 |
1 | |
If an FDMA network has eight stations, the medium bandwidth has _______
bands. |
|
| | A) | 1 |
| | B) | 2 |
| | C) | 8 |
| | D) | 16 |
|
2 | |
In the _______ random-access method there is no collision. |
|
| | A) | CSMA/CD |
| | B) | CSMA/CA |
| | C) | ALOHA |
| | D) | Token-passing |
|
3 | |
In the 1-persistent approach, when a station finds an idle line, it _______. |
|
| | A) | Sends immediately |
| | B) | Waits 0.1 s before sending |
| | C) | Waits 1 s before sending |
| | D) | Waits a time equal to 1 - p before sending |
|
4 | |
_______ requires one primary station and one or more secondary stations. |
|
| | A) | Token ring |
| | B) | Reservation |
| | C) | Polling |
| | D) | CSMA |
|
5 | |
In the p-persistent approach, when a station finds an idle line, it _______. |
|
| | A) | Sends immediately |
| | B) | Waits 1 s before sending |
| | C) | Sends with probability 1 - p |
| | D) | Sends with probability p |
|
6 | |
A network using the CSMA random-access method with p equal to 0.25 will send _______ percent of the time after accessing an idle line. |
|
| | A) | 50 |
| | B) | 75 |
| | C) | 100 |
| | D) | 25 |
|
7 | |
The 1-persistent approach can be considered a special case of the p-persistent approach with p equal to _______. |
|
| | A) | 1.0 |
| | B) | 2.0 |
| | C) | 0.1 |
| | D) | 0.5 |
|
8 | |
_______ is a random-access protocol. |
|
| | A) | FDMA |
| | B) | CDMA |
| | C) | MA |
| | D) | Polling |
|
9 | |
In the reservation access method, if there are 10 stations on a network, then there are _______ reservation minislots in the reservation frame. |
|
| | A) | 10 |
| | B) | 11 |
| | C) | 5 |
| | D) | 9 |
|
10 | |
A Walsh table for 16 stations has a chip sequence of _______ chips. |
|
| | A) | 16 |
| | B) | 32 |
| | C) | 4 |
| | D) | 8 |
|
11 | |
_______ is a controlled-access protocol. |
|
| | A) | FDMA |
| | B) | TDMA |
| | C) | CSMA |
| | D) | Reservation |
|
12 | |
_______ is (are) a channelization protocol. |
|
| | A) | FDMA |
| | B) | TDMA |
| | C) | CDMA |
| | D) | All the above |
|
13 | |
_______ is the access protocol used by traditional Ethernet. |
|
| | A) | Token ring |
| | B) | CSMA |
| | C) | CSMA/CD |
| | D) | CSMA/CA |
|
14 | |
The most primitive random access method is _______. |
|
| | A) | Channelization |
| | B) | ALOHA |
| | C) | CSMA |
| | D) | Token passing |
|
15 | |
When a collision is detected in a network using CSMA/CD, _______. |
|
| | A) | The frame is immediately resent |
| | B) | The backoff value is decremented by 1 |
| | C) | A jam signal is sent by the station |
| | D) | The backoff value is set to 0 |
|
16 | |
In the _______ random-access method, stations do not sense the medium. |
|
| | A) | CSMA/CA |
| | B) | ALOHA |
| | C) | CSMA/CD |
| | D) | Ethernet |
|
17 | |
When a primary device asks a secondary device if it has data to send, this is called _______. |
|
| | A) | Backing off |
| | B) | Polling |
| | C) | Selecting |
| | D) | Reserving |
|
18 | |
If a TDMA network has eight stations, the medium bandwidth has _______ bands. |
|
| | A) | 1 |
| | B) | 2 |
| | C) | 8 |
| | D) | 16 |
|
19 | |
If a CDMA network has eight stations, the medium bandwidth has _______ bands. |
|
| | A) | 1 |
| | B) | 2 |
| | C) | 8 |
| | D) | 16 |