TCP/IP Model of Networking

TCP/IP Model - Layers Access Internet Transport Application

TCP/IP and Protocols Application Layer HTTP, HTTPSFTP, TFTPDHCP, DNSPOP3, SMTP, IMAP

TCP/IP and Protocols Transport Layer TCPUDP

TCP/IP and Protocols Internet Layer IPICMP

TCP/IP and Protocols Access Layer EthernetWiFiPoint to Point

TCP/IP and Functions Application Layer Data is created and usedClient and/or Server Software

Client Server Networks

TCP/IP and Functions Transport Layer TCP – 3 Way HandshakeUDP – Request, Send

3 Way Handshake Request OK, Here are my Rules OK, Fine OK, Here are my Rules Data

TCP/IP and Functions Internet Layer IP - Addressing of NodesIP – Best Path DeliveryICMP – Diagnostic and ID

TCP/IP and Functions Access Layer Local Delivery

TCP/IP and Encapsulation Application Layer Produces DataEncryption, Compression

TCP/IP and Encapsulation Transport Layer Segments DataPort Numbers Added

Well Know Port Numbers ApplicationPort Number FTP20, 21 Telnet23 SMTP25 DNS53 TFTP69 HTTP80 HTTPS443 DHCP546, 547

TCP/IP and Encapsulation Internet Layer Adds IP AddressesNow called a Packet

Socket IP Address: Port Number Or URL: Port Number

TCP/IP and Encapsulation Access Layer Adds MAC Address for local deliveryNow called a Frame

TCP/IP and Dencapsulation Access Layer Reads MAC AddressChecks for ErrorsShould I read it?

TCP/IP and Decapsulation Internet Layer Reads IP AddressShould I read it?

TCP/IP and Decapsulation Transport Layer Reads Port NumberTCP – Put message togetherWhich App should I send it to?

TCP/IP and Decapsulation Application Layer Uses Data

There and Back Again