Consider an ARQ protocol that uses only negative acknowledgments (NAKS), but no positive acknowledgments (ACKS). Describe what timeouts would have to be scheduled. Explain why an ACK-based protocol is usually preferred to a NAK-based protocol.

Consider an ARQ protocol that uses only negative acknowledgments (NAKS), but no positive acknowledgments (ACKS). Describe what timeouts would have to be scheduled. Explain why an ACK-based protocol is usually preferred to a NAK-based protocol.

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter9: Computer Networks

Section: Chapter Questions

Problem 10VE

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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

- Consider an ARQ protocol that uses only negative
acknowledgments (NAKS), but no positive acknowledgments
(ACKS). Describe what timeouts would have to be scheduled.
Explain why an ACK-based protocol is usually preferred to a
NAK-based protocol.

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