Computer Networking
Which of the following is the valid host range for the subnet on which the IP address 192.168.168.188 255.255.255.192 resides?

192.168.168.128-192
192.168.168.129-190
192.168.168.128-190
192.168.168.129-191

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Computer Networking
A WATS arrangement

is less expensive than flat-rate service only when the number of calls is large and the duration of each is short
None of these
is always less expensive than flat-rate service
is never less expensive than flat-rate service
is less expensive than flat-rate service only when the number of calls is small and the duration of each is long

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