CompTIA A+ 220-902 Question J-98

An administrator has taken steps to secure a SOHO wired network, but as a result the users report that they can no longer access the Internet but can still see other computers on the network. Which of the following would have caused this issue?

A. Port 80 has been disabled
B. Port 3389 has been enabled
C. MAC filtering has been enabled
D. LDAP has been disabled

Correct Answer: A

Explanation:
http://en.wikipedia.org/wiki/TCP_port