Previous year question for Computer Science and Engineering Data communication & networking

Sub Code: - 1618502

Time : 3Hrs
         Sem. V(New)                   
  Data communication Network  (CSE)

Full Marks : 70
Pass marks : 28
Group A

Choose the most suitable answer from the following options: -   (1*20=20)

(i) In the layer hierarchy as the data packet moves from the upper to the lower layers headers are.
(a) Added
(b) Removed
(c) Rearranged
(d) Modified

(ii) The first Network

(iii) These factors affect transmission rate in DSL 
(a) the gauge of the twisted-pair line 
(b) degree of electrical interface 
(c) shadow fading
(d) Both a and b

(iv) HFC contains
(a) Fiber cable
(b) Coaxial cable
(c) Both a and b
(d) none

(v)  Which they are presented
(a) Semantics
(b) Syntax
(c) Timing 
(d) All of the above

(vi) Transmission data rate is decided by
(a) Network layer
(b) Physical layer
(c) Data link layer
(d) Transport layer

(vii) In DNS tel-co provides these service 
(a)  Wired phone access
(b) ISP
(c) All of the mentioned above
(d) None of the mentioned

(viii) Which one of the following is not a function of network layer?
(a) Routing
(b) Inter-networking
(c) Congestion control
(d) None of the mentioned

(ix) Header of a frame generally contains
(a) Synchronization bytes
(b) Address
(c) frame identifier
(d) All of the mentioned

(x) User data-gram protocol is called connection-less because 
(a) All UDP packets are treated independently by transport layer
(b) It should data as a stream of related packets  
(c)It is received in the same of related packets
(d) None of the mentioned

(xi) Which transmission media has the highest transmission speed in a network
(a) Coaxial cable
(b)Twisted pair cable
(c)Optical fiber
(d)Electrical cable

(xii) Common gateway interface is used to
(a) Generate executable files from web content by web server
(b) Generate web server
(c) Stream videos
(d) None of the mentioned
 (xiii) Physical or logical arrangement of network is
(a) Topology
(b) Routing
(c) Networking
(d) None

(xiv) Data communication system spanning ststes countries or the whole world is
(a) LAN

(xv) TCP groups a number of bytes together into a packet called
(a) Packet
(b) Buffer
(c) Segment
(d) stack

(xvi) Which multiple access techniques is used by IEEE802.11 standard for wireless LAN ?
(a) CDMA
(d) None

(xvii) What is WPS
(a)Wi-fi protected access
(b) Wired protected access  
(c) Wired process access
(d)Wi-fi process access

(xviii) The DOS attack is which the attacker sends deluge of packets to the targeted host.
(a) Vulnerability attack 
(b) Bandwidth flooding
(c)  Connecting flooding
(d) All of the mentioned

(xix) Method(s) to move data through a network of links and switches
(a) Packet switching
(b) Circuit switching
(c) Line switching
(d) (a) and (b) both

(xx) The number of layers in internet protocol stack
(a) 5
(b) 7
(c) 6
(d) None

Group B
➥ Answer all Five Questions: -                         (5*4=20) 

1. Explain the concept of MODEM and its roles.
Define at-least two protocol.

2. Differentiate between synchronous and asynchronous transmission.
What are the advantages of computer data communication.

3.  Explain point to point transmission.
Explain point to multi point transmission.

4. Explain communications system and also define signal and data?
What do you understand by computer network? Discuss its need.

5. Explain all the three guided transmission media.
Explain channel bandwidth in brief.

Group C 
➥ Answer all Five Questions: -                         (5*6=30) 

6. Explain TCP/IP model in detail.
What are the difference between a port address, a logical address and a physical address?

7. Explain different mode of transmission in a computer network in detail.
What do you mean by data communication and discuss its characteristic sin detail.

8. Explain the concept of modulation with PCM and several shift keying.
Write in detail about circuit switching and packet switching.

9. Explain different methods of digital signal transmission.
Discuss in detail about transmission impairments.

10. Define analog transmission. Define carrier signal and its role in analog transmission.
Write short notes on (any two)
a) Domain Name Server
b) FDM (Frequency Division Multiplexing)
c) TDM (Time Division Multiplexing)

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