_______ is a section in a DNS message.
A) Header
B) Question
C) Authority
D) All of the above
Correct Answer:
Verified
Q17: SMTP is limited to the conversation that
Q18: Some e-mail systems only serve users on
Q19: DNS allows essentially unlimited levels and uses
Q20: The _ relays mail for one application-level
Q21: _ are programs that extract information from
Q23: _ are server programs that hold information
Q24: A _ is a facility that may
Q25: The _ is like a packet switch
Q26: HTTP is _ .
A)a transaction-oriented client/server protocol
B)a
Q27: _ is an Internet standard defined in
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