Subject: WCN
Course: B.Tech Branch: ECE (A & B) Year: IV Sem: II
UNIT-1
1. Data rate of diffused IR LANS is Mbps
Ans: 3
2. Typical coverage area of a wireless LAN has a diameter of
Ans: 100 -300m
3. Data rate of diffused IRLANS is Mbps
Ans: 4
4. IR data transmission uses modulation.
Ans: intensity
5. The LAN that operates at microwave frequencies is
Ans: Narrowband microwave LAN.
6. Access method used in IR LANS is
Ans: b & c
7. Radio LAN operates in band
Ans: 5.8 GHz
8. The LAN that operate at ISM bandsis
Ans: SS LAN
9. Licensing is not required for LAN’s
Ans: Narrowband Radio
10. IEEE 802.1 lg operates in band
Ans: 2.4 GHz
11. The reason forextremely high data rates in IR LAN is
Ans: Unlimited spectrum
12. standard is referred as a regulatory dontain update
Ans: IEEE 802 .11d
13. Available bandwidth for 802.11 standard is_
Ans: 83.5MHz
14. Number of non-over1apping channels is
Ans: 3
15. The transmission technique in IR LAN that can beused to creat point-to-point link is
Ans: Direct beam
16. IEEE 802.11 a makes use of frequency band called
Ans: UNNI
17. Modulation technique for Bluetooth is
Ans: Guassian FSK
18. The 1owst layer of IEEE 802 protocol is
Ans: Physical
19. Bluetooth devices operate in the range of_ m
Ans: 10
20. Data rate for bluetooth radio is _Mbps:
Ans: 1
UNIT-II
1. Theunit of data exchanged between two peer MAC entities using the services of the Physical layer in IEEE 802.11 is
Ans: MPDU
2. Bluetooth makes use of frequency band
Ans: 2.4GHz
3. Frrquency hop rate for Bluetooth radio is hops/sec
Ans: 1600
4.In IEEE 802.11, the primary service that is used by the stations to exchange MAC frame is Ans: Distribution
5. scheme is used in the physicallayer of 802.15.3
Ans: TCM
6. IEEE standard for WPAN IS
Ans: 802.15
7. TheBoolean logic operator that is employed in wired equivalent privacy algorithm is
Ans: XOR
8.RECOMM is a protocol
Ans: cable replacement
9. Core protocols of bluetooth consists of layers
Ans: 4
10. Thecore protocol in Bluetooth that specifies the details of air interface is
Ans: Radio
11. Howmany layers are present in SMS?
Ans: 4
12. provides security services between Mobile device and client
Ans: WTLS
13. The basic unit of networking in a bluetooth is
Ans: Piconet
14. WAP— stands for
Ans: Wireless application Protocol
15. . provides security services between Mobile device and client
Ans: WTLS
16. Theoverlapping of a device among two piconets form a
Ans: scatternet
17.I-mode devices transmit at a data rate of bps
Ans: 1800
18.HIPERLAN is service
Ans: Request-reply
19.An example of independent mobile data network with licensed band is
Ans: ARDIS Mobitex
20. Data rate for HIPERLAN is Mbps
Ans: 23.5
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