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what are the advantatages of a packet switching network over a circuit switching one?

Posted on 2007-11-17
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what are the advantatages of a packet switching network over a circuit switching one?
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Question by:amir82
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by:skinnyquiver
ID: 20306743
Packet swiching can be set up connectionless this being so that the network dosn't have to worry about the destination as much as circuit switching where it is a set active link from one point to another.
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by:amir82
ID: 20306774
thank you and please send me more details about that inform me about specifics of packet switching and circuit switching
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skinnyquiver earned 250 total points
ID: 20308973
Packet switching is used to optimize the use of the channel capacity available in a network, to minimize the transmission latency
The most well-known use of packet switching is the Internet and local area networks.
X.25 is a notable use of packet switching in that, despite being based on packet switching methods, it provided virtual circuits to the user. These virtual circuits carry variable-length packets In 1978, X.25 was used to provide the first international and commercial packet switching network, the International Packet Switched Service (IPSS). Asynchronous Transfer Mode (ATM) also is a virtual circuit technology, which uses fixed-length cell relay connection oriented packet switching.

Datagram packet switching is also called connectionless networking because no connections are established. Technologies such as Multiprotocol Label Switching (MPLS) and the Resource Reservation Protocol (RSVP) create virtual circuits on top of datagram networks. Virtual circuits are especially useful in building robust failover mechanisms and allocating bandwidth for delay-sensitive applications.

MPLS and its predecessors, as well as ATM, have been called "fast packet" technologies. MPLS, indeed, has been called "ATM without cells" [1]. Modern routers, however, do not require these technologies to be able to forward variable-length packets at multigigabit speeds.


In telecommunications, a circuit switching network is one that establishes a fixed bandwidth circuit (or channel) between nodes and terminals before the users may communicate, as if the nodes were physically connected with an electrical circuit. The bit delay is constant during the connection, as opposed to packet switching, where packet queues may cause varying delay.

Each circuit cannot be used by other callers until the circuit is released and a new connection is set up. Even if no actual communication is taking place in a dedicated circuit then, that channel still remains unavailable to other users. Channels that are available for new calls to be set up are said to be idle.

Virtual circuit switching is a packet switching technology that may emulate circuit switching, in the sense that the connection is established before any packets are transferred, and that packets are delivered in order.



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by:amir82
ID: 31409772
thanks for your kindness
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