OSI voi TCP/IP giet happydog

[DINH CUONG]

HeHe!! Vi moi tham gia nen dog con "mu nhu mit".Xin duoc hoi may huynh cai OSI voi cai TCP/IP khac nhau va giong nhau o cai cho nao.Thanh Kieu. :helpsmili

[nhpl]

TCP/IP and OSI are both models that specify protocols, formats and standards to which all hardware and software in the network must conform.

The differences between TCP/IP and OSI are as follows:

TCP/IP is a two layer program:
-The higher layer, TCP, manages the assembling of a message or file into smaller packes that are transmitted over the Internet and received by a TCP layer at the receiving end, which then reassembles the packets into the original message.
-The lower layer, IP, handles the address part of each packet so that it gets to the right destination.

TCP/IP also can refer to an entire collection of protocols, called a TCP/IP suite. These include the World Wide Web's Hypertext Transfer Protocol (HTTP); the File Transfer Protocol (FTP); Terminal Emulation (Telnet); and the Simple Mail Transfer Protocol (SMTP).

In the TCP/IP suite, each layer builds upon the layer below, adding new functionality:

Application Layer: Typically interaction with the network. Protocols: FTP, SMTP, SNMP

Transport Layer: Guarantee of data reliability. Protocols: TCP, UDP

Network Layer: Responsible for getting data to its destination. Protocol: IP

Link Layer: Communicate with network hardware. Protocols: IEEE 802.x, PPP, SLIP


OSI model consists of seven layers that contain specific stanđars for each control level:

Level 7. Application layer: (Exist in host computer) is the server application

Level 6. Presentation layer: (Exist in host computer) has codes or how the data will look when they are received.

Level 5. Session layer (Exist in host computer) establishes communications between applications at presentation layer

Level 4. Transport Layer: (Exist in host computer) controls more ađvance flow control functions, such as error checking. This is the layer at which TCP/IP operates.

Level 3. Network layer (Exist in Front-End-Processor - FEP) connects two or more networks. It tells data which direction or route to take to a specific device.

Level 2. Data Link Layer (Exist in FEP and/or Controller) is the hardware dedicated to LAN, such as the Ethernet network interface cards in a PC or server.

Level 1. Physical Layer (Exist in terminal modem) contains the wires, wireless technologies, and electricity that literally connect the computers involved.