Ch 4 MIS 4123

अब Quizwiz के साथ अपने होमवर्क और परीक्षाओं को एस करें!

In general, controlled approaches do not require a host, server, or active monitor to assign media access control.

False

Media access control is not very important in a multipoint configuration.

False

Media access control is not very important in a point-to-point with a half-duplex configuration.

False

Polling is the process of permitting all clients to transmit or receive at any time.

False

Synchronous transmission uses start bits before each character to be sent.

False

The data link layer is responsible for encoding the bit-stream as a series of electronic voltages.

False

The data link protocol, PPP is a bit-oriented protocol.

False

Using parity, the probability for detecting an error, given that one has occurred, is about 25% for either even or odd parity.

False

Using parity, the probability for detecting an error, given that one has occurred, is about 30% for even parity and 70% for odd parity.

False

With contention, a computer does not have to wait before it can transmit. A computer can transmit at any time.

False

____________ refers to bits that have been changed, in error, from 1 to 0, or vice versa, in a data transmission.

Flipped bits

Cyclical redundancy check is one of the most popular polynomial error-checking schemes.

True

Media access controls refer to the need to control when computers transmit.

True

Which of the following is not a type of synchronous protocol?

VT100

In an odd parity-checking scheme, the parity bit is set to make the total number of ones in the byte (including the parity bit) an even number.

False

__________ is a software-enabled technique that can change the hardcoded MAC address to any MAC address and thus overcome MAC address filtering.

MAC address spoofing

Crosstalk occurs when the signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel.

True

Errors on a network can occur:

because of noise on the line.

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

echo

Cross-talk:

occurs when one circuit picks up signals in another.


संबंधित स्टडी सेट्स

Math Taylor Tutorial Homework: Chapter 1

View Set

Sociology: October 16th - December 1st

View Set

Advanced PLCs Test 1: Module 1-3

View Set

Set Theory Symbols & Definitions

View Set

321 final - ch42: mngt of pts w musculoskeletal trauma

View Set