NR

Code.No: 15049

SET-1

b] c]

3.a] b

Describe how flow control and error control are implemented in seven layer OSI model. List the common features of synchronous and asynchronous data communication modems. Describe in brief how synchronization and equilization are provided in voice band modems through training sequence and c-type conditioning respectively. [6+5+6]

or ld

2.a]

.in

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD III.B.TECH - I SEMESTER SUPPLEMENTARY EXAMINATIONS NOVEMBER, 2009 DATA COMMUNICATIONS (Common to CSE, CSIT, CSS) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks --1a] Reason out why layered architecture is preferred for computer communications? b] Draw the seven layer OSI protocol hierarchy and describe the functions of each and every ISO layer of OSI architecture. [8+8]

Draw the frame structure of SDLC format. Describe the size and functionality included in every field of SDLC frame. Describe how error control is implemented when data transfer between two stations is done using HDLC frames. [8+8] Describe datagram and virtual circuit switching methods of packet switching networks. Describe the features, specifications and methods of implementation of voice modems. [8+8]

5.a]

What are different types of Ethernet local area networks possible. List the specifications and limitations of different types of Ethernet architectures. Describe the procedures used to authenticate data in data communication networks. [8+8]

b]

Describe objectives, architectures, interface units of integrated services digital network used in telephone communications. Describe the configuration of header field and information fields of and ATM cell structure. [8+8]

nt

6.a]

uW

4.a] b]

b]

Draw and describe the frame structure of SONET specifying various header and information fields with in the frame. What are the network topologies in which telephone communication can be done via SONET. Illustrate with examples and architectural diagrams. [8+8]

Aj

7.a]

b]

8.

Write short notes on the following: a] Frame Relay b] Point-to-Point protocols in local area networks. ****

[8+8]

NR

Code.No: 15049

SET-2

1.a] b

.in

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD III.B.TECH - I SEMESTER SUPPLEMENTARY EXAMINATIONS NOVEMBER, 2009 DATA COMMUNICATIONS (Common to CSE, CSIT, CSS) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---

Draw the frame structure of SDLC format. Describe the size and functionality included in every field of SDLC frame. Describe how error control is implemented when data transfer between two stations is done using HDLC frames. [8+8] Describe datagram and virtual circuit switching methods of packet switching networks. Describe the features, specifications and methods of implementation of voice modems. [8+8]

3.a]

What are different types of Ethernet local area networks possible. List the specifications and limitations of different types of Ethernet architectures. Describe the procedures used to authenticate data in data communication networks. [8+8]

6.a] b]

7.a] b]

Draw and describe the frame structure of SONET specifying various header and information fields with in the frame. What are the network topologies in which telephone communication can be done via SONET. Illustrate with examples and architectural diagrams. [8+8] Write short notes on the following: a] Frame Relay b] Point-to-Point protocols in local area networks.

nt

8.

Describe objectives, architectures, interface units of integrated services digital network used in telephone communications. Describe the configuration of header field and information fields of and ATM cell structure. [8+8]

uW

b]

or ld

2.a] b]

Reason out why layered architecture is preferred for computer communications? Draw the seven layer OSI protocol hierarchy and describe the functions of each and every ISO layer of OSI architecture. [8+8]

Aj

1a] b]

2.a]

b]

c]

[8+8]

Describe how flow control and error control are implemented in seven layer OSI model. List the common features of synchronous and asynchronous data communication modems. Describe in brief how synchronization and equilization are provided in voice band modems through training sequence and c-type conditioning respectively. [6+5+6] ****

NR

Code.No: 15049

SET-3

3.a] b]

4.

5a] b]

6.a]

Draw and describe the frame structure of SONET specifying various header and information fields with in the frame. What are the network topologies in which telephone communication can be done via SONET. Illustrate with examples and architectural diagrams. [8+8] Write short notes on the following: a] Frame Relay b] Point-to-Point protocols in local area networks. [8+8] Reason out why layered architecture is preferred for computer communications? Draw the seven layer OSI protocol hierarchy and describe the functions of each and every ISO layer of OSI architecture. [8+8] Describe how flow control and error control are implemented in seven layer OSI model. List the common features of synchronous and asynchronous data communication modems. Describe in brief how synchronization and equilization are provided in voice band modems through training sequence and c-type conditioning respectively. [6+5+6]

nt

b]

or ld

b]

Describe objectives, architectures, interface units of integrated services digital network used in telephone communications. Describe the configuration of header field and information fields of and ATM cell structure. [8+8]

uW

2.a]

.in

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD III.B.TECH - I SEMESTER SUPPLEMENTARY EXAMINATIONS NOVEMBER, 2009 DATA COMMUNICATIONS (Common to CSE, CSIT, CSS) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks --1.a] What are different types of Ethernet local area networks possible. List the specifications and limitations of different types of Ethernet architectures. b] Describe the procedures used to authenticate data in data communication networks. [8+8]

c]

Draw the frame structure of SDLC format. Describe the size and functionality included in every field of SDLC frame. Describe how error control is implemented when data transfer between two stations is done using HDLC frames. [8+8]

Aj

7.a] b

8.a] b]

Describe datagram and virtual circuit switching methods of packet switching networks. Describe the features, specifications and methods of implementation of voice modems. [8+8] ****

NR

Code.No: 15049

SET-4

2.

3a] b]

4.a] b] c]

5.a] b

Write short notes on the following: a] Frame Relay b] Point-to-Point protocols in local area networks. [8+8] Reason out why layered architecture is preferred for computer communications? Draw the seven layer OSI protocol hierarchy and describe the functions of each and every ISO layer of OSI architecture. [8+8]

or ld

b]

Draw and describe the frame structure of SONET specifying various header and information fields with in the frame. What are the network topologies in which telephone communication can be done via SONET. Illustrate with examples and architectural diagrams. [8+8]

Describe how flow control and error control are implemented in seven layer OSI model. List the common features of synchronous and asynchronous data communication modems. Describe in brief how synchronization and equilization are provided in voice band modems through training sequence and c-type conditioning respectively. [6+5+6]

uW

1.a]

.in

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD III.B.TECH - I SEMESTER SUPPLEMENTARY EXAMINATIONS NOVEMBER, 2009 DATA COMMUNICATIONS (Common to CSE, CSIT, CSS) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---

Draw the frame structure of SDLC format. Describe the size and functionality included in every field of SDLC frame. Describe how error control is implemented when data transfer between two stations is done using HDLC frames. [8+8] Describe datagram and virtual circuit switching methods of packet switching networks. Describe the features, specifications and methods of implementation of voice modems. [8+8]

7.a]

What are different types of Ethernet local area networks possible. List the specifications and limitations of different types of Ethernet architectures. Describe the procedures used to authenticate data in data communication networks. [8+8]

Aj

nt

6.a] b]

b]

8.a]

b]

Describe objectives, architectures, interface units of integrated services digital network used in telephone communications. Describe the configuration of header field and information fields of and ATM cell structure. [8+8]

****

CS3123 DATA COMMUNICATIONS SET-1

4.a] Describe datagram and virtual circuit switching methods of packet switching networks. b] Describe the features, specifications and methods of ...

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