Atm adaptation layer validating the atm header Matures sexchat
Place : It lies between AAL layer and physical layer Function : - It multiplexes and demultiplexes cells of different connections.- It also translates VCI and/or VPI values at the switches or cross connections.- In addition it allows an easy multiplexing of different virtual connections over a single link.Information ------- (Structure of ATM CELL) - ATM cells are transported via virtual channels and indrectly in virtual path. A virtual path is made from of a set of these channels .- Logical address ( VPI/VCI ) is translated into a physical outgoing port - Physical address is added to the cell.- The cell is then switched to the correct port where the physical address is stripped off and a new logical address is written in the header. The ATM Adaptation Layer (AAL) defines the rules for breaking up a higher level protocol data unit (PDU) into ATM cells for transmission on the network, and for reassembling the PDU at the other end Segmentation and reassembly (SAR) Download Now An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.
The physical inlet/outlet which is characterized by a physical port number. The logical channel on the physical port which is identified by the VCI and/or the VPI. - Internal routing -It allows the connection (inside the switch) between every input and every output 2.
-It adds to each peice a header which contains information used to reassemble the peices at the destination.