Wireless Technologies Questions and Answers

Q: MANET stands for

MANET stands for Mobile Ad-Hoc Network.A MANET is a self-configuring network of mobile devices connected wirelessly without any fixed infrastructure such as routers or access points. Every node also acts as a router, forwarding packets for others, and the topology changes as nodes move. Uses include battlefield communication, disaster relief and vehicle-to-vehicle networks (VANETs).'Mobile Area Network', 'Managed Access Network' and 'Multiple Access Node' are not what the acronym stands for; the key word is ad hoc, meaning set up on the spot without planning.

Q: Which IEEE standard is used for Wi-Fi ?

Wi-Fi is based on IEEE 802.11.IEEE 802.11 is the family of standards for wireless local area networks: 802.11b, g, n, ac and ax (Wi-Fi 6), among others. 'Wi-Fi' is the Wi-Fi Alliance's brand for devices certified under it.IEEE 802.3 is wired Ethernet. IEEE 802.16 is WiMAX, broadband wireless over metropolitan distances. IEEE 802.20 is Mobile Broadband Wireless Access, a standard for mobile data that saw little use.

Q: Which of the following is NOT a type of wireless network ?

The one that is not wireless is Ethernet.Ethernet is the standard for wired local area networks, carrying data over twisted-pair or fibre-optic cables.Wi-Fi (wireless LAN), Bluetooth (short-range personal area networking) and NFC (near-field communication over a few centimetres) are all wireless technologies.Ethernet cables are graded by category, such as Cat5e and Cat6, according to the speeds they support.

Q: For the transmission of the signal, Bluetooth wireless technology uses

Bluetooth uses time division duplex.A Bluetooth link alternates between the master and the slave in successive time slots, so the two directions share one frequency hop at a time. This is time division duplex (TDD), and it is combined with frequency hopping spread spectrum. Time division multiplexing (A) and frequency division multiplexing (B) share a channel among several signals, and frequency division duplex (D) would use separate frequencies for each direction, which Bluetooth does not do.

Q: How many non-overlapping channels are available with 802.11g?

Correct answer: 3802.11g shares the 2.4 GHz band with 802.11b and so shares its channel plan: eleven overlapping channels of which only 1, 6 and 11 can be used together. The higher data rate changes nothing about the spectrum available, which is why 802.11a’s twelve channels remain its principal advantage.

Q: What is the maximum data rate for the 802.11a standard?

Correct answer: 54Mbps802.11a reaches 54 Mbps, the same headline rate as 802.11g. The two differ in band rather than in speed - 5 GHz against 2.4 - which is why 802.11a offers more non-overlapping channels and less interference but a shorter range.

Q: What is the maximum distance with maximum data rate for 802.11a?

Correct answer: About 65-75 feet802.11a reaches only about 65 to 75 feet at its full 54 Mbps. It is the shortest range of the three standards here, because 5 GHz signals attenuate more rapidly in air and are absorbed more readily by walls and furnishings than 2.4 GHz. That is the price paid for the extra channels and the quieter band.

Q: How many non-overlapping channels are available with 802.11a?

Correct answer: 12802.11a has twelve non-overlapping channels in the 5 GHz U-NII bands, four times what 2.4 GHz offers. The channels there are spaced so they do not overlap at all, which makes the channel plan for a dense deployment far easier and is the main practical reason for choosing 5 GHz.

Q: What is the frequency range of the IEEE 802.11a standard?

Correct answer: 5GHz802.11a operates in the 5 GHz U-NII bands. Note that two of the options are given in Gbps - a data rate, not a frequency - so they can be eliminated on units alone before any knowledge of the standard is applied. The move to 5 GHz is what gives 802.11a its twelve non-overlapping channels and its shorter range, since higher frequencies attenuate faster.

11.

MANET stands for

A.Mobile Area Network
B.Managed Access Network
C.Mobile Ad-Hoc Network
D.Multiple Access Node

Exam Year(s)

Tripura Public Service Commission - 2026,

Answer: C

MANET stands for Mobile Ad-Hoc Network.

A MANET is a self-configuring network of mobile devices connected wirelessly without any fixed infrastructure such as routers or access points. Every node also acts as a router, forwarding packets for others, and the topology changes as nodes move. Uses include battlefield communication, disaster relief and vehicle-to-vehicle networks (VANETs).

'Mobile Area Network', 'Managed Access Network' and 'Multiple Access Node' are not what the acronym stands for; the key word is ad hoc, meaning set up on the spot without planning.

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12.

Which IEEE standard is used for Wi-Fi ?

A.IEEE 802.11
B.IEEE 802.20
C.IEEE 802.3
D.IEEE 802.16

Exam Year(s)

Tripura Public Service Commission - 2026,

Answer: A

Wi-Fi is based on IEEE 802.11.

IEEE 802.11 is the family of standards for wireless local area networks: 802.11b, g, n, ac and ax (Wi-Fi 6), among others. 'Wi-Fi' is the Wi-Fi Alliance's brand for devices certified under it.

IEEE 802.3 is wired Ethernet. IEEE 802.16 is WiMAX, broadband wireless over metropolitan distances. IEEE 802.20 is Mobile Broadband Wireless Access, a standard for mobile data that saw little use.

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13.

Which of the following is NOT a type of wireless network ?

A.Wi-Fi
B.Bluetooth
C.NFC
D.Ethernet

Exam Year(s)

Tripura Public Service Commission - 2025,

Answer: D

The one that is not wireless is Ethernet.

Ethernet is the standard for wired local area networks, carrying data over twisted-pair or fibre-optic cables.

Wi-Fi (wireless LAN), Bluetooth (short-range personal area networking) and NFC (near-field communication over a few centimetres) are all wireless technologies.

Ethernet cables are graded by category, such as Cat5e and Cat6, according to the speeds they support.

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14.

For the transmission of the signal, Bluetooth wireless technology uses

A.time division multiplexing
B.frequency division multiplexing
C.time division duplex
D.frequency division duplex

Exam Year(s)

UGC NET - 2012,

Answer: C

Bluetooth uses time division duplex.

A Bluetooth link alternates between the master and the slave in successive time slots, so the two directions share one frequency hop at a time. This is time division duplex (TDD), and it is combined with frequency hopping spread spectrum. Time division multiplexing (A) and frequency division multiplexing (B) share a channel among several signals, and frequency division duplex (D) would use separate frequencies for each direction, which Bluetooth does not do.

Discuss in Forum

15.

How many non-overlapping channels are available with 802.11g?

A.3
B.12
C.23
D.40

Answer: A

Correct answer: 3

802.11g shares the 2.4 GHz band with 802.11b and so shares its channel plan: eleven overlapping channels of which only 1, 6 and 11 can be used together. The higher data rate changes nothing about the spectrum available, which is why 802.11a’s twelve channels remain its principal advantage.

Discuss in Forum

16.

Cisco's Unified Wireless Solution provides a mesh solution. What devices do you absolutely need to purchase to run a Cisco solution?

1.WCS

2.Controller

3.Access point

4.Bridge

A.1 and 2
B.2 and 3
C.1 and 4 only
D.4 only

Answer: B

The Cisco Unified Wireless Solution is a great product, but you must purchase specialized devices. Cisco managed access points and a controller are the devices you need to purchase to run the Unified Wireless Solution.

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17.

What is the maximum data rate for the 802.11a standard?

A.6Mbps
B.11Mbps
C.22Mbps
D.54Mbps

Answer: D

Correct answer: 54Mbps

802.11a reaches 54 Mbps, the same headline rate as 802.11g. The two differ in band rather than in speed - 5 GHz against 2.4 - which is why 802.11a offers more non-overlapping channels and less interference but a shorter range.

Discuss in Forum

18.

What is the maximum distance with maximum data rate for 802.11a?

A.About 65-75 feet
B.About 90-100 feet
C.About 150 feet
D.Over 200 feet

Answer: A

Correct answer: About 65-75 feet

802.11a reaches only about 65 to 75 feet at its full 54 Mbps. It is the shortest range of the three standards here, because 5 GHz signals attenuate more rapidly in air and are absorbed more readily by walls and furnishings than 2.4 GHz. That is the price paid for the extra channels and the quieter band.

Discuss in Forum

19.

How many non-overlapping channels are available with 802.11a?

A.3
B.12
C.23
D.40

Answer: B

Correct answer: 12

802.11a has twelve non-overlapping channels in the 5 GHz U-NII bands, four times what 2.4 GHz offers. The channels there are spaced so they do not overlap at all, which makes the channel plan for a dense deployment far easier and is the main practical reason for choosing 5 GHz.

Discuss in Forum

20.

What is the frequency range of the IEEE 802.11a standard?

A.2.4Gbps
B.5Gbps
C.2.4GHz
D.5GHz

Answer: D

Correct answer: 5GHz

802.11a operates in the 5 GHz U-NII bands. Note that two of the options are given in Gbps - a data rate, not a frequency - so they can be eliminated on units alone before any knowledge of the standard is applied. The move to 5 GHz is what gives 802.11a its twelve non-overlapping channels and its shorter range, since higher frequencies attenuate faster.

Discuss in Forum

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