In order to prevent particular ports and applications from getting packets into an organization, what does a firewall check?
A. Network layer headers and the session layer port numbers
B. Presentation layer headers and the session layer port numbers
C. Application layer port numbers and the transport layer headers
D. Transport layer port numbers and application layer headers
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D. Transport layer port numbers and application layer headers
George, you are a Genius!
BTW; how come mary didn’t answer on this one?
You can deduct the answer by eliminating A, B and C. There are no session or appication layer ports. Ports exist on transport layer.