A video codec has to digitize an analog video signal that is band-limited to 5 MHz. If each sample of the video signal has to be encoded into one of 512 possible levels, and no compression techniques are used, the codec will generate a video bit rate of:
a. 10 Megabits per second
b. 50 Megabits per second
c. 90 Megabits per second
d. 150 Megabits per second
e. 512 Megabits per second
The Grade of Service (or "blocking probability") of an enterprise PBX will be determined by:
a. quality of the line cards on the PBX
b. voice quality of the access lines to the PBX
c. number of voice trunks provisioned on the PBX
d. speed of internal connections of the PBX switch modules
e. type of multiplexing technology used by the PBX
One item from the list below that will most likely not impact the call features provided by an enterprise PBX is:
a. the type of signaling interconnection of the PBX with the PSTN
b. the type of telephone used with the PBX
c. the bit error rate on the access link to PBX
d. the software version used by the PBX
e. the manufacturer's product roll-out plan for the PBX
If a frame passes from a station through two switches, then through a router, then through two more switches, and then to the destination station, how many Ethernet frames will there be in the end-to-end communication?
a. One.
b. Two.
c. Six.
d. Seven.
e. Eight.
e. Cannot be determined - insufficient information
If you have fiber quality of 2000 MHz-Km, how much bandwidth would you have if you used 2 kilometers of the fiber?
a. 400 MHz.
b. 200 MHz.
c. 4 GHz.
d. 2 GHz.
e. None of the above.