Business Data Communication and Networks test bank Essays

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Which of the following is a data link layer function?

A) packetizing B) error and flow control

C) medium access control

The data link layer is responsible for _______ delivery.

C) hop-to-hop The data packet at the data link layer is usually called a _______.

A) frame The protocol for obtaining the physical address of a node when the IP address is known is called _______.

C)
ARP
A signal can lose energy due to the resistance of the medium. This is called _______.

D) attenuation _______ can cause errors during data transmission.

A)
White noise

B)
Impulse noise

C)
Echo

Which of the following best describes a single-bit error?

B)
A single bit is inverted per data unit.
If the ASCII character G is sent and
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C)
Timing
Data flow between two devices can occur in a _______ way.

A) simplex B) half-duplex C) full-duplex In a ______ connection, two and only two devices are connected by a dedicated link.

B) point-to-point In a ________ connection, three or more devices share a link.

A) multipoint ______ refers to the physical or logical arrangement of a network.

C)
Topology
Devices may be arranged in a _____ topology.

A) mesh B) ring C) bus A _______ is a data communication system within a building, plant, or campus, or between nearby buildings.

B)
LAN
A ______ is a data communication system spanning states, countries, or the whole world.

C)
WAN
________ is a collection of many separate networks.

B)
An internet
There are ______________ Internet service providers.

A) local B) regional C) national and international
A ________ is a set of rules that governs data communication.

B) protocol ________ is an idea or concept that is a precursor to an Internet standard.

B)
RFC
The Internet model consists of _______ layers.

B)
Five
The process-to-process delivery of the entire message is the responsibility of the _______ layer.

B)
Transport
The _______ layer is the layer closest to the transmission medium.
A) Physical
Mail services are available to network users through the _______ layer.

D)
Application

As the data packet moves from the upper to the lower layers, headers are _______.

A)
Added
The _______ layer lies between the network
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