When the angle of incidence is less than

Select one:

a. light crosses the boundary and is reflected

b. none of the above

c. light does not cross the boundary

d. light crosses the boundary and is refracted

in order to transmit 3 bits, we need ------------------- levels.

Select one:

a. 9

b. 3

c. 6

d. 8

In block coding, if k = 2 and n = 3, we have _______ invalid codewords.

Select one:

a. 125

b. 25

c. 4

d. 8

order the following cables from high to less immunity to noise:

Select one:

a. STP,TP, Coax

b. Coax, STP,TP

c. TP, STP, Coax

d. Coax, TP, STP

Consider a transmission medium that has a bandwidth of 3 KHz, an average signal power of 150 units and an average noise power of 10 units

Select one:

a. 90000 bps

b. 12000 bps

c. 450000 bps

d. 30000 bps