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3.3.3.3 Packet Tracer - Explore a Network Instructions

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  Packet Tracer - Explore a Network TopologyObjectives Part 1: Examine Internetwork Traffic at ranc!Part : Examine Internetwork Traffic to #entralPart $: Examine Internet Traffic from ranc! ackgro%n& This simulation activity is intended to help you understand the flow of traffic and the contents of data packets as they traverse a complex network. Communications will be examined at three different locations simulating typical business and home networks.Take a few moments to study the topology displayed. The Central location has three routers and multiple networks possibly representing different buildings within a campus. The Branch location has only one router with a connection to both the Internet and a dedicated wide-area network (! # connection to the Central $ %&' Cisco and)or its affiliates. !ll rights reserved. This document is Cisco *ublic.*age 1  of '  Packet Tracer - Explore a Network location. The +ome ,ffice makes use of a cable modem broadband connection to provide access to both the Internet and to corporate resources over the Internet.The devices at each location use a combination of static and dynamic addressing. The devices are configuredwith default gateways and omain ame ystem ( # information/ as appropriate. Part 1:Examine Internetwork Traffic at ranc! In *art ' of this activity/ you will use imulation mode to generate web traffic and examine the +TT* protocol along with other protocols necessary for communications. (tep 1:(witc!ing from )ealtime to (im%lation mo&e* a.Click the (im%lation  mode icon to switch from )ealtime  mode to (im%lation  mode.b.0erify that +)P, N(, .TTP /   and T#P  are selected from the Event /ist 0ilters .c.1ove the slider located below the Play #ontrols  buttons ( ack / +%to #apt%re ) Play / #apt%re ) 0orwar& # all the way to the right. (tep :enerate traffic %sing a web browser* Currently the imulation *anel is empty. In the 2vent 3ist at the top of the imulation *anel there are six columns listed across the heading. !s traffic is generated and stepped through/ events display in the list. The Info  column is used to inspect the contents of a particular event. Note 4 The panel to the left of the imulation *anel displays the topology. 5se the scrollbars to bring the Branch location into the panel/ if necessary. The panels can be ad6usted in si7e by hovering next to the scrollbar and dragging left or right. a.Click the (ales P#  in the far left pane. b.Click the esktop tab and click the 2eb rowser   icon to open it.c.In the 583 field/ enter !ttp:33branc!server*pt*pta  and click o . 3ook in the 2vent 3ist in the imulation *anel. hat is the first type of event listed9The first type of the event listed is  d.Click the N( info box. In the O%t /ayers /   is listed for 3ayer :. 3ayer ; is using 5* to contact the   server on port < ( st Port: #. Both the source and destination I* addresses are listed. hat information is missing to communicate with the   server9The information missing to communicate with the   server is the layer %.e.Click +%to #apt%re3Play . In approximately ;< seconds/ a window displays/ indicating the completion of the current simulation. Click the 4iew Previo%s Events  button. croll back to the top of the list and note the number of +)P  events. 3ooking at the evice column in 2vent list/ how many of the devices in the Branch location does the +)P re=uest pass through9The !8* re=uest pass through '>; times branch locations.f.croll down the events in the list to the series of N(  events. elect the N(  event that has the ?!t evice@ listed as ranc!(erver  . Click the s=uare box in the Info  column. hat can be determined by selecting 3ayer : in the O(I 5o&el 9 (3ook at the results displayed directly below In /ayers* #There is noting to be determined.g.Click the O%tbo%n& P6 etails  tab. croll to the bottom of the window and locate the   !nswer section. hat is the address displayed9The address displayed is ':%.'>.&. $ %&' Cisco and)or its affiliates. !ll rights reserved. This document is Cisco *ublic.*age  of '  Packet Tracer - Explore a Network h.The next several events are T#P  events enabling a communications channel to be established. elect the last T#P  event at device (ales  6ust prior to the .TTP event. Click the colored s=uare Info box to display the *5 information. +ighlight 3ayer ; in the In /ayers  column. 3ooking at item > in the list directly below the In /ayers  column/ what is the connection state9The connection state is that it will connect to the next layers. i.The next several events are .TTP  events. elect any one of the .TTP events at an intermediary device (I* *hone or witch#. +ow many layers are active at one of these devices/ and why9There are ; layers active 3ayers '/ %/ / ;/ and : because internet connection can be accessible in phones.  6.elect the last .TTP event at the ales *C. elect the uppermost layer from the O(I 5o&el  tab. hat is the result listed below the In /ayers  column9 In layer 1  4 '. Aast2thernet& receives the frame. In layer :  '. The frames destination 1!C address matches the receiving ports 1!C address/ the broadcast address/ or a multicast address. In layer $:  '. The packets destination I* address matches the devices I* address or the broadcast address. The device de-encapsulates the packet. In layer 7  4 '. The device receives a TC* *5+!CD segment on the connection to ':%.'>.&. on port E&. In layer 8 4 '. The +TT* client receives a +TT* reply from the server. It displays the page in the web browser. Part :Examine Internetwork Traffic to #entral In *art % of this activity/ you will use *acket Tracer (*T# imulation mode to view and examine how traffic leaving the local network is handled. (tep 1:(et %p for traffic capt%re to t!e #entral web server* a.Close any open *5 Information windows.b.Click )eset (im%lation  (located near the middle of the imulation *anel#. c.Type !ttp:33centralserver*pt*pta  in the web browser of the ales *C.d.Click +%to #apt%re3Play F in approximately :< seconds/ a window displays/ indicating the completion of the current simulation. Click 4iew Previo%s Events . croll back to the top of the listF note that the first series of events are N(  and there are no +)P entries prior to contacting the ranc!(erver  . Based on what you have learned so far/ why is this the case9I have learned that   are not allowing access to the !8* to the Branch erver.e.Click the last   event in the Info  column. elect /ayer 8  in the O(I 5o&el  tab.By looking at the information provided/ what can be determined about the   results9 The   client sends a   =uery to the   server. f.Click the Inbo%n& P6 etails tab. croll down to the N( +N(2E)  section. hat is the address listedfor centralserver.pt.pta9The address listed for central server is TG*24 &x&&&' TT34 E>;&& C3!4 &x&&&' 32 HT+4 & $ %&' Cisco and)or its affiliates. !ll rights reserved. This document is Cisco *ublic.*age $  of '  Packet Tracer - Explore a Network g.The next several events are +)P  events. Click the colored s=uare Info box of the last +)P event. Click the Inbo%n& P6 etails  tab and note the 1!C address. Based on the information in the !8* section/ what device is providing the !8* reply9The device providing the !8* reply is for 1!Ch.The next several events are T#P events/ once again preparing to set up a communications channel. Aind the first .TTP  event in the 2vent 3ist. Click the colored s=uare box of the .TTP  event. +ighlight 3ayer % in the O(I 5o&el  tab. hat can be determined about the destination 1!C address9 The destination 1!C address is the one who will find its next destination.i.Click the .TTP event at device )7 . otice that 3ayer % contains an 2thernet II header. Click the .TTP  event at device Intranet . hat is the 3ayer % listed at this device9'. The next-hop I* address is a unicast. The !8* process looks it up in the !8* table.%. The next-hop I* address is in the !8* table. The !8* process sets the frames destination 1!C address to the one found in the table.. The device encapsulates the *5 into an 2thernet frame. otice that there are only two active layers/ as opposed to three active layers when moving through the router. This is a ! connection/ which will be discussed in a later course. Part $:Examine Internet Traffic from ranc! In *art  of this activity/ you will clear the events and start a new web re=uest that will make use of the Internet. (tep 1:(et %p for traffic capt%re to an Internet web server* a.Close any open *5 information windows.b.Click )eset (im%lation  near the middle of the imulation *anel. Type !ttp:33www*netaca&*pta  in the web browser of the ales *C.c.Click +%to #apt%re3Play F in approximately :< seconds/ a window displays/ indicating the completion of the current simulation. Click 4iew Previo%s Events . croll back to the top of the listF notice that the first series of events are N( . hat do you notice about the number of N(  events9The number of   events starts at the set of < or even during the process. d.,bserve some of the devices that the N( events travel through on the way to a   server. here are these devices located9These devices are located directly on the message. e.Click the last N( event. Click the Inbo%n& P6 etails  tab and scroll down to the last   !nswer section. hat is the address listed for www*netaca&*pta 9T*24 &x&&&'/ C3!4 &x&&&'/ TT34 E>;&&/ 32 HT4 &f.hen routers move the .TTP event through the network/ there are three layers active in both the In /ayers and O%t /ayers in the O(I 5o&el  tab. Based on that information/ how many routers are passed through9There are ; I* address. % rounters that passed through.g.Click the T#P  event 6ust prior to the last .TTP event. Based on the information displayed/ what is the purpose of this event9The purpose of this event is to send message to the I* address %'>.';>.;>.'' $ %&' Cisco and)or its affiliates. !ll rights reserved. This document is Cisco *ublic.*age 7  of '
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