IBPS IT SO Study material- Computer Networks-Physical Media

IBPS IT SO Study material- Computer Networks

Physical Media

1) Which of this is not a guided media ?
a) Fiber optical cable
b) Coaxial cable
c) Wireless LAN
d) Copper wire

Answer: c
Explanation: Wireless LAN is unguided media.

2) UTP is commonly used in
a) DSL
b) FTTP
c) HTTP
d) None of the mentioned

Answer: a
Explanation: Unshielded twisted pair(UTP) is commonly used in home access.

3) Coaxial cable consists of _______ concentric copper conductors.
a) 1
b) 2
c) 3
d) 4

Answer: b
Explanation: None.

4) Fiber optics posses following properties
a) Immune electromagnetic interference
b) Very less signal attenuation
c) Very hard to tap
d) All of the mentioned

Answer: d
Explanation: None.

5) If an Optical Carrier is represented as OC-n, generally the link speed equals(in Mbps),
a) n*39.8
b) n*51.8
c) 2n*51.8
d) None of the mentioned

Answer: b
Explanation: None.

6) Terrestrial radio channels are broadly classifed into _____ groups.
a) 2
b) 3
c) 4
d) 1

Answer: b
Explanation: The three types are those that operate over very short distance, those that operate in local areas, those that operate in the wide area.

7) Radio channels are attractive medium because
a) Can penetrate walls
b) Connectivity can be given to mobile user
c) Can carry signals for long distance
d) All of the mentioned

Answer: d
Explanation: None.

8) Geostationary satellites
a) Are placed at a fixed point above the earth
b) Rotate the earth about a fixed axis
c) Rotate the earth about a varying axis
d) All of the mentioned

Answer: a
Explanation: They are placed in orbit at 36,000km above Earth’s surface.

All the best for your exams @Mission IT SO 2016