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1、HowInternetworks…byZbigniewGargaszÓ20111ImportantintroductionWhenIgavethistexttoreadtomyfriendsandeditortheycamebacktomeaskingwhatisaboutandwhoamItargeting.Asfarpublishersdidn’tquiteliketheconceptI’vedecidedtopublishitasfreetextasrareasitwas.AsEnglishisnotmyfirstlanguagepleaseforgivem
2、eallthemistakesanderrors.Thistextisdedicatedtoeveryone,wellsomehighlyskilledITorInternetprofessionalswouldfindthattherearenonewfactsinthere,buttheyarepresentedfromdifferentangle.Don’tbeconfusedwhenyoustartreadingfirstchapterandyouwillfindthatit“smells”likesomeordinarynovelratherthensciencebook
3、.Wellthatwasn’tmyintentionstowritesciencebook,rathersomethingaccessibletoeveryone.Pleaserefertocharacterspresentedinthattextmetaphorically.Letmeexplain.Myideawastopresentsimplestoryfromeverydaylife.Somethingeveryonecaneasilyunderstandandreferto.Sothereitis-apostmanandstoryofdeliveringapackage.
4、Thisstoryinfirstchapterissymbolic,andastextgoesitwilluncovermoreandmoreinsideprocesseshowInternetworks.Sobymemorizingsimpleonestoryofpackagebeingdeliveredbyapostman,youcaneasilyrefertoeverysinglepartorInternettechnologyandrememberhowitworks.Soitisinmyopinionbestnotexactlytechnicalwaytohavesome
5、knowledgeaboutsomethingeveryoneisusingtoday.YoumightfindsomechapterswhereIprobablywastootechnical,orwhere“windbroughtmetofar”likeinlastchapter.Asoneofmymentorssays:“leaveyoursophisticationbehindyou”,wellthereiswordoftrueinthat,butIwouldn’tsayIamthatmuch“sophisticated”,andthistextisrathersometh
6、ing“likeIseeit”.MysuccesswouldbeiftheconceptwouldworkandyouwillreferinyourmindtothatfirstchapterwhenwordInternetwillcometosurface.Thanksforreading.TableofcontentsONE
7、Storyofaextraordinarypostman4TWO
8、Internetcableundermicroscope7THREE
9、Understandingcomputerlanguage8FOUR
10、HiddenlayersofInternet9FI
11、VE
12、Routing-findingtheroad13SIX
13、Internetpostaladdress17SEVEN
14、Howcomputerisfindingtherightaddressandroad17EIGHTS
15、Knockingonthedoors-serverandclient18NINE
16、DNScomputer-human‘TowerofBabel’language19TEN
17、HistoryofInternetdevelopment24ELEVEN
18、In
