|
1 | | IEEE has defined the specifications for a wireless LAN, called _______, which covers the physical and data link layers. |
|
| | A) | IEEE 802.3 |
| | B) | IEEE 802.5 |
| | C) | IEEE 802.11 |
| | D) | IEEE 802.2 |
|
2 | | In IEEE 802.11, a ___ is made of stationary or mobile wireless stations and an optional central base station, known as the access point (AP). |
|
| | A) | ESS |
| | B) | BSS |
| | C) | CSS |
| | D) | none of the above |
|
3 | | In IEEE 802.11, a BSS without an AP is called an _________. |
|
| | A) | an ad hoc architecture |
| | B) | an infrastructure network |
| | C) | either (a) or (b) |
| | D) | neither (a) nor (b) |
|
4 | | In IEEE 802.11, a BSS with an AP is sometimes referred to as ____________. |
|
| | A) | an ad hoc architecture |
| | B) | an infrastructure network |
| | C) | either (a) or (b) |
| | D) | neither (a) nor (b) |
|
5 | | In IEEE 802.11, communication between two stations in two different BSSs usually occurs via two ________. |
|
| | A) | BSSs |
| | B) | ESSs |
| | C) | APs |
| | D) | none of the above |
|
6 | | In IEEE 802.11, a station with ________ mobility is either stationary (not moving) or moving only inside a BSS. |
|
| | A) | no-transition |
| | B) | BSS-transition |
| | C) | ESS-transition |
| | D) | none of the above |
|
7 | | In IEEE 802.11, a station with ________mobility can move from one BSS to another, but the movement is confined inside one ESS. |
|
| | A) | no-transition |
| | B) | BSS-transition |
| | C) | ESS-transition |
| | D) | none of the above |
|
8 | | In IEEE 802.11, a station with ________ mobility can move from one ESS to another. |
|
| | A) | no-transition |
| | B) | BSS-transition |
| | C) | ESS-transition |
| | D) | none of the above |
|
9 | | In IEEE 802.11, _______ is an optional access method that can be implemented in an infrastructure network (not in an ad hoc network). |
|
| | A) | DCF |
| | B) | PCF |
| | C) | either (a) or (b) |
| | D) | neither (a) nor (b) |
|
10 | | In IEEE 802.11, when a frame is going from one station in a BSS to another without passing through the distribution system, the address flag is _____ |
|
| | A) | 00 |
| | B) | 01 |
| | C) | 10 |
| | D) | 11 |
|
11 | | In IEEE 802.11, when a frame is coming from an AP and going to a station, the address flag is _______. |
|
| | A) | 00 |
| | B) | 01 |
| | C) | 10 |
| | D) | 11 |
|
12 | | In IEEE 802.11, when a frame is going from a station to an AP, the address flag is _____. |
|
| | A) | 00 |
| | B) | 01 |
| | C) | 10 |
| | D) | 11 |
|
13 | | In IEEE 802.11, when a frame is going from one AP to another AP in a wireless distribution system, the address flag is _____ |
|
| | A) | 00 |
| | B) | 01 |
| | C) | 10 |
| | D) | 11 |
|
14 | | The IEEE 802.11 standard for wireless LANs defines two services: ______ and _______. |
|
| | A) | BSS; ASS |
| | B) | ESS; SSS |
| | C) | BSS; ESS |
| | D) | BSS; DCF |
|
15 | | In IEEE 802.11, the access method used in the DCF sublayer is _________. |
|
| | A) | ALOHA |
| | B) | CSMA/CA |
| | C) | CSMA/CD |
| | D) | none of the above |
|
16 | | In IEEE 802.11, the access method used in the PCF sublayer is ______. |
|
| | A) | contention |
| | B) | controlled |
| | C) | polling |
| | D) | none of the above |
|
17 | | In IEEE 802.11, the ______ is a timer used for collision avoidance. |
|
| | A) | NAV |
| | B) | BSS |
| | C) | ESS |
| | D) | none of the above |
|
18 | | In IEEE 802.11, the MAC layer frame has ______ fields. |
|
| | A) | four |
| | B) | five |
| | C) | six |
| | D) | none of the above |
|
19 | | In IEEE 802.11, the addressing mechanism can include up to ______addresses. |
|
| | A) | four |
| | B) | five |
| | C) | six |
| | D) | none of the above |
|
20 | | The original IEEE 802.11, uses _________. |
|
| | A) | FHSS |
| | B) | DSSS |
| | C) | OFDM |
| | D) | either (a) or (b) |
|
21 | | The IEEE 802.11a, uses _________. |
|
| | A) | FHSS |
| | B) | DSSS |
| | C) | OFDM |
| | D) | either (a) or (b) |
|
22 | | The IEEE 802.11b, uses _________. |
|
| | A) | FHSS |
| | B) | DSSS |
| | C) | OFDM |
| | D) | either (a) or (b) |
|
23 | | The IEEE 802.11g, uses _________. |
|
| | A) | FHSS |
| | B) | DSSS |
| | C) | OFDM |
| | D) | either (a) or (b) |
|
24 | | The original IEEE 802.11, has a data rate of _____Mbps. |
|
| | A) | 1 |
| | B) | 6 |
| | C) | 11 |
| | D) | 22 |
|
25 | | IEEE 802.11a, has a data rate of _____Mbps. |
|
| | A) | 1 |
| | B) | 2 |
| | C) | 6 |
| | D) | none of the above |
|
26 | | IEEE 802.11b, has a data rate of _____Mbps. |
|
| | A) | 1 |
| | B) | 2 |
| | C) | 5.5 |
| | D) | none of the above |
|
27 | | IEEE 802.11g, has a data rate of _____Mbps. |
|
| | A) | 1 |
| | B) | 2 |
| | C) | 11 |
| | D) | 22 |
|
28 | | The IEEE 802.11 wireless LANs use ________ types of frames. |
|
| | A) | four |
| | B) | five |
| | C) | six |
| | D) | none of the above |
|
29 | | Bluetooth is a _______ technology that connects devices (called gadgets) in a small area. |
|
| | A) | wired LAN |
| | B) | wireless LAN |
| | C) | VLAN |
| | D) | none of the above |
|
30 | | A Bluetooth network is called a ________. |
|
| | A) | piconet |
| | B) | scatternet |
| | C) | bluenet |
| | D) | none of the above |
|
31 | | In Bluetooth, multiple ________ form a network called a _________. |
|
| | A) | scatternet; piconets |
| | B) | piconets: scatternet |
| | C) | piconets: bluenet |
| | D) | bluenet; scatternet |
|
32 | | A Bluetooth network consists of _____ primary device(s) and up to ____ secondary devices. |
|
| | A) | one; five |
| | B) | five; three |
| | C) | two; six |
| | D) | one; seven |
|
33 | | The RTS and CTS frames in CSMA/CA ____ solve the hidden station problem. The RTS and CTS frames in CSMA/CA ____ solve the exposed station problem. |
|
| | A) | can; cannot |
| | B) | cannot; can |
| | C) | can; can |
| | D) | cannot; cannot |
|
34 | | In Bluetooth, the current data rate is ____Mbps |
|
| | A) | 2 |
| | B) | 5 |
| | C) | 11 |
| | D) | none of the above |
|
35 | | In Bluetooth, the _______ layer is roughly equivalent to the physical layer of the Internet model. |
|
| | A) | radio |
| | B) | baseband |
| | C) | L2CAP |
| | D) | none of the above |
|
36 | | In Bluetooth, the _____layer is roughly equivalent to the MAC sublayer in LANs. |
|
| | A) | radio |
| | B) | baseband |
| | C) | L2CAP |
| | D) | none of the above |
|
37 | | In Bluetooth, the L2CAP sublayer, is roughly equivalent to the LLC sublayer in LANs. |
|
| | A) | radio |
| | B) | baseband |
| | C) | L2CAP |
| | D) | none of the above |
|
38 | | The access method in Bluetooth is ________. |
|
| | A) | FDMA |
| | B) | TDD-TDMA |
| | C) | CDMA |
| | D) | none of the above |
|
39 | | In Bluetooth, the _____ link is used when avoiding latency (delay in data delivery) is more important than integrity (error-free delivery). |
|
| | A) | SCO |
| | B) | ACL |
| | C) | ACO |
| | D) | SCL |
|
40 | | In Bluetooth, the _____ link is used when data integrity is more important than avoiding latency. |
|
| | A) | SCO |
| | B) | ACL |
| | C) | ACO |
| | D) | SCL |
|
41 | | Bluetooth uses ______method in the physical layer to avoid interference from other devices or other networks. |
|
| | A) | DSSS |
| | B) | FHSS |
| | C) | FDMA |
| | D) | none of the above |