servisiservisi nnaa internetu internetu -- uvoduvodtelekomunikacije.etf.rs/predmeti/ot4ai/servisi -...

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Servisi Servisi na na Internetu Internetu - uvod uvod - dr dr Nenad Nenad Krajnovi Krajnović Katedra za telekomunikacije Katedra za telekomunikacije Elektrotehnički fakultet Beograd Elektrotehnički fakultet Beograd

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Page 1: ServisiServisi nnaa Internetu Internetu -- uvoduvodtelekomunikacije.etf.rs/predmeti/ot4ai/Servisi - uvod.pdf · ServisiServisi nnaa Internetu Internetu-- uvoduvod --ddrr Nenad Nenad

ServisiServisi nana InternetuInternetu

-- uvoduvod --

drdr Nenad Nenad KrajnoviKrajnovićć

Katedra za telekomunikacije Katedra za telekomunikacije

Elektrotehnički fakultet BeogradElektrotehnički fakultet Beograd

Page 2: ServisiServisi nnaa Internetu Internetu -- uvoduvodtelekomunikacije.etf.rs/predmeti/ot4ai/Servisi - uvod.pdf · ServisiServisi nnaa Internetu Internetu-- uvoduvod --ddrr Nenad Nenad

Kako Kako ““radiradi”” GMAIL?GMAIL?

©Krajko©Krajko 22

Page 3: ServisiServisi nnaa Internetu Internetu -- uvoduvodtelekomunikacije.etf.rs/predmeti/ot4ai/Servisi - uvod.pdf · ServisiServisi nnaa Internetu Internetu-- uvoduvod --ddrr Nenad Nenad

GMAILGMAIL

INTERNET

HTTPS

saobraćaj

©Krajko©Krajko 33

INTERNET

Podržava IPv6 u komunikaciji.

Page 4: ServisiServisi nnaa Internetu Internetu -- uvoduvodtelekomunikacije.etf.rs/predmeti/ot4ai/Servisi - uvod.pdf · ServisiServisi nnaa Internetu Internetu-- uvoduvod --ddrr Nenad Nenad

GMAILGMAIL

INTERNET

(SM

TP

)

SMTP

©Krajko©Krajko 44

(IMAP4, POP3)(S

MT

P)

U internoj komunikaciji

Google verovatno

koristi i neke druge

protokole

Page 5: ServisiServisi nnaa Internetu Internetu -- uvoduvodtelekomunikacije.etf.rs/predmeti/ot4ai/Servisi - uvod.pdf · ServisiServisi nnaa Internetu Internetu-- uvoduvod --ddrr Nenad Nenad

Gmail i IPv6Gmail i IPv6To ensure that Gmail can identify you:To ensure that Gmail can identify you:

–– Use a consistent IP address to send bulk mail.Use a consistent IP address to send bulk mail.

–– Keep valid reverse DNS records for the IP address(Keep valid reverse DNS records for the IP address(eses) from which you send mail, pointing to ) from which you send mail, pointing to

your domain. Use the same address in the 'From:' header on every bulk mail you send.your domain. Use the same address in the 'From:' header on every bulk mail you send.

We also recommend the following:We also recommend the following:–– Sign messages with DKIMSign messages with DKIM11. We do not authenticate messages signed with keys using fewer . We do not authenticate messages signed with keys using fewer

than 1024 bits.than 1024 bits.

–– Publish an SPFPublish an SPF22 record.record.–– Publish an SPFPublish an SPF record.record.

–– Publish a DMARCPublish a DMARC33 policy.policy.

Additional guidelines for IPv6Additional guidelines for IPv6–– The sending IP must have a PTR record (i.e., a reverse DNS of the sending IP) and it should The sending IP must have a PTR record (i.e., a reverse DNS of the sending IP) and it should

match the IP obtained via the forward DNS resolution of the hostname specified in the PTR match the IP obtained via the forward DNS resolution of the hostname specified in the PTR

record. Otherwise, mail will be marked as spam or possibly rejected.record. Otherwise, mail will be marked as spam or possibly rejected.

–– The sending domain should pass either SPF check or DKIM check. Otherwise, mail might be The sending domain should pass either SPF check or DKIM check. Otherwise, mail might be

marked as spam.marked as spam.

©Krajko©Krajko 55

1 www.dkim.org

DomainKeys

Identified Mail

2 www.openspf.org

Sender Policy

Framework

3 dmarc.org

Domain-based Message

Authentication, Reporting &

Conformance

Page 6: ServisiServisi nnaa Internetu Internetu -- uvoduvodtelekomunikacije.etf.rs/predmeti/ot4ai/Servisi - uvod.pdf · ServisiServisi nnaa Internetu Internetu-- uvoduvod --ddrr Nenad Nenad

Kako Kako ““radiradi”” Facebook?Facebook?

©Krajko©Krajko 66

Page 7: ServisiServisi nnaa Internetu Internetu -- uvoduvodtelekomunikacije.etf.rs/predmeti/ot4ai/Servisi - uvod.pdf · ServisiServisi nnaa Internetu Internetu-- uvoduvod --ddrr Nenad Nenad

FacebookFacebook

INTERNET

HTTPS

saobraćaj

©Krajko©Krajko 77

INTERNET

Podržava IPv6 u komunikaciji.

Page 8: ServisiServisi nnaa Internetu Internetu -- uvoduvodtelekomunikacije.etf.rs/predmeti/ot4ai/Servisi - uvod.pdf · ServisiServisi nnaa Internetu Internetu-- uvoduvod --ddrr Nenad Nenad

Kako Kako ““radiradi”” YouTube?YouTube?

©Krajko©Krajko 88

Page 9: ServisiServisi nnaa Internetu Internetu -- uvoduvodtelekomunikacije.etf.rs/predmeti/ot4ai/Servisi - uvod.pdf · ServisiServisi nnaa Internetu Internetu-- uvoduvod --ddrr Nenad Nenad

YouTubeYouTube

INTERNET

DNS

saobraćaj

©Krajko©Krajko 99

INTERNET

HTTP HTTP

saobraćajsaobraćaj

Podržava IPv6 u komunikaciji.

Page 10: ServisiServisi nnaa Internetu Internetu -- uvoduvodtelekomunikacije.etf.rs/predmeti/ot4ai/Servisi - uvod.pdf · ServisiServisi nnaa Internetu Internetu-- uvoduvod --ddrr Nenad Nenad

ServisiServisi nana InternetuInternetu

-- uvoduvod --

ddr r Nenad Nenad KrajnoviKrajnovićć

Katedra za telekomunikacije Katedra za telekomunikacije

Elektrotehnički fakultet BeogradElektrotehnički fakultet Beograd