The 802.11a standard uses the same data link layer protocol and frame format as the original standard, but an OFDM based air interface ( physical layer ).
42.
A network switch is a multiport network bridge that uses hardware addresses to process and forward data at the data link layer ( layer 2 ) of the OSI model.
43.
By separating the Packet-Layer Protocol, ISO 8208 permits operation over additional networks such as ISO 8802 LLC2 ( ISO LAN ) and the OSI data link layer.
44.
In the Internet Protocol Suite ( TCP / IP ), the data link layer functionality is contained within the link layer, the lowest layer of the descriptive model.
45.
For digital audio and digital video, this can be thought of as defining the physical layer, data link layer, and most or all of the application layer.
46.
Interoperability with Novell Netware is generally implemented at the applications and systems programming level rather than at the kernel and data link layer and therefore further from the physical hardware.
47.
Within the service layering semantics of the OSI network architecture, the network layer responds to service requests from the transport layer and issues service requests to the data link layer.
48.
In order to accomplish this a layer 2 ( See : OSI model # Layer 2 : data link layer ) connection is required between the user and the VBN gateway.
49.
The DECT data link layer uses Link Access Protocol Control ( LAPC ), a specially designed variant of the ISDN data link protocol called LAPD . They are based on HDLC.
50.
The Point-to-Point Protocol ( PPP ) is a data link layer protocol that can operate over several different physical layers, such as synchronous and asynchronous serial lines.
