Which of the following primarily uses guided media?

Select one:

a. cellular telephone system

b. satellite communications

c. radio broadcasting

d. local telephone system

The physical address:

Select one:

a. depends on the network.

b. All of the above

c. changed when frames move from one hope to another

d. uses columns in it's representation

A system can produce frequencies [1000 5000] Hz. Assume we need to convert the signal into digital signal using PCM, what is the min sampling rate?

Select one:

a. 8000

b. 15000

c. 3000

d. 4000

If a system that operates at 1000 baud has 16 signal levels, how many bits the system can transfer per second?

Select one:

a. 125 bps

b. 2000 bps

c. 8000 bps

d. 4000 bps