Question
Which of the following protocols utilize UDP as the layer 4 transport mechanism?
(Choose all that apply)


A. TACACS


B. Telnet


C. SMTP


D. SNMP


E. HTTP


F. TFTP
Answers
D, F
Explanation:
SNMP and TFTP use UDP as the transport mechanism. Generally speaking, protocols that use the keywords "trivial" or "simple" uses UDP, since connectionless, best effort delivery mechanism usually suffice. SNMP uses UDP port 161, while TFTP uses UDP port 69.
Incorrect Answers:


A. TACACS uses TCP port 49


B. Telnet uses TCP port 23


C. SMTP uses TCP port 25


E. HTTP uses TCP port 80   Your Comment




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