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4. (8 pts) A communication link has a bit rate of 1 Gbps and a length of 40 km. Propagation velocity is 2.5 × 108 m/s. Information frames are 9200 bytes long. The frame header is 100 bytes. One 100-byte ACK frame is sent for every received information frame. (a) What is the minimum window size that maximizes the effective bit rate? (b) What is the information effective bit rate if the window size is 3 frames? (c) What is the information effective bit rate if the window size is 100 frames?

4. (8 pts) A communication link has a bit rate of 1 Gbps and a length of 40 km. Propagation velocity is 2.5 × 108 m/s. Information frames are 9200 bytes long. The frame header is 100 bytes. One 100-byte ACK frame is sent for every received information frame. (a) What is the minimum window size that maximizes the effective bit rate? (b) What is the information effective bit rate if the window size is 3 frames? (c) What is the information effective bit rate if the window size is 100 frames?

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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4. (8 pts) A communication link has a bit rate of 1 Gbps and a length of 40 km. Propagation velocity is 2.5 × 108 m/s. Information frames are 9200 bytes long. The frame header is 100 bytes. One 100-byte ACK frame is sent for every received information frame. (a) What is the minimum window size that maximizes the effective bit rate? (b) What is the information effective bit rate if the window size is 3 frames? (c) What is the information effective bit rate if the window size is 100 frames?
Transcribed Image Text:4. (8 pts) A communication link has a bit rate of 1 Gbps and a length of 40 km. Propagation velocity is 2.5 × 108 m/s. Information frames are 9200 bytes long. The frame header is 100 bytes. One 100-byte ACK frame is sent for every received information frame. (a) What is the minimum window size that maximizes the effective bit rate? (b) What is the information effective bit rate if the window size is 3 frames? (c) What is the information effective bit rate if the window size is 100 frames?
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