tcp_ip protocol suite _.pdf

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TCP/IP Protocol Suite, 4/e

Student EditionStudent SolutionsChapter 01 Multi...Chapter 02 Multi...Chapter 03 Multi...Chapter 04 Multi...Chapter 05 Multi...Chapter 06 Multi...Chapter 07 Multi...Chapter 08 Multi...Chapter 09 Multi...Chapter 10 Multi...Chapter 11 Multi...Chapter 12 Multi...Chapter 13 Multi...Chapter 14 Multi...Chapter 15 Multi...Chapter 16 Multi...Chapter 17 Multi...Chapter 18 Multi...Chapter 19 Multi...Chapter 20 Multi...Chapter 21 Multi...Chapter 22 Multi...Chapter 23 Multi...Chapter 24 Multi...Chapter 25 Multi...Chapter 26 Multi...Chapter 27 Multi...Chapter 28 Multi...Chapter 29 Multi...Chapter 30 Multi...

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Results ReporterOut of 49 questions, you answered 29 correctly, for a final grade of 59%.

29 correct (59%)20 incorrect (41%)0 unanswered (0%)

Your Results:The correct answer for each question is indicated by a .

1 CORRECT TCP is a __________protocol.

A)streamoriented

B)messageoriented

C)blockoriented

D)None of the choices are correct

2 CORRECT TCP groups a number of bytes together into a packet called a___________.

A)user datagram

B)segment

C)datagram


3 CORRECT TCP is a(n) ___________ protocol.

A)connectionoriented

B)connectionless

C)unreliable


4 CORRECT TCP is a(n) _______ transport protocol.

A)unreliable

B)besteffort delivery

C)reliable


5 CORRECT TCP uses _________________ to check the safe and sound arrival ofdata.

A)an acknowledgment mechanism

B)outofband signalling

C)the services of another protocol


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6 CORRECT The bytes of data being transferred in each connection are numberedby TCP. The numbering starts with a __________________.

A)0

B)1

C)randomly generated number


7 CORRECTTCP assigns a sequence number to each segment that is being sent.The sequence number for each segment is the number of the _______byte carried in that segment.

A)first

B)last

C)middle


8 CORRECT Communication in TCP is ___________.

A)simplex

B)halfduplex

C)fullduplex


9 CORRECTThe value of the acknowledgment field in a segment defines thesequence number related to the ______byte a party expects toreceive.

A)first

B)last

C)next


10 CORRECT The inclusion of the checksum in the TCP segment is ________.

A)optional

B)mandatory

C)at the discretion of the application program


11 CORRECT A TCP segment is encapsulated in __________.

A)an IP datagram

B)an Ethernet frame

C)a UDP user datagram


12 CORRECT A SYN segment cannot carry data; it consumes _____ sequencenumber(s).

A)no

B)one

C)two


13 INCORRECT A SYN + ACK segment cannot carry data; it consumes _____ sequencenumbers.

A)no

B)three

C)two


14 CORRECT An ACK segment, if carrying no data, consumes ______ sequencenumber(s).



A)no

B)one

C)two


15 CORRECT The connection establishment procedure in TCP is susceptible to aserious security problem called the _________ attack.

A)ACK flooding

B)FIN flooding

C)SYN flooding


16 CORRECT The SYN flooding attack belongs to a group of security attacks knownas a _____ attack.

A)denial of service

B)replay

C)maninthe middle


17 INCORRECT The FIN segment consumes ____ sequence numbers if it does notcarry data.

A)two

B)three

C)no


18 INCORRECT The FIN + ACK segment consumes _____ sequence number(s) if itdoes not carry data.

A)two

B)three

C)one


19 INCORRECT In TCP, one end can stop sending data while still receiving data. This iscalled a ______.

A)halfclose

B)halfopen

C)oneway termination


20 CORRECT A(n) _________ machine is a machine that goes through a limitednumber of states.

A)infinite state

B)finite state

C)both a and b


21 CORRECT A common value for MSL is between___ seconds and ___ minute(s).

A)30: 2

B)30; 1

C)50; 1


22 CORRECT To accomplish flow control, TCP uses a ___________ window protocol.

A)limitedsize

B)sliding

C)fixedsize




23 CORRECT TCP sliding windows are __________ oriented.

A)packet

B)segment

C)byte


24 CORRECT In TCP, the size of the send window is the ________ of rwnd and cwnd.

A)maximum

B)sum of

C)minimum


25 INCORRECT In TCP, the window should not be _________.

A)opened

B)closed

C)shrunk


26 INCORRECTIn TCP, the receiver can temporarily shut down the window; thesender, however, can always send a segment of _____ byte(s) afterthe window is shut down.

A)ten

B)zero

C)one


27 CORRECTA serious problem can arise in the sliding window operation wheneither the sending application program creates data slowly or thereceiving application program consumes data slowly, or both. Thisproblem is called the ______.

A)silly window syndrome

B)unexpected syndrome

C)window bug


28 CORRECT Nagle's algorithm can solve the silly window syndrome created by the_________.

A)sender

B)receiver

C)both sender and receiver


29 CORRECT Clark's solution can solve the silly window syndrome created by the_________.

A)sender

B)receiver



30 INCORRECT Delayed acknowledgment can solve the silly window syndrome createdby the _________.

A)sender

B)receiver





31 CORRECT ACK segments consume _______ sequence number(s) and _______acknowledged.

A)no; are not

B)one; are not

C)no; are


32 CORRECTIn modern implementations of TCP, a retransmission occurs if theretransmission timer expires or ________ duplicate ACK segmentshave arrived.

A)one

B)two

C)three


33 INCORRECT In TCP, ________ retransmission timer is set for an ACK segment.

A)one

B)a previous

C)no


34 CORRECT Lost acknowledgments may create a _______ if they are not handledproperly.

A)livelock

B)deadlock

C)retransmission


35 INCORRECT In the ________ algorithm the size of the congestion window increasesexponentially until it reaches a threshold.

A)congestion avoidance

B)congestion detection

C)slow start


36 INCORRECT In the __________ algorithm the size of the congestion windowincreases additively until congestion is detected.

A)congestion avoidance

B)congestion detection

C)slow start


37 INCORRECT In the congestion detection algorithm, if detection is by a timeout, anew _______ phase starts.

A)slow start

B)congestion avoidance

C)congestion detection


38 CORRECT In the congestion detection algorithm, if detection is by three ACKs, anew _______ phase starts.

A)slow start

B)congestion avoidance

C)congestion detection


39 INCORRECT In TCP, there can be ______ RTT measurement(s) in progress at anytime.

A)two



B)only one

C)several


40 CORRECT The value of the window scale factor can be determined during__________.

A)data transmission

B)connection establishment

C)connection termination


41 CORRECT Multiply the header length field by _______ to find the total number ofbytes in the TCP header.

A)2

B)4

C)6


42 INCORRECT Urgent data requires the urgent pointer field as well as the URG bit inthe _______ field.

A)control

B)offset

C)sequence number


43 INCORRECT The options field of the TCP header ranges from 0 to _______ bytes.

A)10

B)20

C)40


44 INCORRECT Which option defines the maximum number of bytes in a TCP segment?

A)maximum segment size

B)window scale factor

C)timestamp


45 INCORRECT If the ACK value is 200, then byte _______ has been receivedsuccessfully.

A)199

B)200

C)201


46 INCORRECT The _______ timer prevents a long idle connection between two TCPs.

A)retransmission

B)persistence

C)keepalive


47 INCORRECT The _______ timer is needed to handle the zero windowsizeadvertisement.

A)retransmission

B)persistence

C)keepalive




48 INCORRECT Karn's algorithm is used in calculations by the _______ timer.

A)retransmission

B)persistence

C)keepalive


49 INCORRECT A special segment called a probe is sent by a sending TCP when the_______ timer goes off.

A)transmission

B)persistence

C)keepalive


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