Slot time is a concept in computer networking. It is at least twice the time it takes for an electronic pulse (OSI Layer 1 - Physical) to travel the length of the maximum theoretical distance between two nodes. In CSMA/CD networks such as Ethernet, the slot time is an upper limit on the acquisition of the medium, a limit on the length of a packet fragment generated by a collision, and the scheduling quantum for retransmission. Some times for Ethernet slot time include: See DIFS for information on 802.11x slot times.
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| - Slot time is a concept in computer networking. It is at least twice the time it takes for an electronic pulse (OSI Layer 1 - Physical) to travel the length of the maximum theoretical distance between two nodes. In CSMA/CD networks such as Ethernet, the slot time is an upper limit on the acquisition of the medium, a limit on the length of a packet fragment generated by a collision, and the scheduling quantum for retransmission. Some times for Ethernet slot time include: See DIFS for information on 802.11x slot times. (en)
- Lo slot time nelle reti Internet è il tempo che impiega un (livello 1 del modello OSI) a compiere il tragitto di massima distanza teorica tra due nodi. Nelle reti CSMA/CD come le ethernet, la NIC (Network Interface Card) attende almeno questo tempo prima di trasmettere, permettendo così all'impulso di giungere alla NIC di destinazione. Lo slot time dovrebbe essere una costante, indipendente dalla struttura della rete locale, standard di tutte le reti CSMA/CD che fanno uso di una specifica NIC. I comuni intervalli di slot time sono: (it)
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| - Slot time is a concept in computer networking. It is at least twice the time it takes for an electronic pulse (OSI Layer 1 - Physical) to travel the length of the maximum theoretical distance between two nodes. In CSMA/CD networks such as Ethernet, the slot time is an upper limit on the acquisition of the medium, a limit on the length of a packet fragment generated by a collision, and the scheduling quantum for retransmission. Since a pulse's runtime will never exceed slot time (the maximum theoretical time for a frame to travel a network), the network interface controller, or NIC waits a minimum of slot time before retransmitting after a collision happened, in order to allow any pulse that was initiated at the time that the waiting NIC was requested to send, to reach all other nodes. By allowing the pulse to reach the waiting NIC, a local collision occurs (i.e. while still sending) rather than a late collision occurring (after sending may or may not have ended). By having the collision occur at the NIC (local) and not on the wire (late) CSMA/CD implementation recover the situation by retransmitting later. Some times for Ethernet slot time include: See DIFS for information on 802.11x slot times. (en)
- Lo slot time nelle reti Internet è il tempo che impiega un (livello 1 del modello OSI) a compiere il tragitto di massima distanza teorica tra due nodi. Nelle reti CSMA/CD come le ethernet, la NIC (Network Interface Card) attende almeno questo tempo prima di trasmettere, permettendo così all'impulso di giungere alla NIC di destinazione. Lo slot time dovrebbe essere una costante, indipendente dalla struttura della rete locale, standard di tutte le reti CSMA/CD che fanno uso di una specifica NIC. Questa strategia permette alle modalità di trasmissione half-duplex l'invio di pacchetti su linea presumibilmente libera. La tecnologia a 10 Gbit/s è full-duplex, pertanto non utilizza lo slot time. I comuni intervalli di slot time sono: dove bit time = 1 / velocità (ad esempio, il bit time nella tecnologia 10 Mbit/s è 0,1 microsecondi) (it)
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