficult to manage the network as there are a lot of networks.

4. Protocols

4.1. A set of guidelines for implementing network communication between computers.

4.1.1. Importance Provides rules for packets to communicate over a network.

4.1.2. Different protocols Wi-Fi Allows you to wirelessly communicate over the internet SMTP Simple Mail Transfer Protocol, protocol used for sending and receiving emails FTP File Transfer Protocol, a set of rules for files getting transferred POP3 Post Office Protocols Version 3, used for emails, it's held on the server until you log on HTTP/S HyperText Transfer Protocol/Security, data communication via websites

5. TCP/IP Model