Activity25 Soln - SOLUTION In-Class Activity #25 unchecked...

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ECSE-2660 Computer Architecture, Networks, & Operating Systems, Spring 2001 Page 1 of 2 SOLUTION In-Class Activity #25 unchecked 4/25/2001 9:51 A Activity 25.1 OSI Reference Model 1. (30) Link the functions listed on the right with the appropriate layer of the OSI Reference model on the left. Insert each letter into the appropriate row in the right-hand column. Layer Function Network Applications D G J Presentation Session Transport F (A) Network I Data Link A C E H Physical B A. Error detection/correction (end-to-end error detection/correction in transport layer) B. Frequency domain multiplexing C. Adding beginning/end bits streams to a packet (framing) D. Email E. Collision detection (MAC: Media Access Control ) F. Dividing messages into packets and reassembling them (packetization ) G. File transfer (ftp) H. Carrier sense (MAC) I. Figuring out the optimal path over a network (routing) J. Web browser Grading:3 points for each correct answer. 2. (20) What is the essential difference between the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP). Give an example of an application that is best suited to each protocol. TCP provides a reliable bit-stream channel. UDP is unreliable, but useable for audio and video. (P&D, p. 39) Grading: 10 points each for linking TCP with error-free messages and UDP with streaming data, 4 points for trying. Activity 25.2
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This note was uploaded on 04/25/2010 for the course ECSE ecse-2340 taught by Professor Wozny during the Spring '09 term at Rensselaer Polytechnic Institute.

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Activity25 Soln - SOLUTION In-Class Activity #25 unchecked...

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