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Which of the following statements are true about MAC protocols? A. Medium Access Control protocols determine the sequence in which end hosts get to send packets over a shared medium, such as a radio channel or shared cable. B. ALOHA is a simple, deterministic access protocol in which each end host with data to send transmits in strict round robin order. C. In an ALOHA network, the end hosts can spend a large fraction of their time sending packets that will collide with others.

Which of the following statements are true about MAC protocols? A. Medium Access Control protocols determine the sequence in which end hosts get to send packets over a shared medium, such as a radio channel or shared cable. B. ALOHA is a simple, deterministic access protocol in which each end host with data to send transmits in strict round robin order. C. In an ALOHA network, the end hosts can spend a large fraction of their time sending packets that will collide with others.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Which of the following statements are true about MAC protocols? A. Medium Access Control protocols determine the sequence in which end hosts get to send packets over a shared medium, such as a radio channel or shared cable. B. ALOHA is a simple, deterministic access protocol in which each end host with data to send transmits in strict round robin order. C. In an ALOHA network, the end hosts can spend a large fraction of their time sending packets that will collide with others. D. Random access protocols are generally more complicated and less reliable than deterministic access protocols. You are considering two retransmission strategies for all hosts in a network using the ALOHA protocol. The first is a deterministic strategy where the first time a collision is detected, the sender waits one second and retransmits. The second time a collision is detected, the sender waits two seconds and retransmits, and so on. The second strategy is a random strategy where when a collision is detected, the sender waits a random amount of time and retransmits. After the first collision it randomly chooses between waiting 0 or 1 seconds; after the second collision it randomly waits between 0 and 2 seconds, and so on. A. The deterministic strategy will perform better under low-load B. The random strategy will perform better under high- load C. The deterministic strategy will not recover from collisions D. The average expected delay for these strategies is the same
Transcribed Image Text:Which of the following statements are true about MAC protocols? A. Medium Access Control protocols determine the sequence in which end hosts get to send packets over a shared medium, such as a radio channel or shared cable. B. ALOHA is a simple, deterministic access protocol in which each end host with data to send transmits in strict round robin order. C. In an ALOHA network, the end hosts can spend a large fraction of their time sending packets that will collide with others. D. Random access protocols are generally more complicated and less reliable than deterministic access protocols. You are considering two retransmission strategies for all hosts in a network using the ALOHA protocol. The first is a deterministic strategy where the first time a collision is detected, the sender waits one second and retransmits. The second time a collision is detected, the sender waits two seconds and retransmits, and so on. The second strategy is a random strategy where when a collision is detected, the sender waits a random amount of time and retransmits. After the first collision it randomly chooses between waiting 0 or 1 seconds; after the second collision it randomly waits between 0 and 2 seconds, and so on. A. The deterministic strategy will perform better under low-load B. The random strategy will perform better under high- load C. The deterministic strategy will not recover from collisions D. The average expected delay for these strategies is the same
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