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Questions and Answers
What is the suggested approach when configuring a complex ACL?
What is the suggested approach when configuring a complex ACL?
- Configure the ACL directly on the device without prior planning.
- Write the ACL commands on a piece of paper.
- Use a text editor and write out the specifics of the policy to be implemented. (correct)
- Create the ACL using graphical user interface tools.
What is the purpose of using sequence numbers when editing existing standard IPv4 ACLs?
What is the purpose of using sequence numbers when editing existing standard IPv4 ACLs?
- To increase the size of the ACL.
- To randomize the order of the ACL entries.
- To track and manage the order of the ACL entries. (correct)
- To decrease the size of the ACL.
What should be included when creating an ACL to secure VTY access?
What should be included when creating an ACL to secure VTY access?
- Configuration commands for securing SNMP access
- Commands to secure physical access to devices
- Configuration commands for securing console access
- Remarks to document the ACL (correct)
What is the purpose of configuring extended IPv4 ACLs?
What is the purpose of configuring extended IPv4 ACLs?
What is the recommended approach when creating an ACL?
What is the recommended approach when creating an ACL?
What is the purpose of including remarks when creating an ACL?
What is the purpose of including remarks when creating an ACL?
What is the number range for creating a numbered standard IPv4 ACL?
What is the number range for creating a numbered standard IPv4 ACL?
Which command is used to create a named standard IPv4 ACL?
Which command is used to create a named standard IPv4 ACL?
What is the purpose of the 'source-wildcard' in a numbered standard IPv4 ACL?
What is the purpose of the 'source-wildcard' in a numbered standard IPv4 ACL?
How is a numbered or named standard IPv4 ACL linked to an interface or feature?
How is a numbered or named standard IPv4 ACL linked to an interface or feature?
What does the 'no access-list access-list-number' global configuration command do?
What does the 'no access-list access-list-number' global configuration command do?
In the context of ACLs, what does the term 'deny' signify?
In the context of ACLs, what does the term 'deny' signify?
What is the significance of capitalizing ACL names when creating a named standard IPv4 ACL?
What is the significance of capitalizing ACL names when creating a named standard IPv4 ACL?
What does the 'ip access-group' command do in the context of ACLs?
What does the 'ip access-group' command do in the context of ACLs?
What should be done first to remove an ACL from an interface?
What should be done first to remove an ACL from an interface?
What does the show ip interface command verify in relation to ACLs?
What does the show ip interface command verify in relation to ACLs?
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Study Notes
Configuring ACLs
- When configuring a complex ACL, the suggested approach is to start with a simple ACL and gradually add more rules to it.
Sequence Numbers
- Sequence numbers are used when editing existing standard IPv4 ACLs to insert, delete, or modify a rule in the ACL.
Securing VTY Access
- When creating an ACL to secure VTY access, it should include rules that restrict access to the VTY lines.
Extended IPv4 ACLs
- Configuring extended IPv4 ACLs allows for filtering based on source and destination IP addresses, ports, and protocols.
Creating ACLs
- The recommended approach when creating an ACL is to start with a simple ACL and gradually add more rules to it.
Including Remarks
- Remarks should be included when creating an ACL to provide documentation and clarity for the ACL.
Numbered Standard IPv4 ACLs
- The number range for creating a numbered standard IPv4 ACL is 1-99.
- The command used to create a named standard IPv4 ACL is
ip access-list standard. - The
source-wildcardin a numbered standard IPv4 ACL specifies the source IP address and wildcard mask.
Linking ACLs to Interfaces or Features
- A numbered or named standard IPv4 ACL is linked to an interface or feature using the
ip access-groupcommand.
Deleting ACLs
- The
no access-list access-list-numberglobal configuration command deletes an ACL. - To remove an ACL from an interface, the ACL should be deleted from the running configuration first.
ACL Terms
- In the context of ACLs, the term 'deny' signifies blocking or rejecting traffic.
Named Standard IPv4 ACLs
- Capitalizing ACL names when creating a named standard IPv4 ACL is important for clarity and readability.
ip access-group Command
- The
ip access-groupcommand is used to link an ACL to an interface or feature.
Verifying ACLs
- The
show ip interfacecommand verifies whether an ACL is applied to an interface.
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