Computer Networking
You have a network with a subnet of 172.16.17.0/22. Which is the valid host address?

172.16.17.1 255.255.255.252
172.16.0.1 255.255.240.0
172.16.18.255 255.255.252.0
172.16.20.1 255.255.254.0

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Computer Networking
ICMP (Internet Control Message Protocol) is

None of these
a TCP/IP high level protocol for transferring files from one machine to another
a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
a protocol used to monitor computers
a protocol that handles error and control messages

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