Computer Networking
Which fields are contained within an IEEE Ethernet frame header?1. Source and destination MAC address2. Source and destination network address3. Source and destination MAC address and source and destination network address4. FCS field

3 only
2 only
2 and 3 only
1 and 4

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Computer Networking
Bulletin board system

is a public access message system
converts analog signals to digital signals
None of these
is a modem capable of accepting commands
converts digital signals to analog signals

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

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