NIELIT A Level Solved Paper January-2016

January, 2016

A9-R4: DATA COMMUNICATIONS & 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 Which is not a component of data communication?
A) Message
B) Sender
C) Receiver
D) None of the above
1.2 Which is a connectionless internet transport protocol?
A) IMAP
B) IP
C) UDP
D) TCP

NIELIT A Level Solved Paper July-2014

July, 2015

A9-R4: DATA COMMUNICATION 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 Which of the following lines that are used by the telephone companies to provide high-data-rate
connections also use the high-bandwidth capability of unshielded twisted-pair cables?
A) PSTN
B) Full duplex
C) Fiber optics
D) DSL
1.2 The LLC provides how many data link control protocol for all types of IEEE LANs?
A) One
B) Two
C) Four
D) Eight

NIELIT A Level Solved Paper January-2015

January, 2015

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 The process-to-process delivery of the entire message is the responsibility of the
________ layer.
A) Network
B) Transport
C) Application
D) Physical
1.2 Which protocol is used for file transferring?
A) SMTP
B) FTP
C) Both A) and B)
C) None of the above

NIELIT A Level Solved Paper July-2014

 July, 2014

A9-R4: DATA COMMUNICATION 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 Which of the following statement is NOT true with respect to Differential Phase Shift Keying
(DPSK)?
A) DPSK has the advantage of reduced receiver complexity
B) Energy efficiency of DPSK is inferior to that of coherent PSK by about 3 dB
C) DPSK is a general type of phase modulation that conveys data by changing the phase of the
carrier wave
D) DPSK is a coherent form of phase shift keying which needs a coherent reference signal at
the receiver
1.2 Wave Division Multiplexing (WDM) is an analog multiplexing technique to combine
________ signals.
A) Optical
B) Audio
C) Video
D) Noise