Layer 2 - The Data Link Layer

Written on 9:46 AM by ooe

7 Application
6 Presentation
5 Session
4 Transport
3 Network

2 Data Link<== Performs Physical Addressing
This layer provides reliable transit of data across a physical link.
Combines bits into bytes and bytes into frames
Access to media using MAC address
Error detection, not correction
LLC and MAC
Logical Link Control performs Link establishment
MAC Performs Access method



PDU - Frames

1 Physical

Preamble is arrangement of 1’s and 0’s signifies the alpha of a frame

DataLen decides the breadth of Data, can be 64 to 1500 Bytes is alleged as MTU

FCS is acclimated for absurdity detection

CRC run on the abstracts acreage and and the ethics is kept in FCS

Posted in The OSI Model