Unit 1.4 (Networking)

Unit 1.4 (Networking)

1. WAN

   • Wide Access Network
   • Biggest geographical area
     • Bank Networks
   • External hardware & infrastructure

2. Ethernet

   • Known as a twisted pair

3. Fibre Optic

   • Very fast cable but also more expensive

4. Coaxial Cable

   • An older networking standard

5. LAN

   • Local Area Network
   • Small geographical area
     • School
     • Home
   • Own infrastructure

6. The Arpanet was the first ever network

7. DNS

   • Domain Name Server
     • Once the IP is found it will store the DNS in its local cache and pass information to the browser
   • Without out a DNS server we would have to type in the IP adress to access a webpage such as: 234.123.43.42

8. Router

   • It is the brains
   • The switch connects things, it is responsible for distributing information between devices
     • A switch sends traffic
     • It is built in
   • A modem converts analogue to digital signals and vice versa

9. Packets

   • Data transmitted over a network is broken down into packets
     • The packets will contain a sequence number
     • Each packet contains the address of the sender and the address of the receiver (IP)