An access control list (ACL) on a router is a feature MOST similar to which type of firewall?

The correct answer is A. Packet filtering firewall. ACLs on routers are essentially a way to filter network traffic based on various criteria, such as IP addresses, ports, or protocols. They work by either allowing or denying packets based on the rules defined in the list, much like how a packet filtering firewall operates. Packet

Submitted by fernanda_arg· Mar 5, 2026Communication and Network Security

Question

Options

APacket filtering firewall
BApplication gateway firewall
CHeuristic firewall
DStateful firewall

How the community answered

(17 responses)

A
88% (15)
B
6% (1)
C
6% (1)

Explanation

ACLs on routers are essentially a way to filter network traffic based on various criteria, such as IP addresses, ports, or protocols. They work by either allowing or denying packets based on the rules defined in the list, much like how a packet filtering firewall operates. Packet filtering firewalls examine packets at the network layer (Layer 3) and sometimes at the transport layer (Layer 4), checking the header information (e.g., IP addresses, port numbers, and protocols). If the packet matches a rule in the ACL, it is allowed; if not, it is denied. This is similar to how ACLs function on a router, where traffic is filtered based on predefined rules.

Topics

#Access Control List#ACL#packet filtering firewall#network security

Community Discussion

No community discussion yet for this question.

Full CISSP Practice