Overview

Introduction

Welcome to the Configure Switching Concepts Practice Lab. In this module, you will be provided with the instructions and devices needed to develop your hands-on skills.

Learning Outcomes

In this module, you will complete the following exercises:

  • Exercise 1 - Examining the functionality of a Switch
  • Exercise 2 - Examining the MAC Address Table
  • Exercise 3 - Examining MAC Address Aging
  • Exercise 4 - Frame Flooding
  • Exercise 5 - Creating and Managing VLANs

After completing this lab, you will be able to:

  • Explain the functionality of a switch
  • Examine switch interface information and operations
  • Explain how the MTU functions
  • Explain how a switch learns MAC addresses
  • Adjust the default MAC address aging timer
  • Explain frame flooding, how it works and the vulnerabilities
  • Create and manage VLANs

Exam Objectives

The following exam objectives are covered in this lab:

  • N10-007 1.3: Explain the concepts and characteristics of routing and switching (Properties of network traffic, Broadcast domains)
  • N10-007 1.3: Explain the concepts and characteristics of routing and switching (Properties of network traffic, CSMA/CD)
  • N10-007 1.3: Explain the concepts and characteristics of routing and switching (Properties of network traffic, Collision domains)
  • N10-007 1.3: Explain the concepts and characteristics of routing and switching (Properties of network traffic, MTU)
  • N10-007 1.3: Explain the concepts and characteristics of routing and switching (Properties of network traffic, Broadcast)
  • N10-007 1.3: Explain the concepts and characteristics of routing and switching (Segmentation and interface properties, LANs)
  • N10-007 1.3: Explain the concepts and characteristics of routing and switching (Segmentation and interface properties, Trunking (802.1q))
  • N10-007 1.3: Explain the concepts and characteristics of routing and switching (Segmentation and interface properties, Tagging and untagging ports)
  • N10-007 1.3: Explain the concepts and characteristics of routing and switching (Segmentation and interface properties, MAC address table)
  • N10-007 1.5: Compare and contrast the characteristics of network topologies, types, and technologies (Types, LAN)
  • N10-007 2.2: Given a scenario, determine the appropriate placement of networking devices on a network and install/configure them (Switch)
  • N10-007 2.2: Given a scenario, determine the appropriate placement of networking devices on a network and install/configure them (Hub)
  • N10-007 2.2: Given a scenario, determine the appropriate placement of networking devices on a network and install/configure them (Bridge)
  • N10-007 4.4: Summarize common networking attacks (DoS, VLAN hopping)
  • N10-007 4.6: Explain common mitigation techniques and their purposes (Network segmentation, VLAN)

Lab Duration

It will take approximately 1 hour to complete this lab.

Exercise 1 - Examining the Functionality of a Switch

A switch is a networking device that connects many devices together on a computer network. It uses packet switching to receive, process and forwards data to destination devices. A switch differs from a hub and a bridge in that it forwards data only to the devices that need to receive it rather than broadcasting received data on all of its ports and letting the devices decide what data they need and what data to discard.

Learning Outcomes

After completing this exercise, you will be able to:

  • Explain the functionality of a switch
  • Examine switch interface information and operations
  • Explain how the MTU functions

Exercise 2 - Examining the MAC Address Table

The MAC Address Table, also known as the Content Addressable Memory table, or CAM table, is a data structure that is created and maintained by a switch to keep track of which end-device MAC addresses are associated with which switch port. The purpose of the MAC table is to allow the switch to perform the most fundamental function that distinguishes it from a hub: to create one collision domain per interface.

Learning Outcomes

After completing this exercise, you will be able to:

  • Explain how a switch learns MAC addresses

Exercise 3 - Examining MAC Address Aging

Dynamically learned MAC addresses remain in the MAC address table for a specific period of time. If there is no activity from the specific MAC address after this specified period of time, the address is removed from the table. This is why in some of your output you may have had a different number of MAC addresses corresponding to an interface at any one time.

Learning Outcomes

After completing this exercise, you will be able to:

  • Adjust the default MAC address aging timer

Exercise 4 - Frame Flooding

Frame flooding occurs when a frame enters a switch that doesn’t have the destination MAC address within the MAC table. If this is the case, the switch does not know where to send the frame, so it sends it out all ports except the port from which the frame entered the switch. This is frame flooding. If the device with the destination MAC address in question is connected to one of the switch’s ports, it will answer, and its MAC address will be added to the MAC table.

Learning Outcomes

After completing this exercise, you will be able to:

  • Explain frame flooding, how it works and the vulnerabilities

Exercise 5 - Creating and Managing VLANs

VLANs are an important part of your network design and are an indispensable tool to make your network versatile and secure.

Learning Outcomes

After completing this exercise, you will be able to:

  • Create and manage VLANs

Comprehensive Learning

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