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هل تقصدين :
frame switching ?

Using frame switches to speed up network traffic.
For example, when a 10Base-T Ethernet hub is replaced with an Ethernet frame switch, each sending and receiving pair of stations obtains the full bandwidth of the network . A network device that switches variable-length packets from sender to receiver. Ethernet, Token Ring and FDDI switches are examples. .Using cell switches to forward fixed-length packets in a network.(Asynchronous Transfer Mode) A network technology for both local and wide area networks (LANs and WANs) that supports real-time voice and video as well as data. The topology uses switches that establish a logical circuit from end to end, which guarantees quality of service (QoS). However, unlike telephone switches that dedicate end-to-end circuits, unused bandwidth in ATM's logical circuits can be appropriated when needed. For example, idle bandwidth in a videoconference circuit can be used to transfer data.ATM is widely used as a backbone technology in carrier networks and large enterprises, but never became popular as a local network (LAN) topology . ATM is highly scalable and supports transmission speeds of 1.5, 25, 100, 155, 622, 2488 and 9953 Mbps. ATM is also running as slow as 9.6 Kbps between ships at sea. An ATM switch can be added into the middle of a switch fabric to enhance total capacity, and the new switch is automatically updated using ATM's PNNI routing protocol.

Cell Switching
ATM works by transmitting all traffic as fixed-length, 53-byte cells. This fixed unit allows very fast switches to be built, because it is much faster to process a known packet size than to figure out the start and end of variable length packets. The small ATM packet also ensures that voice and video can be inserted into the stream often enough for real-time transmission.

ATM works at layer 2 of the OSI model and typically uses SONET (OC-3, OC-12, etc.) for framing and error correction out over the wire. ATM switches convert cells to SONET frames and frames to cells at the port interface.

Quality of Service (QoS)
The ability to specify a quality of service is one of ATM's most important features, allowing voice and video to be transmitted smoothly

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cell switch
cell switching
desktop switch
frame switch
LAN switch