ENSA 4.1.1-4.1.2 -- ACLs

What is the primary function of an Access Control List (ACL) on a router?

• To encrypt data packets

• To filter packets based on information in the packet header

• To increase the speed of packet transmission

• To store routing information

Why is it important for a router to evaluate network packets when an ACL is applied to an interface?

• To ensure packets are encrypted

• To determine if the packet can be forwarded

• To increase the bandwidth of the network

• To reduce the number of packets

What happens if no ACL is configured on a router interface by default?

• All packets are denied

• All packets are forwarded

• Only encrypted packets are forwarded

• Only packets with a specific IP are forwarded

Which of the following best describes an Access Control Entry (ACE)?

• A command to encrypt data

• A sequential list of permit or deny statements

• A routing protocol

• A type of network interface

In what way can ACLs impact the performance of a network?

• By increasing the speed of packet forwarding

• By slowing down packet processing

• By reducing the number of packets sent

• By increasing the bandwidth available

What strategic considerations should be made when configuring ACLs on a network?

• Ensuring all traffic is allowed

• Determining which traffic should be permitted or denied

• Maximizing the number of ACEs

• Minimizing the use of routing protocols

Packet filtering can occur at which layers?

• Layer 3

• Layer 4

• Layer 5

• Layer 1

Standard ACLs filter . . .

(choose 2)

• at L3

• using the source IPV4 address only

• at L4

• using the source and/or destination IPv4 address

Extended ACLs filter using TCP and UDP ports at layer . . .

• L2

• L3

• L4

• L5

Extended ACLs filter using source and or destination IPv4 addresses at layer . . .

• L2

• L3

• L4

• L5