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1、L7 Ehernt and P1ptuing a analyin EthertfrmeTPSFirt, ake sureyour browserscacei empty.(Todothi uner Netscape .0， sect it-Peeences-dvancd-Cace nd cer thememrynd discach.ForntertExplorer,seectTos-InternetOptions-eleteFi. Fo Frfo selct olsClearPrvatDat. Sartupth iresark pacet nie Enterthe folowing UR in
2、tyor browsr Sop iesark ackt cr.Fi, id thpket umbers (t lefmot column in teupe Wireshakwidow）ofh TTPGET messag that ws sent rm yoroter to aia.c.uas.du, as wll as hbeginnigo th TT response message sent t your copter gia.cs.assed.Yu shold see a cren hatloks sometng liks （wheecet in tecren hotbelow ntai
3、n te HT GET mesge)Sinceis ab abo Ethernet ad ARP，weent intereste in Ir higelar rocols et cheWireshark“listng of captu pakts” widow so that sws inomation onyabout oools belwIP. Tohave iresark do thi,selet Anayze-Enaled roocols.Then uncheck h IP ox nd select OK. QUETION1. Wha is t8-bit Ernetddrss fyou
4、r computer? he 4biEernet addesofour computer is 3c : 97 ： 0： :9:022. Wht is the -bit estination ddes in theEthrnet fram? I thisthEhrnet addrss of gaa.sumased? (Hnt: theanser i no). ha device has ts asis Ethernet ddress？ Ne:this s animorant qestion, andonetht studets sometimesget wrong Re-red ages 68
5、-469i the exandma sure yu nestndh answ here. h 48-bi destinatio address in h Ethernet fame is 38：2：d6:6：0e:0d. Tiisnt theternet adrss of gai.cs.ums.edu.It is the Eernet addresso y falt gte. That it , it the adr ofrter, hih is te linused t ge f the snet.3. Gi the heacimal vluforhe wo-bteFrae efied. W
6、t do thbt(s） hse lueis 1 mean witi he fag field？ Th heacimal vauefr th two-y Frmetpe fiel x00 Te it(s) wosevl s 1 itin the lagid mean te rgment has noten fmented 4. ow any byts ro he ery start o the Ethernet frame dostheASCII “G” n “E” pr int thent frme? 5 ytes Te ae 4 tesf Eerne freheader， 2 bytes
7、f IP header20 bs ofTCP header efreHP dta Sothe answeris54 yes.5. Whtisthe hxadeciml value f he RCfeld in tis Ehernet fram?Thr i no CRC fe.Becue the CRC allabeoe hieshak ake snifer start up.6. What i the vl theEhre ue addrss? Ihthe ddres f yor comutr, r ofgaiacsuas.edu(Hit： theansr is no). hatdevc ht
8、h as its Etheretaddres？ The valeof theEthetsoure adess is38:22:6:6:0e:0d. Ts i neithr the addes of mycomptr， nrfgai.cs.mssdu. It is the Ethernet addrsfdeault gteay. Tat is toy, its th addresof my router,hichite in used o et off the subnet.7. hat edestainaddrssin th Etefam? Isthis the entddess o yor
9、cmuter？ The stintin ddres inheEthernetrameis 3c :9 :0e : f: 6: . Thisis the Ethr ads m cmputer.8. Gie the hexadeial vaue fr th -yte Fam type field. t the t（) hoevalue s1 men within the fagfield? The hxacia vlu fothe tw-byt Frae typ feli 0x0800.The bi(s) woevalu is 1 ithin he flag fedmean thfgmen has
10、 no ee fagmented.9. Hw many bytes fromthe vr a fhe Etheneframe does the AII“O” n “OK” (i.e，the TP response cod) ppear theEternet fram? Teeae14 bytsof Ethrnt fraheader，20 bes f header and20 btes ofTCP eader befoeHTTPda. Sot TTP dta pears 54yts e ey strofthEthernet rame. ut beore theSCII “O” ppear,te
11、ar 3 byts o beoe heASC“O” appears, thr are7byts10. Wat the hexaemallue o he CRC fiel is Ethretfrme? There isn CRC fild. Beause teC clculate befrethe ishark cketniffe stat u.2. ThAdres eolutio Protool11. Write wthe conet of yo coptersRP cache.What i hemeaningf each oluval？ he ddress of Intnet clumn o
12、naithe IPadres The pyscal ddess olumncontain teMC addes. Te pecoumntelsus thinformationbouttye: namior statc.TEP ler you RP ce, asescibdve. Next, ake suryu browsers cache is et. (To do this nder Nece 7.0,sletEditrerncs-Avaced-Che ndclear the mory nddisk cace.For erne plor, sle ols-ntern pions-Delete Files.)
