Suppose that a SW ARQ system with 1-bit sequence numbering has a time-out value that is less than the time required to receive an ACK. Station A sends 5 frames to station B. No errors occur during transmission of all 5 frames. One ACK is lost when it is transmitted the first time (see the following table), and no error occurs in re- transmission of that ACK. No errors occur during transmission of the other 4 ACKS. Sketch the sequence of frame exchanges that transpire between stations A and B. Last digit of your student ID number 0, 1 2, 3 4, 5 6, 7 8, 9 Lost ACK 2 3 4

Suppose that a SW ARQ system with 1-bit sequence numbering has a time-out value that is less than the time required to receive an ACK. Station A sends 5 frames to station B. No errors occur during transmission of all 5 frames. One ACK is lost when it is transmitted the first time (see the following table), and no error occurs in re- transmission of that ACK. No errors occur during transmission of the other 4 ACKS. Sketch the sequence of frame exchanges that transpire between stations A and B. Last digit of your student ID number 0, 1 2, 3 4, 5 6, 7 8, 9 Lost ACK 2 3 4

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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Concept explainers

Types Of Protocols

A network protocol is a collection of rules that governs the exchange of data between devices connected to the same network. In other words, network protocols are rules that specify how devices communicate or transfer data over a network. The sender and receiver systems must obey the standards to facilitate communication between them.

Question

Suppose that a SW ARQ system with 1-bit sequence numbering has a time-out value
that is less than the time required to receive an ACK. Station A sends 5 frames to station
B. No errors occur during transmission of all 5 frames. One ACK is lost when it is
transmitted the first time (see the following table), and no
transmission of that ACK. No errors occur during transmission of the other 4 ACKS.
Sketch the sequence of frame exchanges that transpire between stations A and B.
(а)
error occurs in re-
Last digit of your student ID number
0, 1
2, 3
Lost ACK
1
4, 5
6, 7
8, 9
2
3
4

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