Transcript CCNA 1 Module 11 TCP/IP Transport and Application Layers
CCNA 2 v3.1 Module 11 Access Control Lists (ACLs)
© 2004 Cisco Systems, Inc. All rights reserved.
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Purpose of This PowerPoint
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This PowerPoint primarily consists of the Target Indicators (TIs) of this module in CCNA version 3.1.
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It was created to give instructors a PowerPoint to take and modify as their own.
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This PowerPoint is: NOT a study guide for the module final assessment.
NOT a study guide for the CCNA certification exam.
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Please report any mistakes you find in this PowerPoint by using the Academy Connection Help link.
© 2004, Cisco Systems, Inc. All rights reserved.
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Objectives
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What are ACLs?
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ACLs are lists of conditions used to test network traffic that tries to travel across a router interface. These lists tell the router what types of packets to accept or deny.
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How ACLs Work
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Protocols with ACLs Specified by Numbers
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Creating ACLs
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The Function of a Wildcard Mask
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Verifying ACLs
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There are many show commands that will verify the content and placement of ACLs on the router.
show ip interface show access-lists Show running-config
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Standard ACLs
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Extended ACLs
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Named ACLs
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Placing ACLs
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Standard ACLs should be placed close to the destination.
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Extended ACLs should be placed close to the source.
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Firewalls A firewall is an architectural structure that exists between the user and the outside world to protect the internal network from intruders.
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Restricting Virtual Terminal Access
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Summary
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