A network is a system that allows applications to communicate. Can be though of as the network of roads that tie cities, buildings and people together.

Definitions

Network Speed: Default measured in Bits Per Second bps. To get bytes per second, divide by 8.

bit (b): 0 or 1
byte (B): 8 bits
Kilobyte (KB) 1 byte x 1024
megabyte (MB): 1 kilobyte x 1024
gigabyte (GB): 1 megabyte x 1024
terabyte (TB): 1 gigabyte x 1024

Delay: Time required to send data.  Can vary due to distance, network congestion, etc.

Availability:  Based on Network congestion.  (How many people are trying to use it at the same time?)

Types of Networks

Bus (Cable)

Ring (Token Ring)

Star (Most Common)

Questions?

Function of a Network
To provide a method that allows applications to communicate.

Pieces of a Network
NIC, Cables, Switches, Routers, ISP, etc.

Application Examples
FTP, Web Browsing (HTTP), Email, Online gaming.

Network Designs
Ring, Star, Bus