Which of the following uses classless subnet masks across a network?
Answer(s): B
Which of the following records allows for reverse DNS lookups?
Answer(s): C
Which of the following routing protocols can be utilized as both an IGP and EGP?
Answer(s): A
Which of the following ports should be allowed through a firewall to allow DNS resolution to occur to an outside DNS server?
Which of the following networking devices can exist at several layers of the OSI model at the same time? (Select TWO).
Answer(s): A,D
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