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#141 How many layers does the OSI model consist of ?
A) 4
B) 5
C) 8
D) 7
Answer: D
#142 ____________ Topology each node (computer server peripheral etc) attaches to a common cable.
A) Star
B) Tree
C) Ring
D) Mesh
Answer: C
#143 The frequency range of radio signal is between 3 KHz to ________ GHz.
A) 1
B) 2
C) 3
D) 4
Answer: A
#144 What does WAP stand for?
A) wireless access place
B) wireless application protocol
C) wireless access protocol
D) wireless access portion
Answer: B
#145 Which of the following is used to provide internet access and multimedia services at very high speed to the end users?
A) Wi-Fi
B) Bluetooth
C) Infra-red
D) WiMax
Answer: D
#146 ____________ Uses 802.11 standard, developed by the institute of electrical and electronic engineers (UEEE).
A) Wi-Fi
B) Bluetooth
C) Infra-red
D) WiMax
Answer: A
#147 ___________ signals can be used for short-range communication in a closed area using line-of-sight propagation.
A) Wi-Fi
B) Bluetooth
C) WiMax
D) Infra-red
Answer: D
#148 The GPS system consists of ___________ satellites.
A) 20
B) 22
C) 24
D) 25
Answer: C
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