Networking Basics Questions and Answers

Q: The _______ is the physical path over which a message travels:

Correct answer: MediumThe transmission medium is the physical path along which the signal actually travels - twisted pair, coaxial cable, optical fibre or free space. It is one of the five components of a data communication system, with the message, sender, receiver and protocol. A path or route is the logical sequence of nodes a message passes through, which is a different idea from the physical carrier itself.

Q: Which organization has authority over interstate and international commerce in the communications field?

Correct answer: FCCThe Federal Communications Commission regulates interstate and international communications by radio, television, wire, satellite and cable, and it allocates the radio spectrum within the United States. The ITU-T issues international telecommunication recommendations but does not regulate commerce; the IEEE develops standards such as the 802 series; and ISOC is the parent body of the IETF.

Q: Which network topology connects every device to a single central hub or switch ?

Correct answer: StarIn a star topology each node has its own link to a central device, so a single cable failure isolates only one node. The weakness is the centre itself, whose failure brings down the whole network.

Q: A set of rules that governs data communication:

Correct answer: ProtocolsA protocol is the agreed set of rules governing a data exchange, covering syntax, semantics and timing. Standards are the documents that record such agreements formally and give them authority, and RFCs are the particular series in which the IETF publishes them. The rules themselves are the protocol; the standard and the RFC are how the rules are written down and disseminated.

Q: Three or more devices share a link in ________ connection:

Correct answer: MultipointIn a multipoint, or multidrop, connection more than two devices share a single link, so the capacity is shared - spatially if they can transmit at once, or in time if they must take turns. A point-to-point connection dedicates the whole link to two devices. Simplex describes the direction of flow rather than the number of devices, so it answers a different question altogether.

Q: Which transmission media has the highest transmission speed in a network?

Correct answer: optical fiberOptical fibre carries data as light through a glass core and offers by far the greatest bandwidth of the guided media, with speeds in the gigabits and terabits per second and very low attenuation over long distances. It is also immune to electromagnetic interference and hard to tap. Twisted pair and coaxial cable both carry electrical signals and are limited by attenuation and interference well below what fibre achieves.

191.

The _______ is the physical path over which a message travels:

A.Path
B.Medium
C.Protocol
D.Route

Answer: B

Correct answer: Medium

The transmission medium is the physical path along which the signal actually travels - twisted pair, coaxial cable, optical fibre or free space. It is one of the five components of a data communication system, with the message, sender, receiver and protocol. A path or route is the logical sequence of nodes a message passes through, which is a different idea from the physical carrier itself.

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192.

Which organization has authority over interstate and international commerce in the communications field?

A.ITU-T
B.IEEE
C.FCC
D.ISOC

Answer: C

Correct answer: FCC

The Federal Communications Commission regulates interstate and international communications by radio, television, wire, satellite and cable, and it allocates the radio spectrum within the United States. The ITU-T issues international telecommunication recommendations but does not regulate commerce; the IEEE develops standards such as the 802 series; and ISOC is the parent body of the IETF.

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193.

Which network topology connects every device to a single central hub or switch ?

A.Bus
B.Ring
C.Star
D.Mesh

Answer: D

Correct answer: Star

In a star topology each node has its own link to a central device, so a single cable failure isolates only one node. The weakness is the centre itself, whose failure brings down the whole network.

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194.

A set of rules that governs data communication:

A.Protocols
B.Standards
C.RFCs
D.None of the mentioned

Answer: A

Correct answer: Protocols

A protocol is the agreed set of rules governing a data exchange, covering syntax, semantics and timing. Standards are the documents that record such agreements formally and give them authority, and RFCs are the particular series in which the IETF publishes them. The rules themselves are the protocol; the standard and the RFC are how the rules are written down and disseminated.

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195.

Three or more devices share a link in ________ connection:

A.Unipoint
B.Multipoint
C.Point to point
D.None of the mentioned

Answer: B

Correct answer: Multipoint

In a multipoint, or multidrop, connection more than two devices share a single link, so the capacity is shared - spatially if they can transmit at once, or in time if they must take turns. A point-to-point connection dedicates the whole link to two devices. Simplex describes the direction of flow rather than the number of devices, so it answers a different question altogether.

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196.

Which transmission media has the highest transmission speed in a network?

A.coaxial cable
B. twisted pair cable
C.optical fiber
D.electrical cable

Answer: C

Correct answer: optical fiber

Optical fibre carries data as light through a glass core and offers by far the greatest bandwidth of the guided media, with speeds in the gigabits and terabits per second and very low attenuation over long distances. It is also immune to electromagnetic interference and hard to tap. Twisted pair and coaxial cable both carry electrical signals and are limited by attenuation and interference well below what fibre achieves.

Discuss in Forum

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