What is TCP/IP?
- Transmission control Protocol/Internet Protocol
- Developed by DARPA
- No official protocol standard
TCP/IP Layers
- Application
- Transport
- Internet
- Network Access (Host-to-network)
Application Layer
- Handles high-level protocols, issues of representation, encoding, and dialog control.
- The TCP/IP combines all application-related issues into one layer, and assures this data is properly packaged for the next layer.
- FTP, HTTP, SMNP, DNS ...
- Format of data, data structure, encode …
- Dialog control, session management …
Transport Layer
- The transport layer deals with the quality-of-service issues of reliability, flow control, and error correction.
Segments, data stream, datagram.
- Connection oriented and connectionless.
- Transmission control protocol (TCP).
- User datagram protocol (UDP).
- End-to-end flow control.
- Error detection and recovery.
Internet Layer
- Send source packets from any network on the internetwork and have them arrive at the destination independent of the path and networks they took to get there.
- Packets, Logical addressing.
- Internet Protocol (IP).
- Route , routing table, routing protocol.
Network Access Layer
- Concerned with all of the issues that an IP packet requires to actually make the physical link. All the details in the OSI physical and data link layers.
- Electrical, mechanical, procedural and functional specifications.
- Data rate, Distances, Physical connector.
- Frames, physical addressing.
- Synchronization, flow control, error control.
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