Architecture

Wireshark Lab: IP Version: 2.0 © 2007 J.F. Kurose, K.W. Ross. All Rights Reserved computing device Ne dickensrking: A Topth lot Approach, 4 edition. In this lab, well hear into the IP protocol, focusing on the IP datagram. Well do so by analyzing a confidential information of IP datagrams move and receive by an execution of the tracer come one course of study (the traceroute course itself is explored in more detail in the Wireshark ICMP lab). Well investigate the diverse fields in the IP datagram, and study IP fragmentation in detail. Before beginning this lab, youll probably extremity to go over 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 physical process 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. Captur ing 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 ace or more datagrams with the time-to-live (TTL) field in the IP aim set to 1; it then sends a series of mavin or more datagrams towards the same name and address with a TTL comfort 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 (actually, RFC 791 says that the router must decrement the TTL by at least one). If the TTL reaches 0, the router returns an ICMP message (type 11 TTL-exceeded) to the sending multitude. As a result of this behavior, a datagram with a TTL of 1 (send by the host executing traceroute) will cause the router one hop external from the sender to send an ICMP TTL-exc eeded message back to the sender; the datagr! am 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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