ACIT 2620

Principles of Enterprise Networking

By: Yves Rene Shema

Objectives:

• Recap of OSI Model
• Survey of networking devices
• Overview of common network topologies
• Project setup

OSI Model Recap

(7) Application: domain specific messages
(6) Presentation: data formatting (e.g. encryption, compression, character encoding)
(5) Session: organizing of messages into "visits"
(4) Transport: multiplexing, segmentation, re-assembly
(3) Network: routing datagrams between networks, global addressing
(2) Data-Link: communication on shared medium
(1) Physical: signals across medium (bits)

Broadcast Domain vs Collision Domain

A broadcast domain is a group of nodes sharing the same transmission medium (i.e. LAN or simply network). When these nodes are not connected through a switch (or bridge), the network constitutes a single collision domain.

Network Devices

Define the function and uppermost OSI layer implemented by the following devices:

• Network Interface Controller/Card
• Hub
• Bridge
• Switch

• Router
• NAT Router
• Wireless Access Point (WAP)
• Firewall

Network Topologies

• Bus
• Ring
• Star
• Mesh
• Hybrid

Reading List

Read this before next class:

• Ethernet Fundamentals
• Ethernet Basics
• Optional:
  • VIM basics (or just type vimtutor in a linux terminal and follow along)
  • A tcpdump Tutorial with Examples