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Assignment No. 2 Semester Spring 2012 Data Communication - CS
Total Marks: 25
Due Date: 30-04-
GOOD LUCK
Q:
Match the protocols given in Column B with its associated layers given in Column A and write the correct protocol against each layer of Column A in Column C. [Marks 5]
Column A Column B Column C LAYERS PROTOCOLS Correct Choice
Application layer TCP FTP
Transport layer Line code TCP
Network layer ARP IP
Data link layer FTP ARP
Physical layer IP Line Code
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Q: 2
In 3 rd^ column specify / write the appropriate choice from these three choices (header, trailer and N/A). For example, if a layer does not deal with header or trailer, write N/A in front of that particular layer and so on. In 4 th^ column, specify the appropriate choice from these five choices (data, segment, packet, frame, bits) to its respective layer. Give short description of the functionality of each layer of OSI model within the provided area in column 5. [Marks 20]
Note: The answer of this question is only acceptable if it is written in the following template.
1 2 3 4 5 Sr. No.
Layer Name
Header/Trailer/ N/A
Data Unit Functionality
1 Application Header Data Providing network services for application processes, such as file, print, messaging and database services.
2 Presentation Header Data
Providing standard interface to data for the application layer. Performing MIME encoding, data encryption, conversion, formatting and compression.
3 Session Header Data
Providing Inter-host communication. Establishing, managing and terminating connection between applications.
4 Transport Header Segments
Enabling end-to-end connections and reliability. Performing Flow control and segmentation/de- segmentation of data in proper sequence.
5 Network Header Packets Dealing with Logical addresses, path determination (Routing) and reporting delivery errors.
6 Data Link Header / Trailer Frames
Dealing Physical addresses and access to media. Contains two sub-layers: Logical Link Control (LLC) and Media Access Control (MAC).
7 Physical N/A Bits
Performing encoding of bits stream to signals and Binary transmission. Dealing with cable specifications, layout of pins, voltages, modulation etc.
Note:
o Assignment should be in your own wordings not exactly copied from Internet, handouts or books.
o Your answer should be “to the point”.
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