Computer Networking
You are working with a network that is 172.16.0.0 and would like to have the maximum number of hosts per subnet. This assumes support for eight subnets. What subnet mask should you use?

255.255.240.0
255.255.192.0
255.255.224.0
255.255.248.0
255.255.255.0

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Computer Networking
The data-link layer, in reference to the OSI model, specifies

the virtual circuit interface to packet-switched service
None of these
All of these
data link procedures that provide for the exchange of data via frames that can be sent and received
the interface between the X.25 network and packet mode device

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Computer Networking
CSMA (Carrier Sense Multiple Access) is

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

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Computer Networking
Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as size increases.

Cable terminators do not reflect the signal properly
"Line echo" occurs due to the impedance of the cable
Repeaters cannot increase the signal strength sufficiently
Network collisions occur
Cable terminators do not absorb the signal properly

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