Changes of string in 37526: In a network using virtual circuits, all hosts are also identified with a network layer address. However, packet forwarding is not performed by looking at the destination address of each packet. With the `virtual circuit` organization, each data packet contains one label [#flabels]_. A label is an integer which is part of the packet header. Routers implement `label switching` to forward `labelled data packet`. Upon reception of a packet, a router consults its `label forwarding table` to find the outgoing interface for this packet. In contrast with the datagram mode, this lookup is very simple. The `label forwarding table` is an array stored in memory and the label of the incoming packet is the index to access this array. This implies that the lookup operation has an `O(1)` complexity in contrast with other packet forwarding techniques. To ensure that on each node the packet label is an index in the `label forwarding table`, each router that forwards a packet replaces the label of the forwarded packet with the label found in the `label forwarding table`. Each entry of the `label forwarding table` contains two pieces of information : @ Weblate

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In a network using virtual circuits, all hosts are also identified with a network layer address. However, packet forwarding is not performed by looking at the destination address of each packet. With the `virtual circuit` organization, each data packet contains one label [#flabels]_. A label is an integer which is part of the packet header. Routers implement `label switching` to forward `labelled data packet`. Upon reception of a packet, a router consults its `label forwarding table` to find the outgoing interface for this packet. In contrast with the datagram mode, this lookup is very simple. The `label forwarding table` is an array stored in memory and the label of the incoming packet is the index to access this array. This implies that the lookup operation has an `O(1)` complexity in contrast with other packet forwarding techniques. To ensure that on each node the packet label is an index in the `label forwarding table`, each router that forwards a packet replaces the label of the forwarded packet with the label found in the `label forwarding table`. Each entry of the `label forwarding table` contains two pieces of information :

English 1150 characters edited Current translation State: Read-only

3 years ago

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