Transport message network packets data link frames sas

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Unformatted text preview: l Process (message) REXEC / SMTP / TELNET / FTP / DNS / RPC / Local Apps. Transport (message) Network (packets) Data Link (frames) SAS Institute Inc. Institute Cary, NC UDP TCP ICMP IP (R)ARP Ethernet Token-Ring FDDI X.25 SNA Hyperchannel Proprietary SAS/C & C++ Compiler R&D Slide 8 Feb. 1998 C Socket Programming Tutorial SHARE Session 5958 Internet Protocol (IP) U U U Establishes a “virtual” network between hosts, independent of the underlying network topology Provides “routing” throughout the network, using IP addressing. For example: 149.173.70.9 Features • • • Best-effort packet delivery Connectionless (stateless) Unreliable UDP TCP IP Physical Network SAS Institute Inc. Institute Cary, NC SAS/C & C++ Compiler R&D Slide 9 Feb. 1998 C Socket Programming Tutorial SHARE Session 5958 User Datagram Protocol (UDP) U U U Application Interface to IP - Packet Oriented Establishes a “port”, which allows IP to distinguish among processes running on the same host Features resemble IP semantics • • •...
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This document was uploaded on 02/14/2014.

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