Computer Network | CN | MCQ

Question 1
What is the major application of UDP
Select one:
a. Small office network
b. Multimedia
c. Scheduling
d. LAN communication
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Question 2
Which of the methods mentioned below is not a valid Request Header?
Select one:
a. Host
b. Accept-Language
c. Set-Cookie
d. If-Modified-Since
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Question 3
How long does it take to send a file of 384,000 bits from host A to host B over a circuit-switched network?
Assume the following:
• All link speeds are 1.536 Mbps
• Each link uses TDM with 8 slots/sec
• 400 msec are required to establish end-to-end circuit
Select one:
a. 2.4 secs
b. 0.9 secs
c. 2.04 secs
d. 0.65 secs
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Question 4
What is the total size of TCP Segment
Select one:
a. 16 bits
b. 8 bits
c. 64 bits
d. 32 bits
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Question 5
Suppose within your web browser you click on a link to obtain a Web page. The IP address of the associated URL is cached in your local host, so a DNS lookup is not necessary to obtain the IP address. Suppose that the webpage associated with the link contains exactly one object consisting of a small amount of HTML text, which references 10 very small objects on the same server. Let RTT’ denote the RTT between the local host and the server containing the object. Assuming zero transmission time of the object. How much time is needed to get the to retrieve the web page fully, in the following cases:
a. Non-persistent HTTP with no parallel TCP connections?
b. Persistent HTTP?
.Select one:
a. 22RTT’, 3RTT’
b. 20RTT’, 3RTT’
c. 20RTT’, 2RTT’
d. 22RTT’, 2RTT’
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Question 6
. ……… is designed for the connectionless protocol such as User Datagram Protocol(UDP).
Select one:
a. Stream socket
b. . Raw socket
c. . Datagram socket
d. Berkeley socket
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Question 7
Which of the following statements regarding the Internet Structure is FALSE?
Select one:
a. A Tier 3 or Local ISP may decide to be a direct customer of a Tier 1 ISP
b. Each Tier 2 or Regional ISP is a customer of one or more Tier 1 ISPs
c. A Tier 1 ISP has a national or international coverage over a wide area, and has a network consisting of high end routers and links with high bandwidth
d. A Tier 2 ISP cannot peer privately with one or more Tier-2 ISPs
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Question 8
What is the solution for Silly Window syndrome in TCP
Select one:
a. Karn Partridge Algorithm
b. Nagles Algorithm
c. Sliding Window Protocol
d. Go-Back N protocol
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Question 9
The time difference between the instant at which a transport connection is requested and the instant at which it is confirmed is called as ……..
Select one:
a. Priority delay
b. Protection delay
c. Transit delay
d. Connection establishment delay
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Question 10
What is the average rate for fairness in TCP for K sessions with R bandwidth
Select one:
a. (R/K )+1
b. K/R
c. (K/R)+1
d. R/K
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Question 11
Sequence the following actions for the interaction between a web browser and a web server.
A. Browser requests a webpage using HTTP.
B. Browser establishes a TCP connection with the web server.
C. Server sends the requested webpage using HTTP.
D. Browser resolves the domain name using DNS.
Select one:
a. 1,3,2,4
b. 4,2,1,3
c. 1,2,3,4
d. 2,3,4,1
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Question 12
Which command provides information about delay measurement from source to destination?
Select one:
a. Traceroute
b. Nslookup
c. Netstat
d. None
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Question 13
In the following which term , refers to a set of procedures used to restrict amount of data that sender can send before waiting for acknowledgment is
Select one:
A. error control
B. flow control
C. ADSL
D. byte stuffing
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Question 14
………. needs ports or service access points.
Select one:
a. Network layer
b. Data Link layer
c. Physical Layer
d. Transport layer
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Question 15
Applications that need to talk across a network uses __________ for communication with the end-node (destination)
Select one:
a. Sockets
b. Semaphores
c. Shared memory
d. Message queues
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Question 16
Among the network topologies listed below, which would be the preferred WAN design to implement for a company with a hierarchical structure i.e. with main, regional and branch offices, where information is exchanged from main to regional to branch offices and vice-versa?
Select one:
a. Partial Mesh
b. Ring
c. Tree
d. Double-Ring
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Question 17
Error Control and Flow Control are responsibilities of
Select one:
a. data link and network Layers
b. data link and Physical Layer
c. Application and Presentation Layer
d. data link and Transport Layer
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Question 18
What is the size of Urgent pointer in TCP segment
Select one:
a. 16 bits
b. 8 bits
c. 32 bits
d. 24 bits
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Question 19
What is the total size of source field of UDP Checksum
Select one:
a. 16 bits
b. 24 bits
c. 8 bits
d. 32 bits
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Question 20
The following application layer protocol spec specifies support for both TCP and UDP at the transport layer:
Select one:
a. HTTP
b. Telnet
c. FTP
d. DNS
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Question 21
Collaborative Web and Semantic Web are also referred as:
Select one:
a. Both Web 3.0
b. Web 2.0 and Web 3.0 respectively
c. Both Web 2.0
d. Web 1.0 and Web 2.0 respectively
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Question 22
Which of the following statements regarding network devices is incorrect?
Select one:
a. Switches may operate both at the data link and the network layer
b. Bridges operate at the data link layer
c. Repeaters operate at the physical layer
d. Hubs operate at the data link layer
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Question 23
Which of the following is/are example(s) of stateful application layer protocols?
(i) HTTP
(ii) FTP
(iii) TCP
(iv) POP3
Select one:
a. 1,2,3
b. 2,4
c. 1,3,4
d. 2,3
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Question 24
What is the header size of the UDP packet format
Select one:
a. 24 bits
b. 8 bytes
c. 32 bits
d. 16 bytes
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Question 25
Which of the following are the protocol data units at the Application and Network Layer respectively?
Select one:
a. Packet, Segment
b. Message, Segment
c. Segment, Packet
d. Message, Packet
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Question 26
Which of the statements below does not apply to Circuit Switched Networks?
Select one:
a. Dedicated resources used for transmission from source to destination
b. A call set up is required before the data can be sent from the source to the destination
c. Once a particular call has been set up between the source and destination, data fragmented at the routers can be sent along different paths to the destination
d. Can be implemented using Time Domain Multiplexing as well as Frequency Domain Multiplexing
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Question 27
An organization’s LAN that connects the end systems of the users to the edge router is part of :
Select one:
A. Network Edge Laye
B. Network Core Layer
C. Network Access Layer
D. None
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Question 28
Which of the status codes is returned as part of the HTTP Response if the requested content on the server is unchanged?
Select one:
304
301
306
302
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Question 29
In a TCP connection between a sender and receiver, which variables are maintained by the sender and receiver, respectively, for flow control?
Select one:
a. Sender: LastByteRead, LastByteRcvd; Receiver: LastByteSent, LastByteAcked
b. Sender: LastByteSent, LastByteAcked; Receiver: LastByteRead, LastByteRcvd
c. Sender: LastByteSent, LastByteRcvd; Receiver: LastByteRead, LastByteAcked
d. Sender: LastByteRead, LastByteAcked; Receiver: LastByteSent, LastByteRcvd
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Question 30
14.Which of the statements below about HTTP is incorrect?
Select one:
a. Compared to using a persistent connection, a non-persistent connection leads to more round trips between the client and server
b. Cookies are used to maintain state at sender/receiver over multiple connections
c. If HTTP Version 1.1 is used, connections between client and server are non-persistent by default
d. HTTP is basically a stateless protocol where the Web server does not maintain information about past requests from a client
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