Stateful firewalls are designed to keep track of the state of network connections and use this information to make decisions about whether to allow or block traffic. While stateful firewalls provide more advanced security features than ACLs, they are not the most similar to ACLs on a router. This is because ACLs are typically used to control access to network resources based on more basic criteria, such as IP address and port number, whereas stateful firewalls are more focused on the state of a connection. Therefore, the most similar type of firewall to an ACL on a router is a packet filtering firewall.
It's B, but router can also utilize ACLs that are stateful.
That's the function of extended ACLs on a Cisco router for example.
It' a feature that's well beyond decade old.
Network ACLs are stateless: This means any changes applied to an incoming rule will not be applied to the outgoing rule. If you allow an incoming port 22, you would also need to apply the rule for outgoing traffic.
You are correct and after reading into the question more, I believe the answer to be B.
upvoted 2 times
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