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PPP TDM Synchronous Optical Networks xDSL WLAN PDF

70 Pages·2014·5.16 MB·Swedish
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Preview PPP TDM Synchronous Optical Networks xDSL WLAN

ETSF05 – Internet Protocols PPP TDM Synchronous Optical Networks xDSL WLAN Jens A Andersson Routing • Konsten att bygga least‐cost trees • Från sändare till mottagare • Från varje nod till varje annan nod • Tre principer • Distance Vector • Link State • Path Vector • Policy‐based routing 22014‐09‐29 ETSF05 Internet Protocols Point‐to‐point protocol (PPP) • Direct connection between two nodes – Internet access – Home user to ISP • Telephone line • Cable TV PPP 2014‐09‐29 ETSF05 Internet Protocols 3 State transitions in PPP • We need more protocols LCP Link Control Authentication (LCP) Network Control Data  (NCP) Transfer 2014‐09‐29 ETSF05 Internet Protocols 4 PPP frame format • Support for several (sub)protocols • Address & control not used • Maximum payload 1500 bytes 2014‐09‐29 ETSF05 Internet Protocols 5 Link control protocol (LCP) • Establish • Configure • Terminate Options • Maximum receive unit (payload size) • Authentication protocol (none/PAP/CHAP) • Protocol field compression (on/off), • Address and control field compression (on/off) 2014‐09‐29 ETSF05 Internet Protocols 6 Authentication protocols (AP) • Password authentication (PAP) 2014‐09‐29 ETSF05 Internet Protocols 7 Authentication protocols (AP) • Challenge handshake authentication (CHAP) 2014‐09‐29 ETSF05 Internet Protocols 8 Network control protocols (NCP) • Preparations for the network layer – IPCP for Internet 2014‐09‐29 ETSF05 Internet Protocols 9 IP datagram encapsulation in PPP 2014‐09‐29 ETSF05 Internet Protocols 10

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Sep 29, 2014 Routing. • Konsten att bygga least-cost trees. • Från sändare till mottagare. • Från varje nod till varje annan nod. • Tre principer. • Distance
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