Pambudziro 0 haisi nhamba chaiyo yekufambisa, asi kune chinangwa chayo
Kusiyana nenhamba dzenhamba dzepamusoro , chiteshi chetachiona chikamu chakachengeterwa muTCP / IP kusungirirana, zvinoreva kuti hazvifaniri kushandiswa muTCP kana UDP mharidzo.
Pambudziro 0 inonyanya kukosha mumagetsi ekugadzira mitambo , zvikurukuru purogiramu yeSex socket, yekukumbira system-allocated, ports ports. Port zero yakafanana nechiteshi chemasango chechikwata chinotaurira hurongwa kuti uwane nhamba yakakodzera yekufambisa.
Nzvimbo dzekutengesa muTCP uye UDP dzinotangira kubva munhamba zero kusvika 65535. Nhamba dzepamhanho dziri pakati pe zero uye 1023 dzinotsanangurwa sehurongwa hwemasipoti kana mazivi anozivikanwa. IInternet Yakapiwa Numeri Authority (IANA) inoshandisa runyorwa rwepamutemo rwekushandiswa kweizvi nhamba dzenhamba pa internet, uye gomba rekushandisa 0 harisi kushandiswa.
Mafambiro akaita sei 0 Works mu Network Programming
Kugadzira imwe nhamba yekutengesa zvidzitiro kunoda kuti imwe nhamba yepamusoro igoverwe pane zvose zviripo uye nzvimbo yekuenda. TCP kana UDP mharidzo yakatumirwa nemuvambi (chitubu) ine nhamba dzese dzenhamba kuitira kuti mumiririri wemashoko (kuenda kune) anogona kupa mhinduro dzemhinduro kune yakakodzera protocol endpoint.
IANA inotanga kugovera purogiramu yeports yevashandi vekushandiswa kwekombiyuta semashandisi ewebhu (port 80), asi maitiro akawanda eTCP neDPP haafaniri purogiramu yavo yekutengesa uye inofanira kuwana imwe kubva pane inoshandiswa yechirongwa chekoni nguva dzose pavanotanga kushanda.
Kuti ugove nhamba yechipfigiro chayo, mapurisa anoshevedza TCP / IP network mabasa sekusunga () kukumbira imwe. Basa racho rinokwanisa kupa nhamba yakagadzikana (yakaoma-coded) kuti isunge () kana ikasarudza kukumbira nhamba chaiyo, asi chikumbiro chakadaro chinogona kukundikana nokuti imwe shanduro inoshandiswa purogiramu ingave ichiri kushandisa ikozvino.
Zvimwe, zvinogona kupa chitubu 0 kuti chisunge () sekubatana kwayo parameter pane. Izvozvo zvinoita kuti chirongwa chekushanda chitsvakurwe nekutsvaga chikwata chakanaka chiripo muTCP / IP yakasimba nhamba yehamba yenhamba.
Cherechedza kuti chigadziro hachizobvumirwi kubvumidzwa nechokuita kwechikwata asi asi pane imwe nzvimbo inoshandiswa. Kubudirira kwegungano rekugadzirira iyi inoshanda. Panzvimbo yega yega yega yekushanda inofanira kushandiswa nekugadzirisa kodhi yekuedza mizinda yakawanda kusvikira yawana imwe yakakodzera, mapurogiramu anogona kuvimba nehutano hwekuita kuti uite saizvozvo.
Unix, Windows, nedzimwe nzira dzekushanda dzinosiyana zvishoma mukubata kwavo kwechiteshi 0, asi kokorodzano yakafanana iyo inoshanda.
Port 0 uye Network Security
Network traffic inotengeswa kune imwe nzvimbo yepamusoro yepamusoro inoteerera pachiteshi 0 inogona kubudiswa kubva kune network networkers kana kuti yakaipa pamapurogiramu akarongwa zvisina kururama. Mhinduro dzemibvunzo iyo mauto anogadzira mukupindura kwechiteshi 0 mutemo unogona kubatsira varwisa kudzidza zvakawanda pamusoro pehutano uye zvingave zvisingakwanisi kutengesa mitambo yezvinhu izvi.
Vakawanda vashandi vepaIndaneti (ISPs) vanovhara chitunha pachiteshi 0 (zvose zvinopinda uye zvinotumira mameseji) kuti vabatsire kurinda izvi.