What is the Objective of Networking?

What is the Objective of Networking?Communication between applications on different computers
Must understand application needs/demands
Traffic data rate
Traffic pattern (bursty or constant bit rate)
Traffic target (multipoint or single destination, mobile or fixed)
Delay sensitivity
Loss sensitivity

Four Steps to NetworkingCommunicating across a link

Connecting together multiple links (internetworking)

Finding and routing data to nodes on internetwork

Matching application requirements

Packet Routing/DeliveryEach network technology has different local delivery methods
Address resolution provides delivery information within network
E.g., ARP maps IP addresses to Ethernet addresses
Local, works only on a particular network
Routing protocol provides path through an internetwork