Computer Networking
You are working with a class C network. You are required to configure it for five subnets, each of which will support 25 nodes. What subnet should you use?

255.255.255.252
255.255.255.240
255.255.255.0
255.255.255.248
255.255.255.224

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Computer Networking
X.21 is

None of these
a very common bit-oriented data link protocol issued by ISO
network access standard for connecting stations to a circuit-switched network
a method access control technique for multiple-access transmission media
a method of determining which device has access to the transmission medium at any time

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