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WorksheetsComputer Networks CT-2
Total questions: 20
Worksheet time: 40mins
The data link layer takes the packets from _________ and encapsulates them into frames for transmission.
network layer
physical layer
transport layer
application layer
Automatic repeat request error management mechanism is provided by ________.
media access control sublayer
logical link control sublayer
network interface control sublayer
application access control sublayer
In a Go-Back-N ARQ, if the window size is 63, what is the range of sequence numbers?
0 to 63
0 to 64
1 to 63
1 to 64
ARQ stands for _______.
Automatic repeat quantization
Automatic retransmission request
Automatic repeat request
Acknowledge repeat request
_________framing uses two categories of protocols: character-oriented and bit-oriented.
Variable-size
Standard
Fixed-size
None of the above
Which of the following is a data link protocol?
ethernet
point to point protocol
hdlc
all of the mentioned
The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called ____________.
cyclic redundancy check
piggybacking
fletcher’s checksum
parity check
In ________ protocols, we use ________.
byte-oriented; bit stuffing
character-oriented; bit stuffing
bit-oriented; bit stuffing
none of the above
_______ control refers to a set of procedures used to restrict the amount of data that the sender can send before waiting for acknowledgment.
Flow
Error
Transmission
none of the above
The Simplest Protocol and the Stop-and-Wait Protocol are for ______ channels.
noiseless
noisy
either (a) or (b)
neither (a) nor (b)
The _______Protocol has flow control, but not error control.
Stop-and-Wait
Simplest
Go-Back-N ARQ
Selective-Repeat ARQ
Both Go-Back-N and Selective-Repeat Protocols use a _________.
sliding frame
sliding packet
sliding window
none of the above
In Go-Back-N ARQ, if 5 is the number of bits for the sequence number, then the maximum size of the receive window must be _____.
15
16
1
31
The most common protocol for point-to-point access is the Point-to-Point Protocol (PPP), which is a _________protocol.
byte-oriented
bit-oriented
character-oriented
none of the above
In _________, the station configuration is unbalanced. We have one primary station and multiple secondary stations.
ARM
NBM
NRM
ABM
In PPP, the ________ is responsible for establishing, maintaining, configuring, and terminating links.
LCP
NCP
PAP
CHAP
Both HDLC and PPP are Data link layer protocols.
True
False
PPP provides the _______ layer in the TCP/IP suite.
Network
Link
Transport
Application
The link necessarily begins and ends with this phase. During the ______ phase, the LCP automata will be in INITIAL or STARTING states.
Link establishment phase
Link-termination phase
Link dead phase
Authentication phase
Which category of HDLC frames undergoes error and flow control mechanisms by comprising send and receive sequence numbers?
S-frames
U-frames
I-frames
All of the above
