Architecture

Wireshark Lab: IP Version: 2.0 © 2007 J.F. Kurose, K.W. Ross. All Rights Reserved reck bingler Ne dickensrking: A Topth lot Approach, 4 edition. In this lab, well fashion into the IP protocol, focusing on the IP datagram. Well do so by analyzing a confidential information of IP datagrams displace and receive by an execution of the tracer surfacee course of study (the traceroute programme itself is explored in more detail in the Wireshark ICMP lab). Well investigate the diametrical fields in the IP datagram, and study IP atomisation in detail. Before beginning this lab, youll credibly extremity to revaluation sections 1.4.3 in the text and section 3.4 of RFC 2151 [ftp://ftp.rfc-editor.org/in-notes/rfc2151.txt] to update yourself on the carrying out of the traceroute program. Youll also want to read Section 4.4 in the text, and probably also have RFC 791 [ftp://ftp.rfc-editor.org/in-notes/rfc791.txt] on hand as well, for a discussion of the IP protocol.1 1. Capturing packets from an execution of traceroute In auberge to generate a trace of IP datagrams for this lab, well use the traceroute program to send datagrams of different sizes towards some depot, X.

Recall that traceroute operates by set-back sending iodine or more datagrams with the time-to-live (TTL) field in the IP nous set to 1; it then sends a series of one or more datagrams towards the same finishing with a TTL jimmy of 2; it then sends a series of datagrams towards the same destination with a TTL value of 3; and so on. Recall that a router must decrement the TTL in to each one received datagram by 1 (actu ally, RFC 791 says that the router must decr! ement the TTL by at least one). If the TTL reaches 0, the router returns an ICMP message (type 11 TTL-exceeded) to the sending legion. As a result of this behavior, a datagram with a TTL of 1 ( direct by the host executing traceroute) will cause the router one record hop forth from the sender to send an ICMP TTL-exceeded message back to the sender; the datagram sent with a TTL of 2 will cause the router two hops away...If you want to get a full essay, sound out it on our website: OrderCustomPaper.com

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