ACIT 2620

Principles of Enterprise Networking

By: Yves Rene Shema

What is a network?

Network

• Collection of nodes connected by some type of transmission media or link, for the purpose of sharing services, devices or data (i.e. networked resources)

Node

• Any device that can communicate over the network and is identified by a unique identifying number, known as its network address.

Link

Resource Control

Client-server Networks

Peer-to-peer Networks

Protocols

• Mutually agreed upon rules for communication
• Define the format, order of messages sent and received among network entities, and actions taken upon transmission, receipt, and timeout
• Govern all communication activity on the internet

Example Protocols

Layered networking model

Encapsulation

Protocol Data Units (PDU)