NIELIT A Level Solved Paper January-2014

 January, 2014

A9-R4: DATA COMMUNICATION & NETWORK TECHNOLOGIES

PART ONE

(Answer all the questions)

1. Each question below gives a multiple choice of answers. Choose the most appropriate one and enter in the “OMR” answer sheet supplied with the question paper, following instructions therein. (1x10)

1.1 Class A network with address 10.0.0.0 with 40 subnets is required to add 60 new subnets very
soon. Which subnet mask should be assigned to network?
A) 255.240.0.0
B) 255.248.0.0
C) 255.252.0.0
D) 255.254.0.0
1.2 Which of the following is done in the physical layer of the ATM network?
A) Monitoring of the user information field for bit errors and possible corrective actions
B) Transmission frame generation/recovery
C) Generic flow control
D) Cell multiplexing and demultiplexing

NIELIT A Level Solved Paper July-2013

July, 2013

A9-R4: DATA COMMUNICATIONS AND NETWORK TECHNOLOGIES

PART ONE

(Answer all the questions)

1. Each question below gives a multiple choice of answers. Choose the most appropriate one and enter in the “OMR” answer sheet supplied with the question paper, following instructions therein. (1x10)

1.1 Performance of a network can be measured by considering ________.
A) transit time
B) response time
C) both A) and B)
C) none of the above
1.2 The term ________ refers to the way in which a network is laid out physically.
A) physical topology
B) conceptual structure
C) network design
D) none of the above

NIELIT A Level Solved Paper Jan-13

January, 2013

A9-R4: DATA COMMUNICATION & NETWORKS TECHNOLOGIES

PART ONE

(Answer all the questions)

1. Each question below gives a multiple choice of answers. Choose the most appropriate one and enter in the “tear-off” answer sheet attached to the question paper, following instructions therein. (1x10)

1.1 Interleaved digital signals from n devices forming frame of data take place in
A) FDM
B) TDM
C) WDM
D) None of the above
1.2 Upper support layers - session, presentation and application of OSI model are almost
invariably implemented in
A) Hardware (only)
B) Software (only)
C) Hardware and Software both
D) None of the above

NIELIT A Level Solved Paper July-2012

July, 2012

A9-R4: DATA COMMUNICATION AND NETWORKS TECHNOLOGIES

PART ONE

(Answer all the questions)

1. Each question below gives a multiple choice of answers. Choose the most appropriate one and enter in the “tear-off” answer sheet attached to the question paper, following instructions therein. (1x10)

1.1 In TCP/IP, Packets may arrive out of sequence (they may have been routed differently, or
one may have been dropped), so the ________ in each packets allow TCP to reassemble
the packets in the correct order and to request retransmission of any missing packets
A) Sequence numbers
B) Port numbers
C) Source_id number
D) Reassembling of the packets in the correct order is not permitted
1.2 UDP is a fast, unreliable protocol and unreliable means there is
A) No sequencing
B) No guaranteed delivery
C) No automatic retransmission of lost packets
D) All of the above