Computer Science Section 1 Mind Map

TCP/IP Stack
1. It is a complete set of networking protocols.
2. It is the most common protocol and consists of 4 layers
3. Examples are http, ftp, POP3, SMTP, telnet.
4. A TCP/IP stack is, roughly spoken, a piece of software for communicating with other network devices.
DNS
1. Domain name system
2. Helps computers exchange data through the internet.
3. Which manages a massive database that sources domain names to IP addresses.
4. Computers use DNS servers to look for domain names you are trying to access.
LANs & WANs
1. WAN - Wide are network
2. LAN - Local are network
3. LAN - is very quick however it is limited to a small area.
4. WAN - Larger shared area however it costs a lot and it is not very fast.
5. LAN - Advantages; Data can be shared easily, Central backup, Message, software can be shared, stored in a central place.
6. LAN - Disadvantages; Printing can be slow, Virus can be spread easily, Greater need for secutiry, If server fails all workstations will fail, Cost, Cable damage affects computers.
7. WAN - Advantages; There is a wider scale, Far greater, Can be world wide.
8. WAN - Disadvantages; Security is even more important, vulnerable to hackers, Easy to intercept data such as bank details and addresses.
Packet and Circuit switching
1. Packet switching moves data in separate small blocks
2. When packets are received they are reassembled in the proper sequence to make up the message

Resource summary

	Created by Harman Rai over 8 years ago