Wk4_Quiz_Questions_And_Answers Flashcards Preview

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Flashcards in Wk4_Quiz_Questions_And_Answers Deck (55):
1

Checksum checking has a higher probability of detecting errors than longitudinal redundancy checking. True or false?

TRUE

2

True or false. Type 1 PDUs will have information and supervisory frames.Page: 94

FALSE

3

Odd parity is usually associated with this type of transmission: Page: 99

asynchronous

4

True or False. A sliding windows sequence number field must be a specific bit size. Page: 97

TRUE

5

A form of flow control: Page: 95

stop and wait and sliding windows

6

Yes or no: It is the function of the physical layer to assign physical addressing.Page: 92

No

7

True or False: A sender and receiver in a sliding windows flow control can use different size sequence number bit fields. Page: 97

FALSE

8

True or False: Logical Link Control provides four types of frame delivery service. Page: 93

FALSE

9

Line discipline is used to enforce rules of communication between 2 devices. True or False

TRUE

10

On a half-duplex circuit, 2 devices can be simultaneously transmitting. True or false

FALSE

11

The IEEE 802 implementation has 3 parts. True or false

FALSE

12

In 1985 the IEEE developed Project 802. True or False

TRUE

13

The portion of the 802 stack associated with CSMA/CD:

802.3

14

Where the block check character is placed when attached to the core message

The end

15

In sliding windows, it is the acknowledgement that ultimately controls the expansion and contracgtion of buffer windows.

TRUE

16

Type 1 delivery service requires an acknowledgement. True or false

FALSE

17

supervisory frames do not have a data field. True or false

true - supervisory frames do NOT have a data field

18

U frames are connection-oriented. True or false

FALSE

19

In sliding windows, a sender can send more frames to a receiver's windows buffer without regard to acknowledgements. True or false

FALSE

20

Ethernet is a contention-based MAC protocol. True or false

TRUE

21

A type of communication in which devices must take turns to use the line is called

half-duplex

22

Type of data link protocols primarily used to delineate groups of bits or bytes

synchronous

23

Flow control is not a factor in error correction techniques. True or False?

FALSE

24

Last arithmetic operation performed to determine a resulting checksum

Division

25

Line discipline associated with a centralized controlling communication device

Polling

26

Most common form of error correction

retransmission

27

The data link layer is between the physical and transport layers. True or False

FALSE

28

Parity can have three conditions: even, odd, or none. True or False

FALSE

29

Type 2 delivery service is connetion-oriented. True or false

TRUE

30

Sliding windows is less efficient than stop-and wait flow control. True or false

FALSE

31

Between a sender and receiver, parity can be eve, odd, or both at the same time? True or false?

FALSE

32

The most powerful error detection technique is cyclical redundancy checking. True or false

TRUE

33

A common bit-oriented protocal is Ethernet. True or false.

FALSE

34

Term used to describe the structure of binary bits at the dat link layer.

Frame

35

Error control at the data link layer is composed of 3 elements. True or false

FALSE

36

Type 2 PDUs will have information and supervisory frames. True or False

TRUE

37

Even parity is usually associated with this type of transmission:

synchronous

38

With CRC, the core message data is treated line one long _______________ number

binary

39

The sliding windows method uses a _____________ _____________ field to control the windows buffer.

sequencing number

40

Stop and wait canhave one acknowledgement for several frames. True or false.

FALSE

41

Bit-oriented protocols are also called character-oriented. True or false

FALSE

42

Synchronous protocols are more efficient than asynchronous protocols. True or false

TRUE

43

With longitudinal redundancy checking, only the receiver needs to perform a block check calculation. True or false

FALSE

44

A common bit-oriented protocal is HDLC. True or false.

TRUE

45

The components of error control include _____________ and __________________

detection and correction

46

Term that describes getting a grame from point A to point B is called _______________ ____________

delivery service

47

Does not require a predefined or permanent cirucuit

connectionless

48

Line discipline controls?

which device can communicate when

49

Asynchronous protocols are used extensively by models. True or false

TRUE

50

The data link layer is the 2nd lowest level layer. True or false

true - supervisory frames do NOT have a data field

51

For stop and wait flow control, the effect that more and smaller frames woul have make it more or less efficient

less efficient

52

The High-Level data link control (HDLC) protocol is a standard of the ANSI. True or false

FALSE

53

The portion of the 802 stack associated with internetworking

802.1

54

Point to point circuits do not require line discipline. True or false

FALSE

55

Type of frame that does not have a data field

supervisory