By default, which of the following ports would a network need to have opened to allow for thetransmission of incoming and outgoing email?（） (Select TWO).

A. Identity symptoms and problems
B. Document the process and solutions
C. Establish the most probable cause
D. Escalate if necessary.

A.QoS
B.Trunking
C.Spanning
D.VoIP

A.10.0.10.1
B.1A-23-F9-CD-06-9L
C.1A-23-F9-CD-06-9B
D.1A-23-F9-CD-06-9B-23-5C