Business Data Communication and Networks test bank

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 the character D is received, what type of error is this?

C) burst If the ASCII character H is sent and the character I is received, what type of error is this?

A) single-bit _______ in error detection involves the addition of extra bits to the data unit.
A)Redundancy

Which error detection method consists of a parity bit for each data unit as well as an entire data unit of parity bits?

B)
LRC
Which error detection method consists of just one redundant bit per data unit?

A)
VRC
Which error detection method involves the use of parity bits?

A)
VRC
The protocol to correct errors by retransmitting the data is known as _______.

Regulation of the rate of transmission of data frames is known as _______.
B) flow control
_______ methods prevent collisions between two or more computers that want to send data at the same time.

C)
Medium access control
_______ is a controlled access method.

A)
Token passing

B)
Poll/select

When a primary device wants to send data to a secondary device, it needs to first send _______ frame.

C) a SEL
When a secondary device is ready to send data, it must wait for _______ frame.

B) a poll
_______ is a random access (or contention) method.

C)
CSMA/CD
Ethernet LANs use _______ for medium access