Witch access list entry checks for an ACK within a packet header?

Posted by: Pdfprep Category: 300-101 Tags: , ,

Witch access list entry checks for an ACK within a packet header?
A . access-list 49 permit ip any any eq 21 tcp-ack
B . access-list 49 permit tcp any any eq 21 tcp-ack
C . access-list 149 permit tcp any any eq 21 established
D . access-list 49 permit tcp any any eq 21 established

Answer: C

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