TCPIP Model bmp

OSI Model and TCP/IP Encapsulation

Layer Na me

Encapsulation

Segment Packet Frame Bits

Layer No.    Function    Examples

Layer 7	Application Interface to NetWork	Telnet HTTP
Layer 6	Encryption and Other Processing	JPEG ASCII7
Layer 5	Manages Multiple Applications	OS Scheduling
| Layer 4	Provides Reliable and Unreliable Delivery and Error Correction	TCP UDP

Application Presentation Session Transport NetWork Data Link Physical

2

I Routers

Layer 3	Provides Logical Addressing Used by Routers	IP IPX
Layer 2	Access Endpoints with MAC Address Error Detection Correction	802/3 HDLC
Layer 1	Specifies Voltage, Wire Speed, and Pin-Out Cables	El ATI A -232 V.35

Switches