a. Which information are used by TCP during demultiplexing at the receiver. b. Suppose Host A sends two TCP segments back-to-back to Host B over a TCP connection. The first segment has sequence number 70; the second has sequence number 130. How much data in terms of bytes is in the first segment? Suppose that the first segment is lost but the second segment arrives at B. In the acknowledgment that Host B sends to Host A, what will be the acknowledgment number? c. Suppose that TCP's current estimated values for the round trip time (estimatedRTT) and deviation in the RTT (DevRTT) are 250 msec and 14 msec, respectively. Suppose that the next two measured values of the RTT are 270 msec and 240 msec. Compute the values of the TCP TimeoutInterval after each of these two measured RTT values are obtained. Use the values of a = 0.125, and ß = 0.25.

a. Which information are used by TCP during demultiplexing at the receiver. b. Suppose Host A sends two TCP segments back-to-back to Host B over a TCP connection. The first segment has sequence number 70; the second has sequence number 130. How much data in terms of bytes is in the first segment? Suppose that the first segment is lost but the second segment arrives at B. In the acknowledgment that Host B sends to Host A, what will be the acknowledgment number? c. Suppose that TCP's current estimated values for the round trip time (estimatedRTT) and deviation in the RTT (DevRTT) are 250 msec and 14 msec, respectively. Suppose that the next two measured values of the RTT are 270 msec and 240 msec. Compute the values of the TCP TimeoutInterval after each of these two measured RTT values are obtained. Use the values of a = 0.125, and ß = 0.25.

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

a. Which information are used by TCP during demultiplexing at the receiver.
b. Suppose Host A sends two TCP segments back-to-back to Host B over a TCP
connection. The first segment has sequence number 70; the second has
sequence number 130. How much data in terms of bytes is in the first segment?
Suppose that the first segment is lost but the second segment arrives at B. In the
acknowledgment that Host B sends to Host A, what will be the acknowledgment
number?
c. Suppose that TCP's current estimated values for the round trip time
(estimatedRTT) and deviation in the RTT (DevRTT) are 250 msec and 14 msec,
respectively. Suppose that the next two measured values of the RTT are 270
msec and 240 msec. Compute the values of the TCP TimeoutInterval after each
of these two measured RTT values are obtained. Use the values of a = 0.125,
and ß = 0.25.
d. In congestion avoidance phase of TCP RENO and Tahoe, what happens to cwnd
if 3 duplicate ACKs are received?

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