ACL Concepts

What is the primary purpose of an Access Control List (ACL)?

To provide IP address management

To filter network traffic

To route packets between different subnets

To encrypt data transmissions

Which type of ACL only filters traffic based on the source IP address?

Extended ACL

Standard ACL

Named ACL

Reflexive ACL

In a Cisco router, what is the range of numbers for standard ACLs?

100-199 and 2000-2699

1-100 and 2000-2699

100-299 and 1300-1999

1-99 and 1300-1999

Which type of ACL can filter traffic based on both source and destination IP addresses, as well as protocols and ports?

Standard ACL

Extended ACL

Named ACL

Reflexive ACL

What command is used to create a named ACL on a Cisco router?

Access-list

Ip access-list standard

Ip access-list extended

Ip access-group

In an ACL entry, what does the ` permit ` keyword indicate?

The ACL entry will log the matching traffic

The ACL entry will allow the matching traffic

The ACL entry will deny the matching traffic

The ACL entry will prioritize the matching traffic

Where is the best place to apply a standard ACL to filter traffic from a specific source IP address?

As close to the source as possible

As close to the destination as possible

On the core router

On the distribution switch

Which of the following statements is true about ACLs and implicit deny?

Every ACL has an implicit ` permit all ` at the end

Every ACL has an implicit ` deny all ` at the end

Implicit deny is optional in ACLs

Implicit deny only applies to extended ACLs

How can you view the configured ACLs on a Cisco router?

Show ip acl

Display access-list

Show access-lists

List access-lists

Which ACL feature allows temporary openings in the firewall to permit return traffic for sessions initiated from within the network?

Standard ACL

Extended ACL

Reflexive ACL

Named ACL

Which command is used to apply an ACL to an interface in Cisco IOS?

Access-group in

Ip access-list in

Ip access-group in

Interface access-group in

ACL Concepts

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