Data Link Layer 2

This layer deals with getting data across a specific medium and individual links by providing one or more data link connections between two network entities. End points are specifically identified, if required by the Network layer Sequencing. The frames are maintained in the correct sequence and there are facilities for Flow control and Quality of Service parameters such as Throughput, Service Availability and Transit Delay.

Examples include:

• IEEE 802.2
• IEEE 802.3
• 802.5 - Token Ring
• HDLC
• Frame Relay
• FDDI
• ATM
• PPP