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Look at the following figure, and answer questions. A) At the time point marked by "1", the sender (will / will not) sends a packet(s). The sender (will / will not) slides the sender window. Provide your choice of will/won't in the above 2 blanks. If you chose "the sender will send packets", what is/are the packet(s) being sent? If you chose "will not", why not? B) At the time point marked by "2", the sender (will /will not) sends a packet(s). The sender (will / will not) slides the sender window. Provide your choice of will/won't in the above 2 blanks. If you chose "the sender will send packets", what is/are the packet(s) being sent? If you chose "will not", why not? C) At the time point marked by "3", the sender (will / will not) sends a packet(s). The sender (will / will not) slides the sender window. Provide your choice of will/won't in the above 2 blanks. If you chose "the sender will send packets", what is/are the packet(s) being sent? If you chose "will not", why not? Go-Back-N in action sender receiver 012345678 012345678 012345678 012345678 send pkt0 send pkt1 send pkt2 send pkt3 (wait) receive pkt0, send acko receive plt1, send ack1 receive pkt3, discard, (re)send ackl rcv ack0, send pkt45 12345678 2345678 rcv ack1, send pkt5 receive pkt4, discard, (re)send ackl receive pkt5, discard, (re)send ackl pit 2 timeout -X TOET

Look at the following figure, and answer questions. A) At the time point marked by "1", the sender (will / will not) sends a packet(s). The sender (will / will not) slides the sender window. Provide your choice of will/won't in the above 2 blanks. If you chose "the sender will send packets", what is/are the packet(s) being sent? If you chose "will not", why not? B) At the time point marked by "2", the sender (will /will not) sends a packet(s). The sender (will / will not) slides the sender window. Provide your choice of will/won't in the above 2 blanks. If you chose "the sender will send packets", what is/are the packet(s) being sent? If you chose "will not", why not? C) At the time point marked by "3", the sender (will / will not) sends a packet(s). The sender (will / will not) slides the sender window. Provide your choice of will/won't in the above 2 blanks. If you chose "the sender will send packets", what is/are the packet(s) being sent? If you chose "will not", why not? Go-Back-N in action sender receiver 012345678 012345678 012345678 012345678 send pkt0 send pkt1 send pkt2 send pkt3 (wait) receive pkt0, send acko receive plt1, send ack1 receive pkt3, discard, (re)send ackl rcv ack0, send pkt45 12345678 2345678 rcv ack1, send pkt5 receive pkt4, discard, (re)send ackl receive pkt5, discard, (re)send ackl pit 2 timeout -X TOET

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
Problem 1PE
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**Go-Back-N in Action: Detailed Explanation and Questions** ### Overview The Go-Back-N ARQ (Automatic Repeat Request) protocol is a sliding window protocol that ensures reliable data transmission between sender and receiver. The following figure illustrates the basic operations and interactions of Go-Back-N in action. ### Image Description The image includes a numbered sequence of events between a sender and a receiver. It also has a graphical representation of how packets are transmitted and acknowledgments (ACKs) are received. ### Detailed Diagram Explanation The diagram features: - The sender's window: Indicating the range of packets the sender is allowed to send before needing an acknowledgment. - The sender's actions: The process of sending packets and waiting for ACKs. - The receiver's actions: The process of receiving packets, sending ACKs, and sometimes discarding packets due to transmission errors or other issues. **Sender Side:** - Sequence of packets (pkt0, pkt1, pkt2, etc.) being sent from the sender side. - Retransmissions occur if ACKs are not received in time (e.g., pkt2 timeout resulting in retransmission of pkt2). **Receiver Side:** - ACKs are sent for each correctly received packet (e.g., ACK0 for pkt0). - Packets received out-of-order or having errors are discarded (e.g., pkt4 discard). ### Questions for Analysis A) At the time point marked by “1”, the sender (will / will not) sends a packet(s). The sender (will / will not) slides the sender window. Provide your choice of will/won’t in the above 2 blanks. If you chose “the sender will send packets”, what is/are the packet(s) being sent? If you chose “will not”, why not? B) At the time point marked by “2”, the sender (will / will not) sends a packet(s). The sender (will / will not) slides the sender window. Provide your choice of will/won’t in the above 2 blanks. If you chose “the sender will send packets”, what is/are the packet(s) being sent? If you chose “will not”, why not? C) At the time point marked by “3”, the sender (will / will not) sends a packet(s). The sender (will / will not) slides the sender window. Provide your choice of will/won’t in the above
Transcribed Image Text:**Go-Back-N in Action: Detailed Explanation and Questions** ### Overview The Go-Back-N ARQ (Automatic Repeat Request) protocol is a sliding window protocol that ensures reliable data transmission between sender and receiver. The following figure illustrates the basic operations and interactions of Go-Back-N in action. ### Image Description The image includes a numbered sequence of events between a sender and a receiver. It also has a graphical representation of how packets are transmitted and acknowledgments (ACKs) are received. ### Detailed Diagram Explanation The diagram features: - The sender's window: Indicating the range of packets the sender is allowed to send before needing an acknowledgment. - The sender's actions: The process of sending packets and waiting for ACKs. - The receiver's actions: The process of receiving packets, sending ACKs, and sometimes discarding packets due to transmission errors or other issues. **Sender Side:** - Sequence of packets (pkt0, pkt1, pkt2, etc.) being sent from the sender side. - Retransmissions occur if ACKs are not received in time (e.g., pkt2 timeout resulting in retransmission of pkt2). **Receiver Side:** - ACKs are sent for each correctly received packet (e.g., ACK0 for pkt0). - Packets received out-of-order or having errors are discarded (e.g., pkt4 discard). ### Questions for Analysis A) At the time point marked by “1”, the sender (will / will not) sends a packet(s). The sender (will / will not) slides the sender window. Provide your choice of will/won’t in the above 2 blanks. If you chose “the sender will send packets”, what is/are the packet(s) being sent? If you chose “will not”, why not? B) At the time point marked by “2”, the sender (will / will not) sends a packet(s). The sender (will / will not) slides the sender window. Provide your choice of will/won’t in the above 2 blanks. If you chose “the sender will send packets”, what is/are the packet(s) being sent? If you chose “will not”, why not? C) At the time point marked by “3”, the sender (will / will not) sends a packet(s). The sender (will / will not) slides the sender window. Provide your choice of will/won’t in the above
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