NETWORKS 622
TOPIC 1
EASY QUESTIONS
1. What is the access point (AP) in wireless LAN?
a) device that allows wireless devices to connect to a wired network
b) wireless devices itself
c) both (a) and (b)
d) none of the mentioned
2. In wireless ad-hoc network
a) access point is not required
b) access point is a must
c) nodes are not required
d) none of the mentioned
3. Which multiple access technique is used by IEEE 802.11 standard for wireless
LAN?
a) CDMA
b) CSMA/CA
c) ALOHA
d) none of the mentioned
4. In wireless distribution system
a) multiple access point is inter-connected with each other
b) there is no access point
c) only one access point exists
d) none of the mentioned
5. A wireless network interface controller can work in
a) Infrastructure mode
b) ad-hoc mode
c) both (a) and (b)
d) none of the mentioned
6. In wireless network an extended service set is a set of
a) connected basic service sets
b) all stations
c) all access points
d) none of the mentioned
7. Mostly is used in wireless LAN.
a) time division multiplexing
b) orthogonal frequency division multiplexing
c) space division multiplexing
d) none of the mentioned
,8. Which one of the following event is not possible in wireless LAN.
a) collision detection
b) Acknowledgement of data frames
c) multi-mode data transmission
d) none of the mentioned
9. What is Wired Equivalent Privacy (WEP)?
a) Security algorithm for Ethernet
b) security algorithm for wireless networks
c) security algorithm for USB communication
d) none of the mentioned
10. What is WPA?
a) Wi-Fi protected access
b) wired protected access
c) wired process access
d) Wi-Fi process access
11. The advantages of FDMA over TDMA includes
i. Division is simpler
ii. Propagation delays are eliminated
iii. Cheaper filters with less complicated logic functions
iv. Linearity
a. 1), 2) and 3) are correct
b. 1) and 2) are correct
c. 1) and 4) are correct
d. All four are correct
12. TDMA is a multiple access technique that has
a. Different users in different time slots
b. Each user is assigned unique frequency slots
c. Each user is assigned a unique code sequence
d. Each signal is modulated with frequency modulation technique
13. In TDMA, the user occupies the whole bandwidth during transmission.
a. True
b. False
14 TDMA allows the user to have
a. Use of same frequency channel for same time slot
b. Use of same frequency channel for different time slot
c. Use of same time slot for different frequency channel
d. Use of different time slot for different frequency channels
ANSWER: b. Use of same frequency channel for different time slot
15. GSM is an example of
a. TDMA cellular systems
b. FDMA cellular systems
c. CDMA cellular systems
d. SDMA cellular systems
,16. TDMA is employed with a TDMA frame that has preamble. The preamble contains
Address of base station and subscribers
1. Synchronization information
2. Frequency allotted
3. Coded sequence
a. 1 and 2 are correct
b. 1, 2 and 3 are correct
c. 2 and 4 are correct
d. All the four correct
17. Which standard is used by wireless products that utilize orthogonal frequency division
multiplexing
(OFDM) technology?
a) 802.11a
b) 802.11b
c) 802.11c
d) 802.11d
18. When necessary, which type of MAC service data unit is given priority by the 802.11 MAC
sublayer
services?
a) Broadcast
b) Unicast
c) Multicast
d) Keep-alive
19. In the simplest wireless LAN configuration, all devices equipped with a client adapter can
communicate directly with one another. Which term describes this configuration?
a) Infrastructure
b) Ad hoc
c) Roaming
d) Microcellular
20. An access point has a data rate of 2.0 Mbps and only yields 1000 kbps of throughput because of
overhead. What is the efficiency of the access point?
a) 25%
b) 50%
c) 75%
d) 85%
21. What is WAP?
a) A set of communication protocols that give mobile device users access to the same information
from a pocket-sized device as they have from the desktop.
b) A set of communication protocols that give mobile device users the ability to switch from wireless
to
wired network access.
c) A suite of proprietary applications that provide Telnet and ping functionality to wireless pocket-
sized
mobile devices.
d) A suite of standards used in the wireless environment to ensure interoperability between
products.
IEEE technique, that are used to describe high rate direct sequence spread spectrum method for
signal generation is called
A. IEEE 802.11 infrared
, B. IEEE 802.11b DSSS
C. 802.11g OFDM
D. IEEE 802.11 DSSS
Answer B
Cellular Telephony Quiz
In cellular telephony, radius of a cell is typically
A. 1 to 12 mi
B. 2 to 14 mi
C. 2 to 16 mi
D. 2 to 20 mi
Answer A
Network where there is no resource reservation is called
A. Circuit-Switched Networks
B. message-switched networks
C. Packet-switched networks
D. satellite network
Answer C
Two techniques to spread bandwidth are
A. FHSS and TDM
B. DSSS and FHSS
C. FDM and FHSS
D. none
Answer B
Fast Ethernet address contains
A. 46 bits
B. 48 bits
C. 54 bits
D. 64 bits
TOPIC 1
EASY QUESTIONS
1. What is the access point (AP) in wireless LAN?
a) device that allows wireless devices to connect to a wired network
b) wireless devices itself
c) both (a) and (b)
d) none of the mentioned
2. In wireless ad-hoc network
a) access point is not required
b) access point is a must
c) nodes are not required
d) none of the mentioned
3. Which multiple access technique is used by IEEE 802.11 standard for wireless
LAN?
a) CDMA
b) CSMA/CA
c) ALOHA
d) none of the mentioned
4. In wireless distribution system
a) multiple access point is inter-connected with each other
b) there is no access point
c) only one access point exists
d) none of the mentioned
5. A wireless network interface controller can work in
a) Infrastructure mode
b) ad-hoc mode
c) both (a) and (b)
d) none of the mentioned
6. In wireless network an extended service set is a set of
a) connected basic service sets
b) all stations
c) all access points
d) none of the mentioned
7. Mostly is used in wireless LAN.
a) time division multiplexing
b) orthogonal frequency division multiplexing
c) space division multiplexing
d) none of the mentioned
,8. Which one of the following event is not possible in wireless LAN.
a) collision detection
b) Acknowledgement of data frames
c) multi-mode data transmission
d) none of the mentioned
9. What is Wired Equivalent Privacy (WEP)?
a) Security algorithm for Ethernet
b) security algorithm for wireless networks
c) security algorithm for USB communication
d) none of the mentioned
10. What is WPA?
a) Wi-Fi protected access
b) wired protected access
c) wired process access
d) Wi-Fi process access
11. The advantages of FDMA over TDMA includes
i. Division is simpler
ii. Propagation delays are eliminated
iii. Cheaper filters with less complicated logic functions
iv. Linearity
a. 1), 2) and 3) are correct
b. 1) and 2) are correct
c. 1) and 4) are correct
d. All four are correct
12. TDMA is a multiple access technique that has
a. Different users in different time slots
b. Each user is assigned unique frequency slots
c. Each user is assigned a unique code sequence
d. Each signal is modulated with frequency modulation technique
13. In TDMA, the user occupies the whole bandwidth during transmission.
a. True
b. False
14 TDMA allows the user to have
a. Use of same frequency channel for same time slot
b. Use of same frequency channel for different time slot
c. Use of same time slot for different frequency channel
d. Use of different time slot for different frequency channels
ANSWER: b. Use of same frequency channel for different time slot
15. GSM is an example of
a. TDMA cellular systems
b. FDMA cellular systems
c. CDMA cellular systems
d. SDMA cellular systems
,16. TDMA is employed with a TDMA frame that has preamble. The preamble contains
Address of base station and subscribers
1. Synchronization information
2. Frequency allotted
3. Coded sequence
a. 1 and 2 are correct
b. 1, 2 and 3 are correct
c. 2 and 4 are correct
d. All the four correct
17. Which standard is used by wireless products that utilize orthogonal frequency division
multiplexing
(OFDM) technology?
a) 802.11a
b) 802.11b
c) 802.11c
d) 802.11d
18. When necessary, which type of MAC service data unit is given priority by the 802.11 MAC
sublayer
services?
a) Broadcast
b) Unicast
c) Multicast
d) Keep-alive
19. In the simplest wireless LAN configuration, all devices equipped with a client adapter can
communicate directly with one another. Which term describes this configuration?
a) Infrastructure
b) Ad hoc
c) Roaming
d) Microcellular
20. An access point has a data rate of 2.0 Mbps and only yields 1000 kbps of throughput because of
overhead. What is the efficiency of the access point?
a) 25%
b) 50%
c) 75%
d) 85%
21. What is WAP?
a) A set of communication protocols that give mobile device users access to the same information
from a pocket-sized device as they have from the desktop.
b) A set of communication protocols that give mobile device users the ability to switch from wireless
to
wired network access.
c) A suite of proprietary applications that provide Telnet and ping functionality to wireless pocket-
sized
mobile devices.
d) A suite of standards used in the wireless environment to ensure interoperability between
products.
IEEE technique, that are used to describe high rate direct sequence spread spectrum method for
signal generation is called
A. IEEE 802.11 infrared
, B. IEEE 802.11b DSSS
C. 802.11g OFDM
D. IEEE 802.11 DSSS
Answer B
Cellular Telephony Quiz
In cellular telephony, radius of a cell is typically
A. 1 to 12 mi
B. 2 to 14 mi
C. 2 to 16 mi
D. 2 to 20 mi
Answer A
Network where there is no resource reservation is called
A. Circuit-Switched Networks
B. message-switched networks
C. Packet-switched networks
D. satellite network
Answer C
Two techniques to spread bandwidth are
A. FHSS and TDM
B. DSSS and FHSS
C. FDM and FHSS
D. none
Answer B
Fast Ethernet address contains
A. 46 bits
B. 48 bits
C. 54 bits
D. 64 bits
