A Slot Of Time
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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 (OSILayer 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.[1]
- Time slots are for 45 minutes, and begin at the top of the hour (e.g. A max of 5 time slot reservations can be held at one time. Time slot reservations can be made 5 days in advance. Two (2) no shows over a 7 day period will result in a temporary 7 day suspension from the reservation system. Time slots must be cancelled one (1.
- Looking for definition of time slot? Time slot explanation. Define time slot by Webster's Dictionary, WordNet Lexical Database, Dictionary of Computing, Legal Dictionary, Medical Dictionary, Dream Dictionary.
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:[2]
| Speed | Slot time[3] | Time Interval |
|---|---|---|
| 10 Mbit/s | 512 bit times | 51.2 microseconds |
| 100 Mbit/s | 512 bit times | 5.12 microseconds |
| 1 Gbit/s[4] | 4096 bit times | 4.096 microseconds |
| 2.5 Gbit/s onward | no half-duplex operation | |
See DIFS for information on 802.11x slot times.
A Slot Of Time Spent
References[edit]
- ^IEEE 802.3 4.2.3.2.3 Collision handling
- ^IEEE 802.3 4.4.2 MAC parameters
- ^Slot time is only applicable to half-duplex transmissions. Since slot time is the time required to wait for the medium to be free from transmissions, there is no time required to wait for full-duplex transmissions. 1 Gbit/s (in practice) and faster (by standard) are full duplex technologies, so slot time is not applicable here.
- ^theoretical, only full-duplex devices exist
Time Slot In A Sentence
Examples of time slot in a Sentence
Anne Bowen:
Our media will go to zero if we don't completely move our show time and there are no other time slots that day. So this severely adversely affects us. in a perfect world he would move his show to a time slot where there are no other designers showing and let us have our show when we planned it on the 16th at noon but I don’t see him doing that.
James Corden:
I think in the time slot we're in, we have a carte blanche in a way to make a looser show and for it to feel like a more fun environment.
Anne Bowen:
In a perfect world he would move his show to a time slot where there are no other designers showing and let us have our show when we planned it on the 16th at noon but I don’t see him doing that.
Jorn Teske:
Others have a contract in place which might be a bit more complicated in regards to costs they had already and other costs coming up because of preparations which were initiated already, we can just say OK, if we find a time slot then we have these costs. And then we come together or not. This might be a little advantage in our talks.
Oliver Herzfeld:
This is going to be an enormously expensive thing for the network regardless of what they have to pay to settle with Roseanne and whatever guaranteed minimums they have to pay to the cast and crew that has bargaining power. This was an extremely successful reboot and they’re going to lose all the revenue that they were expecting to receive with this show, they’ll have to replace the time slot as well with a show that might not be as successful.