Title CN CHAPTER 3.pdf ✅

12:52 PM d troduction a d Transport Layer Services /; ·· 89% F ' Shashank Sir Priyeshsir Vidhyapeeth Transport ayer Services and Protocols _ . • ltpmvides logical com unication between application processes running on different hosts. • A transport protocols Jun in end systems. • Sender side: It breaks lication messages into segments then passes to network layer. I • Receiver side: It reass1 mbles segments into messages, then passes to _ appJiration layer.. . • &le: TCP and ~!)P[ _ ShashankSir Priyeshsir Vidhyapeeth I 1 -.:,;; I ~ ~ ~~ i.. 'Ci,, I I Shashank Sir PriyeshE
12:53 PM d ~ ~ ! 4G~ .· I \::J ~ .. • ·: 89% Multe lexin and Demultipley· f Pl It f' ('\ l I t \(' I~("/ 1,:rn,11e d.,c, 11 ('Ill muluplr ~0 cl..ct '-, :\ ci d 11 .'\ ll'-f'O I t hr .Hlrr ( I.it C' I ll'-<'d h " I d ('h' \ill 1plr x111~) -·11 Ill 111111 .. ,/11111//1 1/ 1/ 1 r 11 1g f /f ff 1 r /tr I 11 c; ,. lu•,11 lr•1 111 i, , ' <1 drlivcr ' f'(_(' IVf' d ';('f. llH'll f c; , ,, ' urrr•r t c; ,l( kc, a::Jl vxki•t r .. Shashank Sir Priyeshsir Vidhyapeeth How Demulti lexin works? • A host PC receives IP datagrams. • Each datagram has source IP address and destination IP address. • Each datagram carries one transport-layer segment. • ~ch e_gment has source and destination port number. • A host PC uses :IP addresses & port numbers to dire~t segment to --- -~ appro_pri -· _ S.Q.Cket. Shashank Sir Priyeshsir Vidhyapeeth , O'f!~te socket with host..tocal port #: • Oiilt.S'iil~ci(et mySocket J. .: 11ew Data1ramSocket( 12 S34 ); • After aejtins data~r.m, must specjfy: • deitination IP ,uitire,11 • de~tination port # • When host receives UDP segment: • tt checks destinition port# in ,e&ment ind direcu UDP se&ment to i Ocket with that port#. • IP datagrams with same destination port #, but different source IP addresses and/ or source port numbers will be directed to same socket at destination. Priyeshf
Shashank Sir Priyeshsir Con ectionless Demu Da taq1.am~nr•l< ,. t myso c k~t2 • nPw Oat l'IQTl'lffll'IOC'l!P t ( Q1 "-7 ) ------ tJ ~ ,, I i,t ,, 1'1 I''\ I:,\ ~. I Shashank Sir • C'U t ce port 6428 de~l po•t 9157 ''" t- "'l r .otm.llr,r.),,. t- myq,.,r, i,,. t-. 1 - n,..,, r '" t "'J' " m qr,r!i,,. ti ... , , t, ) II I ~ou1co port ,. 7 - dest port 1 Priyeshsir_ Vidhyapeelh Connectio -Oriented Demulti lexin • TCP socket identified by -tuple: ~ Sourre IP address / ;, Sou~pJl_rl nu_mbe1/ ;, Oesti _j:>nJIP_address , Oe~~~tion port numb r • When TCP segment ar[iV ~, receiver vses all four values to direct(demultiplex) segment to .appropriate soc:...ket. • Server host may .support many simultaneous TCP_sockets: ;, fat:h soc::ket identified lpy .its own 4•tuple. _ Tklti\vtk 'lofA, DownloaJ OPP From Our Application & Solve by Yourself .. .t ,. , ·• ; r· ... i I j I I . ' I . . . I . ! I . . ' . . ' ~ ... , . r -
Shashank Sir User Datagram Protocol Priyeshsir Vidhyapeeth Connectionless Trans ort - UDP . • User Datagram Protocol - Transport layer protocol. • ltta'kes message from application process, attach source & destination port#for Multiplexing/Demultiplexing then pass to network layer. • MakinR best effort to deliver the segment. • No__handshaking between sender and receiver in transport layer. • So.,, thatUDP is connectionless protocol. E.g. DNS_J SNMP, RIP • UDJ_:>used in st,:_~~mjng_~ultimedia apps (loss tolerant, rate sensitive). Shashank Sir Priyeshsir Vidhyapeeth nt Head r ')/ r )I 1~ t lJ~.1:i llll> ~ r ~ ,}_ I [ ~ I J Jl1 I ,W21' ~ l!il •--- ( 1 I Jir l ) Shashank Sir Priyeshf,'