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#91 In which communication mode data can be sent and received in both directions but not at the same time ?
A) Simplex
B) Full-duplex
C) Half-duplex
D) duplex
Answer: C
#92 ________ is a set of rules that governs data communications
A) Message
B) Sender
C) Medium
D) Protocol
Answer: D
#93 ________ cable is formed of two insulated coper wires twisted together.
A) Coaxial
B) Fiber Optic
C) CAT5
D) Twisted Pair
Answer: D
#94 which of the following network devices is used to forward data packets across different networks ?
A) switch
B) Router
C) Gateway
D) Modem
Answer: B
#95 which of the following topology is most expensive implement ?
A) Star Topology
B) Bus Topology
C) Ring Topology
D) Mesh Topology
Answer: D
#96 How many layers does the OSI model consist of ?
A) 4
B) 5
C) 8
D) 7
Answer: D
#97 ____________ Topology each node (computer server peripheral etc) attaches to a common cable.
A) Star
B) Tree
C) Ring
D) Mesh
Answer: C
#98 The frequency range of radio signal is between 3 KHz to ________ GHz.
A) 1
B) 2
C) 3
D) 4
Answer: A
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