Transcript Lecture01
Internet Technology & Network Management Subject Code: IT 603 Information Technology Lucky Sharma www.lucky.pentaclesoftwares.com Lecture # 01 Syllabus Outline Unit One: ARP, RARP, IP, IP v4 Vs v5. Unit Two: ICMP, IP routing protocols, IGMP. Unit Three: TCP & UDP. Unit Four: BOOTP, DHCP, DNS, FTP, TFTP, Email protocols, SNMP. Unit Five: Network management applications. 2 Lecture # 01 - Agenda 1. Introduction to TCP / IP Protocol suite model 3 What Is TCP/IP? 1. The large collection of networking protocols and services called TCP/IP denotes far more than the combination of the two key protocols that gives this collection its name. 2. These protocols deserve an initial introduction: Transmission Control Protocol, or TCP, handles reliable delivery for messages of arbitrary size, and defines a robust delivery mechanism for all kinds of data across a network 4 The Origins and History of TCP/IP In 1969, an obscure arm of the United States Department of Defense (DoD), known as the Advanced Research Projects Agency (ARPA), funded an academic research project for a special type of long-haul network, called a packet-switched network In a packet-switched network, individual chunks of data (called packets) can take any usable path between the sender and receiver The network built as a result of this project is known as the ARPANET TCP/IP’s Design Goals The design of the ARPANET and protocols that evolved to support it were based on the following government needs: A desire to withstand a potential nuclear strike A desire to permit different kinds of computer systems to easily communicate with one another A need to interconnect systems across long distances Who “Owns” TCP/IP? Given that its roots are everywhere, and that its reach is unlimited, the ownership and control of TCP/IP is puzzling TCP/IP falls squarely into the public domain because it’s been funded with public monies since its inception Meet the Standards groups that Manage TCP/IP The standards groups that are involved with TCP/IP are as follows: Internet Society (ISOC) Internet Architecture Board (IAB) Internet Engineering Task Force (IETF) Internet Research Task Force (IRTF) Internet Societal Task Force (ISTF) Internet Corporation for Assigned Names and Numbers (ICANN) TCP/IP Standards and RFCs Within the collection of RFCs, older versions of RFCs are sometimes (or often) replaced by newer, more up-to-date versions Each RFC is identified by a number, and “new numbers” fall at present in the 3300s range One special RFC is titled “Internet Official Protocol Standards” At this writing, the current version of that RFC is numbered 2700 TCP/IP Standards and RFCs RFC 2026 describes how an RFC is created, and what processes it must go through to become an official standard, adopted by the IETF A potential standard RFC goes through three phases on its way to becoming a standard It starts as a Proposed Standard; moves up to a Draft Standard; and, if formally adopted, becomes an Internet Standard, or a Standard RFC Eventually, such an RFC can also be designated as a Retired Standard, or a Historic Standard, when replaced by a newer RFC TCP/IP Standards and RFCs Best Current Practice (BCP) is another important category for RFCs A BCP does not define a protocol or technical specifications; rather, a BCP defines a philosophy, or a particular approach, to a network design or implementation that is recommended as tried and true, or that enjoys certain desirable characteristics worthy of consideration when building or maintaining a TCP/IP network TCP / IP Protocol Suite Model Application Layer FTP POP DNS TFTP IMAP RPC SMTP HTTP TELNET Transport Layer TCP ARP RARP UDP SCTP Internet Layer ICMP IP Host to Network Layer IGMP Data link Layer Physical Layer Thank You Next Class agenda 1. ARP 2. RARP Catch latest updates at www.lucky.pentaclesoftwares.com 13