Which of the following is true about the data link protocol, Ethernet (IEEE 802.3)?

Which of the following is true about the data link protocol, Ethernet (IEEE 802.3)? a. it is not very popular b. it is a bit-oriented protocol c....

Synchronous transmission:

Synchronous transmission:  a. cannot be used on multipoint circuits b. is used to send one character at a time c. uses start bits before each...

Asynchronous transmission:

Asynchronous transmission:  a. is used to transmit each character simultaneously with all other characters b. has a pre-determined, fixed time...

_______ controls errors by detecting and correcting them at the receiving end without retransmission of the original message.

_______ controls errors by detecting and correcting them at the receiving end without retransmission of the original message.  a. Hamming code b....

With __________ ARQ, the sender immediately sends the next message or packet of data.

With __________ ARQ, the sender immediately sends the next message or packet of data.  a. continuous b. immediate c. open window d. stop-and-wait e....

With __________ ARQ, the sender pauses for a response from the receiver to alter each message or packet of data.

With __________ ARQ, the sender pauses for a response from the receiver to alter each message or packet of data.  a. open window b. halt and...

ARQ means that:

ARQ means that:  a. a receiver that detects an error in a message simply asks the sender to retransmit the message until it is received without...

Using parity, the probability for detecting an error, given that one has occurred, is:

Using parity, the probability for detecting an error, given that one has occurred, is:  a. about 50% for either even or odd parity b. about...

The probability of detecting an error, given that one has occurred, using parity checking is about:

The probability of detecting an error, given that one has occurred, using parity checking is about:  a. 100% b. 0% c. 50% d. 75% e. 98% Answer:...

With odd parity (assume that the parity bit (in bold) has been placed at the end of each of the following) and a 7-bit ASCII code, which of the following is incorrect?

With odd parity (assume that the parity bit (in bold) has been placed at the end of each of the following) and a 7-bit ASCII code, which of the following...

Which of the following is not an error detection method used in the data link layer?

Which of the following is not an error detection method used in the data link layer?  a. parity checking b. cyclic redundancy checking c. CRC-32 d....

On digital circuits, we use _________ to reshape the incoming signal and prevent attenuation.

On digital circuits, we use _________ to reshape the incoming signal and prevent attenuation. a. amplifiers b. repeaters c. multiplexers d. digitizers e....

Which of the following is way to reduce or eliminate crosstalk on a circuit,

Which of the following is way to reduce or eliminate crosstalk on a circuit, a. changing multiplexing techniques b. adding repeaters or amplifiers...

_________ is an effective way to prevent attenuation.

_________ is an effective way to prevent attenuation.  a. Shielding wires b. Adding fluorescent lights c. Adding repeaters or amplifiers to a...

_______ is an effective way to prevent impulse noise, cross talk, and intermodulation noise.

_______ is an effective way to prevent impulse noise, cross talk, and intermodulation noise.  a. Shielding wires b. Adding fluorescent lights c....

When the output signal from an amplifier on a circuit is different from the input signal, this is called _________________.

When the output signal from an amplifier on a circuit is different from the input signal, this is called _________________. a. intermodulation noise b....

If a signal with a frequency of 500 MHz combines with a another signal of 1500 MHz and they form a new signal of 2000 MHz; this is an example of:

If a signal with a frequency of 500 MHz combines with a another signal of 1500 MHz and they form a new signal of 2000 MHz; this is an example of: a....

The loss of power a signal suffers as it travels from the transmitting computer to a receiving computer is:

The loss of power a signal suffers as it travels from the transmitting computer to a receiving computer is:  a. jitter b. spiking c. attenuation d....

When a signal is reflected back to the transmitting equipment, it is called a(n) _________.

When a signal is reflected back to the transmitting equipment, it is called a(n) _________. a. jitter b. echo c. crosstalk d. attenuation e. impulse...

Cross-talk:

Cross-talk:  a. occurs when one circuit picks up signals in another b. is always bothersome because it has a high signal strength c. decreases...

_______can obliterate a group of bits, causing a burst error.

_______can obliterate a group of bits, causing a burst error. a. Crosstalk b. Attenuation c. Impulse noise d. Intermodulation noise e. Jitter Answer:...

The primary source of error in data communications is:

The primary source of error in data communications is:  a. echoes b. intermodulation noise c. spikes d. jitter e. cross-talk Answer:...

Another term for impulse noise is:

Another term for impulse noise is:  a. Gaussian noise b. spikes c. attenuation d. cross-talk e. intermodulation noise Answer:...

Which of the following media is least susceptible to noise?

Which of the following media is least susceptible to noise?  a. fiber optic cable b. coaxial cable c. twisted pair d. unshielded twisted pair e....

Harmonic distortion can be prevented by

Harmonic distortion can be prevented by  a. tuning equipment b. moving wires c. increasing guardbands d. increasing signal strength e. using...

Errors on a network can occur:

Errors on a network can occur:  a. only on dial-up type of circuits b. because of noise on the line c. only on poorly maintained networks d....

In general, controlled approaches:

In general, controlled approaches:  a. work better than contention approaches for small networks that have low usage b. work better than contention...

With contention:

With contention:  a. computers wait until the circuit is free before they send data b. the server or front end processor works consecutively...

Which of the following is true about roll call polling?

Which of the following is true about roll call polling?  a. It can not be modified to increase priority of clients or terminals. b. It does...

_______ is the process of sending a signal to a client that gives its permission to transmit or asks it to receive.

_______ is the process of sending a signal to a client that gives its permission to transmit or asks it to receive. a. Contention b. Polling c. Pooling d....

Which of the following is not a controlled access method of media access control?

Which of the following is not a controlled access method of media access control?  a. Token passing b. CSMA/CD c. polling d. roll call polling e....

Media access control:

Media access control:  a. is not very important in point-to-point with full duplex configuration b. is not very important in local area networks c....

______ is not a function of a data link protocol.

______ is not a function of a data link protocol. a. Media access control b. Message delineation c. Amplitude shift keying d. Indicating when a message...

Which of the following is true with respect to the data link layer?

Which of the following is true with respect to the data link layer?  a. It accepts streams of bits from the application layer. b. It is responsible...