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6 Cards in this Set

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What are access lists used forced?

Used to filter traffic that passes through a router



ACL filters packets by looking at the IP, TCP, and UDP headers in the packet

What are the key features for Cisco ACL?

Packets can be filtered as they enter an interface




Packets can be filtered before they exit an interface




Deny is the term used in Cisco IOS to block a packet at the interface that is doing the filtering




Permit is the term used in Cisco IOS to allow a packet through the interface that is doing the filtering




At the end of every ACL is an implied “deny all traffic” statement. Therefore, if a packet does not match any of your access list statements, it is blocked

What are the two types of access lists?

Standard




Extended

What is the difference between the two access lists?

Standard(Examines only source IP)




Extended(Examines the source and destination IP + Port Number)

Is this an example of of extended or standard ACL?




“access-list 1 permit 172.16.0.0 0.0.255.255”

Standard

Is this an example of of extended or standard ACL?




“access-list 101 permit tcp 172.16.0.0 0.0.255.255 165.33.15.0 0.0.0.255 eq 23”

Extended