CIS 527

Lab 3 - Networking Overview

Image Source: Wikipedia

Image Source: Wikipedia

7 Layer OSI Model

Image Source: Jordan Head on StackExchange

Data Transmission

Image Source: TCP/IP Guide

Encapsulation

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Physical - 1000BASE-T

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Data Link - Ethernet

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Media Access Control (MAC) Address

• Physical Address of a Network Device
• Identifies Devices at Layer 2
• 48-bit Address
• Example: 1a:2b:3c:d4:e5:f6
• Set by Manufacturer
• Can be Changed by User

Routing

• Find Best Path from Point to Point on Network
• Prevent Loops
• Allow for Redundant Links
• Uses Variant of Spanning Tree Algorithm

Virtual LAN (VLAN)

• Partition a Single Layer 2 Network
• Each Partition is Isolated
• Simplify Network Design
• Group Items by Function, Not Location

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What's Next?

• Layer 3: Network (IP)
• Layer 4: Transport (TCP/UDP)
• Layers 5-7: Application Protocols (HTTP, SNMP, etc.)