A zero CIR means that every frame is eligible to be discarded. This means that when congestion arises, any frame can be thrown out by the network. Since you have no guarantee of service with a zero CIR setting, you would want to avoid it.
virtual circuit
virtual path identifier and virtual circuit identifier
The answer depends on what exactly you mean by VC: virtual channel, virtual circuit or something else.
Difference between a PVC-Permanent Virtual Circuit and SVC-Switched Virtual Circuit is that an SVC must be reestablished each time data is to be sent. After that SVC disappears.
Virtual Circuit
2^16 = 65536 virtual circuits
Comparison of Datagram and Virtual Circuit SubnetIssue Datagram Virtual CircuitConnection SetupNoneRequiredAddressingPacket contains full source and destination addressPacket contains short virtual circuit number identifier.State informationNone other than router table containing destination networkEach virtual circuit number entered to table on setup, used for routing.RoutingPackets routed independentlyRoute established at setup, all packets follow same route.Effect of router failureOnly on packets lost during crashAll virtual circuits passing through failed router terminated.Congestion controlDifficult since all packets routed independently router resource requirements can vary.Simple by pre-allocating enough
When there is a very current flow with virtual no voltage caused a hard wire short
When you have multiple circuits connected to a site, the entire circuit is known as a "distribution circuit" or a "feeder circuit." These circuits distribute electricity from a central source to various points of use within the site.
Robux is the virtual currency in Roblox that allows players to buy various items. Players can obtain Robux by purchasing it with real currency, from a recurring stipend given to members with premium membership, and from other players by producing and selling virtual content in Roblox.
Virtual Circuit is Created. Each circuit is known by its DLCI. i.e. Data Link Connection Identifier.
layer 4 - transport layer