Wired and Wireless Networks 1.4

Wired and Wireless Networks 1.4

1. Computer Network - A telecommunication network allowing computers to exchange data (share files) via a data link

2. LAN (Local Area Network)

   • Covers a small geographical area
   • Quite fast (100-1000 megabits per second)
   • Cheap
   • Used in Schools, Classes, Offices etc.
   • LANs are normally owned by the user
   • The Internet is a WAN

3. WAN (Wide Area Network)

   • Covers a large geographical area
   • Quite slow (Up to 150 megabits per second)
   • Expensive
   • Used in Universities, Large Companies etc.
   • Might not own the WAN you use

4. Bottleneck - A wiring cabinet connected by one cable (causing traffic)

   • Can be fixed by using Fibre Optic

5. Ethernet Cables - Network Cable used to connect devices together

   • CAT5 & CAT6 (Category)

6. Router- Also known as the brain.

   • networking device that forwards data packets between computer networks
   • A router is connected to two or more data lines from different networks.
   • The most familiar type of routers are home and small office routers that simply forward IP packets between the home computers and the Internet.

7. NIC- Network interface card

   • A hardware device internal to a computer that allows a computer to connect to a network

8. Transmission control protocol- one of the main protocols of the Internet protocol suite.

   • Fibre optic cable
   • coaxial cable

9. WAP-A device that allows other devices to connect to a network using standard such as wifi and bluetooth

10. switch- Filter and forwards data packets

11. CLOUD

    • collection of servers
      • stores data
      • runs applications

12. Packets

    • Ip address
    • sequence number
    • reciever
    • sender

13. DNS - domain name server

14. VPN- Virtial private network

15. Hosting- 2 url can have some ip address

16. Ip- Address change everyday for security static ip address- printer, server, router