not cached in your local host, so a DNS lookup is necessary to obtain the IP address. Suppose that n DNS servers are visited before your host receives the IP address from DNS; the successive visits incur an RTT of RTT1, ..., RTTN. Further suppose that the Web page associated with the link contains exactly one object, consisting of a small amount of

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
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Suppose within your Web browser you click on a link to obtain a Web page. The IP address for the associated
URL is
not cached in your local host, so a DNS lookup is necessary to obtain the IP address. Suppose that n DNS
servers are
visited before your host receives the IP address from DNS; the successive visits incur an RTT of RTT1, ..., RTTn.
Further suppose that the Web page associated with the link contains exactly one object, consisting of a small
amount of
HTML text. Let RTTO denote the RTT between the local host and the server containing the object. Assuming
zero
transmission time of the object, how much time elapses from when the client clicks on the link until the client
receives
the object?
Transcribed Image Text:Suppose within your Web browser you click on a link to obtain a Web page. The IP address for the associated URL is not cached in your local host, so a DNS lookup is necessary to obtain the IP address. Suppose that n DNS servers are visited before your host receives the IP address from DNS; the successive visits incur an RTT of RTT1, ..., RTTn. Further suppose that the Web page associated with the link contains exactly one object, consisting of a small amount of HTML text. Let RTTO denote the RTT between the local host and the server containing the object. Assuming zero transmission time of the object, how much time elapses from when the client clicks on the link until the client receives the object?
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