NWC203 FE Guaranteed Success
Q.24 The DNS protocol runs over and uses port
A HTTP 53
B. TCP 51
C. UDP 51
D. TCP 52
E. UDP. 53
E
Q1-In TCP congestion control, two important variables the sender has to keep track area.
A.Congestion window and the threshold.
B.Congestion window and...
Q1-In TCP congestion control, two important variables the sender has to keep track area.
A.Congestion window and the threshold.
B.Congestion window and socket number.
C.Threshold and Receiving windowd.
D.MSS and RTT
A
Q2-The physical layer of the receiving device passes bits up to which higher level layer?
A. application
B. presentaiton
C. network
D. data link
D. data link
Q3-Which two applications would use the TCP transport layer protocol?
A. FTP and HTTP
B. FTP and ICMP
C. ICMP and VoiLP
D. HTTP and TFTP
A.FTP and HTTP
Q-4 What is the subnetwork number of a host with an IP address of 172.16.66.0/21
172.16.64.0
,Q-5A service offered at a given layer can include which of the following feature(s)
a, Sequencing
b, Reliability
c, Timing
d, All of the above
d
Q6-The divisor in a cyclic code is normally called the___________________
A. Degree
B. Redundancy
C. Generator
D. None of the others
C
Q7-A _____ is a system to digital message formats and rules for exchanging those messages in or
between computing systems and in telecommunications.
(A) Communication Protocol
(B) Modem
(C) DNS
(D) Router
A
Q8-Which of the following is a type of router defined in OSPF
A. Internal router
B. Area border router
C. Backbone router
D. All of the above
D
Q9-In HTTP, the first line in a request message is called a________line and the first line in the response
message called the_____line
A. request; status
B. request; response
c. response; request
D. response; status
A
Q10-What term describes a policy that allows network devices to manage the flow of data to give
priority to voice and video?
A.quality of service
B.internet
C.intranet
, D.extranet
A
Q11-A client/server network, the user’s computer is considered the
A.client
B.website
C.server
D.hoster
A
Q-12 ____ is a system in which computers are inter-connected and the geographical spread may be
within a building to 1 kilometer.
(A) LAN
(B) WAIN
(C) Main
(D) All of these
A
Given 3 bits for sequence numbers in Selective Repeat ARQ. If the sender already set the sliding window
size to be 4, what is the maximum sliding window size at the receiver?
A, 3
B, 8
C, 7
D, None of the above
D
Q-14 Local Area Network that allows their computers to share files, data, printers and other resources
are called
(A) Usenet
(B) Extranet
(C) Internet
(D) Intranet
D
Q-15 WHAT HAPPENS IF ACK/NAK IN RDT2 2.0 CORRUPTED?
A Receiver will re-send ACK/NAK after timeout
B Sender does not know what happended ar receiver
C Sender will re-send data after timeout
D None of the other
B-->sender doesn't know what happened at receiver!
-->can't just retransmit: possible duplicate
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