Lab Assignment 02Word格式文档下载.docx

Lab Assignment 02Word格式文档下载.docx

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Topic:

CommandPrompt（CMD）Networking

[A]Aim:

Togetusetotheuseofsomecommoncommandsforcomputernetworkingusingcommandprompt（cmd）.

[B]Objectives:

1.Use“ipconfig”command;

2.graspthemeaningof“ping”command;

3.Understandmeaningofthe“Netstat”commandandapplication;

4.Understandmeaningofthe“tracert”commandandapplication;

5.Understandmeaningofthe“nslookup”commandandapplication;

6.Understandmeaningofthe“ARP”commandandapplication;

7.Understandmeaningandapplicationof“Telnet”.

[C]Materials:

1.APCconnectedtoLANnetworkwithinternet.

2.commandprompt（cmd）

[D]Procedure/Method:

A.Theuseof“ipconfig/all”command

Note:

ipconfigcommandisthecommandweoftenuse,itcancheckthesituationofthenetworkconnection,suchasthemachine'

sIPaddress,subnetmask,DNSconfiguration,theDHCPconfigurationetc/allparametersisshowingallconfigurationparameters.

Todothispracticefollowingstepsshouldbedone:

1）Inthe"

start"

-"

run"

pop-updialogboxtype"

CMD"

pressenter,thepop-upwindow,thentypein"

ipconfig/all"

enter,asshowninfigure.

2）ThepictureaboveshowsthecorrespondingaddresssuchasIPaddress,subnetmask,andsoon.Asshowninfigure:

3）Ifthehost（computer）isnotconnectedtotheinternet:

a.Pingtheipaddressofthecomputer

b.Displaywillshowthatitcan'

tsurftheInternet.Thedatagram:

send=4acceptlost=0=4

B.Theuseof“ping”command

1）Input“ping”

2）InputpingIPaddress–t,asshowninfigure:

AppearabovethesecanshownormalaccesstotheInternet,toexplaintheTTL

TTL:

survivaltimespecifiedthedatagramisallowedbythenumberofsegmentsbeforerouterismissing.

TTLissetbythesendinghost,inordertopreventthepacketsintheIPInternetconstantlycyclewillneverend.ForwardingIPpackets,requireatleasttheTTLroutersreduce1.

speedisequaltothematerialofthenumberofbytes（send/returntime[ms]）Kbytes.

ifyourmachineTTLis251,thatmeansyourmachine'

sregistrywaschanged!

Asshowninfigure:

Packets:

send=100receive=100;

3）Theuseofping-n

Forexample:

ping192.168.28.101-n3totheIPpingthreetimesbeforeterminationofoperations,nnumberofrepresentative;

4）Theuseofping-l,asshown:

TotheIPuserstosend2000bytes;

Ifyouwanttogrowcanpress"

CTRL+c"

buildterminationofoperation;

5）Ping-l-acombinationofusing,asshown.

SendtheIPusercontinuous2000bytes

C.Theuseof“netstat”command

Annotation:

”netstat”isDOScommands,monitorTCP/IPnetworkisaveryusefultool,itcandisplaytheroutingtable,theactualnetworkconnectionandthestatusinformationofeachnetworkinterfaceequipment.“netstat”displaysandIP,TCP,UDP,andICMPprotocolrelatedstatisticaldata,commonlyusedtotestthemachinenetworkconnectionconditionofeachport.

1）Input“netstat”

2）Input“netstat-a”

3）Input“netstat-e”

4）Input“netstat-n”

D.Theuseof“tracert”command

“tracert”（tracerouting）istheroutingtrackingutility,usedtodeterminetheIPdatagramaccess.“tracert”commandtousetheIPtimetolive（TTL）fieldandICMPerrormessages

Determinefromonehosttootherhostsonthenetworkrouting.

1）Input“tracert”

E.Theuseof“nslookup”command

“nslookup”isconnecttotheDNSserverintheNT,2000,querythedomainnameinformationisaveryusefulcommandbythelocalDNScachereadoutdirectly,ratherthanthelocalDNSaskreallyresponsibleforthedomainnameserver.“nslookup”mustbeinstalledtheTCP/IPnetworkenvironment.“nslookup”mustbeinstalledtheTCP/IPnetworkenvironment.

1）Input“nslookup”

TheaboveresultsshowthattheworkingoftheDNSserverhost,,itistheIPaddressofthe202.102.128.68

2）ToreverseDNS123.235.44.38addressaswww.Basshown:

3）Ifoneofthese,thetesthostinthenetwork,didn'

tfindtheDNSserverthatcanbeused“nslookup”

***Can'

tfindservernamefordomain:

Noresponsefromserver

trepair:

Non-existentdomain

4）Ifoneofthese,thisshowsthattheDNSserverinthenetworkns-atwork,butcan'

trealizethedomainnameresolvedproperly.

Server:

ns-

Address:

202.96.209.5

***ns-can'

tfindaNon-existentdomain

F.Theuseof“arp”command

theARPProtocolistheabbreviationof"

AddressResolutionProtocol"

.Theactualtransmissioninlocalareanetwork（LAN）,anetworkisa"

frame"

frameinsideisatargethostMACaddress.

1）Input“arp”

Arpworkingprinciple:

10.1.1.1host10.1.1.2tocommunication,firstofalltofinditsownARPcache,ifwithout10.1.1.2slow

Saverecordissentthefollowingradiopackage:

"

I'

mthehostIamhosting10.1.1.1,myMACis00-58-4c-00-03-B0,IPforhost10.1.1.2pleasetellyourMAC"

Ipforhost10.1.1.2responsethisradio,replyARPbroadcastasfollows:

Iam10.1.1.2,myMACis0e-59-4c-00-33-B0"

So,thehost10.1.1.1ARPcacherefreshyourself,andthenissuetheIPpacket.

G.Theuseof“Telnet”command

Telnetistransmissioncontrolprotocol/Internetprotocol（TCP/IP）network（suchastheInternet）loginandsimulationprogram.ItwasoriginallydevelopedbyARPANET,butnowitismainlyusedintheInternetfield.

Itsbasicfunctionisthatallowstheusertologintotheremotehostsystem.Atfirst,itjustmakestheuserofthiscomputerconnectedtotheremotecomputer,andthusbecomeaterminaltotheremotehost.Someofitsnewerversionperformingmoreprocessinginlocal,socanprovidebetterresponse,andreducethelinksenttothefarhosttheamountofinformation.

1）Forexample,ifyouareinschoolyouareathometotheremotemachinecanbesethereonthedorightclick"

mycomputer"

choose"

management"

asshowninfigure:

Right-clickontheAdminsitrator--select--"

setpassword"

popsup

Dialogbox,continuetosingleuserpasswordsothatyoucan.

2）RemoteComputer

Click"

"

program"

accessories"

--"

remotedesktopconnection"

.Thepop-updialog.Asshowninfigure:

InthecomputerinputtheIPaddressoftheremotecomputeryouwant.Clickthe"

link"

button

Input"

username"

and"

password"

clickok.Asshowninfigure:

Theyoucanseethedesktopofremotecomputerconnectedto.

[E]Results:

Addscreenshotsforeverymethodfortheobjectivesandlabelthescreenshotsaccordingly.

[F]Conclusion:

Writeindividualconclusiononwhatdoyoulearninthislabsession.