Describe the working of recursive and iterative queries in DNS. Use figures for the description. A file of F = 3 x 105 bits is distributed to N peers. The server has an upload rate of us = 1 x 105 bps. Each peer has a download rate of di = 1 x 105 bps and an upload rate of u = 30,000 bps. For N = 1 to 10, and for both client-server and P2P architectures, plot a single graph with minimum distribution time on the y-axis and N on the x-axis. Use a table to show all the values for N = 1 to 10 and use the values to plot the graph. Clearly show the calculation only for N = 1, 2, and 3. Explain at least one P2P application (BitTorrent or DHT) in detail.

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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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Describe the working of recursive and iterative queries in DNS. Use figures for the description.
A file of F = 3 x 10⁵ bits is distributed to N peers. The server has an upload rate of u_s = 1 x 10⁵ bps. Each peer has a download rate of d_i = 1 x 10⁵bps and an upload rate of u = 30,000 bps. For N = 1 to 10, and for both client-server and P2P architectures, plot a single graph with minimum distribution time on the y-axis and N on the x-axis. Use a table to show all the values for N = 1 to 10 and use the values to plot the graph. Clearly show the calculation only for N = 1, 2, and 3.
Explain at least one P2P application (BitTorrent or DHT) in detail.

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