Internet and Intranet RMUTT,

Course Outline 1 st half –Internet overview –TCP/IP protocol –Applications in TCP/IP network 2 nd half –JSP programming –Web Database in basic 2

Text Book Sams Teach Yourself TCP/IP in 24 Hours, Third Edition –Joe CasadJoe Casad Publisher: Sams PublishingPub Date: September 03, 2003 ISBN:

Hour 1. What Is TCP/IP 4

What You'll Learn in This Hour: Networks and network protocols History of TCP/IP Important features of TCP/IP 5

At the completion of this hour, you'll be able to Define the term network Explain what a network protocol suite is Explain what TCP/IP is Discuss the history of TCP/IP List some important features of TCP/IP Identify the organizations that oversee TCP/IP and the Internet Explain what RFCs are and where to find them 6

Networks and Protocols A network is a collection of computers or computer-like devices that can communicate across a common transmission medium 7

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A network protocol is a system of common rules that helps define the complex process of transferring data. The data travels from an application on one computer, through the computer's network hardware, across the transmission medium to the correct destination, and up through the destination computer's network hardware to a receiving application. 9

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Comparing of TCP/IP model and OSI Model TCPUDP TelnetSMTPFTPDNSSNMPNTP IP Ethernet Frame RelayATM ARP ICMP IGMP OSI ModelTCP/IP ModelProtocols in each layer 11

TCP/IP and its related protocols form a complete system defining how data should be processed, transmitted, and received on a TCP/IP network, We call TCP/IP and related protocols is Protocol Suite. 12

The actual act of formatting and processing TCP/IP transmissions is performed by vendor's implementation of TCP/IP. –For example Microsoft TCP/IP Must be aware of the following distinction. –A TCP/IP standard is a system of rules defining communication on TCP/IP networks. –A TCP/IP implementation is a software component that performs the functions and services that enable a computer to participate in a TCP/IP network. 13

The Development of TCP/IP TCP/IP networking represents the synthesis of two developments –The Internet –The local area network (Intranet) 14

The Internet The Internet grew from research originally performed by the United States Department of Defense. In the late 1960s Defense Department officials began to notice that the military was accumulating a large and diverse collection of computers that use proprietary protocols. 15

Proprietary is controlled by a private entity. Defense officials began to –share information considerations of security decentralized –ARPAnet network with no failure points The protocol that supported this interconnectable know as TCP/IP. 16

A few years later –National Science Foundation wanted to build a network to connect research institutions, it adopted ARPAnet's protocol to build the Internet Two important features of TCP/IP –End node verification (No central oversee) –Dynamic routing 17

The Local Area Network (LAN) LANs developed along with the computer industry and were a response to the need for offices to share computer resources –Early LAN protocols did not provide Internet access –As the Internet became more popular, LAN provide complete support for TCP/IP. 18

LAN Network Topology Ring Star Bus 19

TCP/IP Features Logical addressing Routing Name service Error control and flow control Application support 20

Logical Addressing A logical address is an address configured through the network software. In TCP/IP, a computer's logical address is called an IP address. 21

Routing A router is a special device that can read logical addressing information and direct data across the network to its destination. 22

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Name Resolution People might have trouble remembering whether a computer's address is or Name resolution is mapping of domain names to an IP address. TCP/IP's name service system provides for a hierarchy of name servers that supply domain name/IP address mappings for DNS- registered computers on the network. Another common name resolution scheme is the Windows Internet Name Services (WINS) 25

Error Control and Flow Control Checking data –to ensure that the data that arrives is exactly what was sent. TCP/IP's Transport layer defines many of these error-checking, flow-control, and acknowledgment functions. 26

Application Support TCP/IP interface from the network to the applications is accomplished through a system of logical channels called ports. Each port has a number that is used to identify the port. 27

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Standards Organizations and RFCs Several organizations have been instrumental in the development of TCP/IP and the Internet. –Internet Advisory Board (IAB) –Internet Engineering Task Force (IETF) –Internet Research Task Force (IRTF) –Internet Corporation for Assigned Names and Numbers (ICANN) –InterNIC 29

Homework 1 What is the responsibilities of organization from previous slide? What is RFCs and related document? 30