Das Video kommt von YouTube: erst beim Abspielen verbindet sich die Seite mit YouTube (Google).
Latency - Intro to Computer Science
Das Wichtigste aus dem Video
Tipp auf eine Zeit – das Video springt genau dorthin.
Transkriptautomatisch erstellt · 20 Zeilen
- I want to talk about the two main ways to measure a network. Those are called Latency and Bandwidth.
- What they mean is very different. They're often confused. Often people say bandwidth when they mean latency, or
- say latency when they mean bandwidth. They're quite different things. So let me explain what they are. So
- latency is the time that it takes for a message to get from the source to the destination.
- And that's for the start of the message. So, we can measure latency by timing when you start sending to the time
- that the receiver starts receiving. So this is the unit of time. It will be measured in something like seconds. For a fast
- network today, it's more often measured in milliseconds and there are 1000 milliseconds in one second.
- So now, you understand about latency. And when I go back to the Greek signaling network. So, suppose now
- that Zeus, who is all powerful, wanted to send a message from Rhodes to Sparta. And he thought that the
- latency of the smoke signal network as it was currently set up was too high, that it takes too
- long for the message that he sends starting from Rhodes to reach Sparta. So the question is, how could Zeus,
- and remember that in ancient Greece, Zeus was all powerful, reduce the latency between Rhodes and Sparta. So
- here are the choices. It makes the signalling nodes further apart. So instead of going from Rhodes to
- Naxos to Millios to Sparta, maybe it would have to go one hop. There would be a new
- island in the middle here, and it could go from Rhodes to the new island and then to Sparta.
- He could threaten the soldiers at all the signalling points and scare them into working harder, so they start the fires more quickly,
- when they need to send a message. He could find a way to make it so instead of just sending one color smoke, you
- could send different colors smoke. That would mean that with the same amount of smoke, you could send more different messages. Or he could
- increase the speed of light. That would mean that the the soldiers at each signaling point would see the previous smoke signal more quickly
- than they do now.
Zum Nachlesen
PaketumlaufzeitTypische Messwerte ; ADSL 2000 ohne Fastpath, 55 ms ; ISDN (mit kleinen Paketen deutlich kürzer), 200 ms ; UMTS, 300–400 ms ; GPRS, 700–1000 ms …
Verzögerung (Telekommunikation)Verzögerung (engl. Delay), auch Latenzzeit oder Latenz, tritt in der Telekommunikation auf als. das Zeitintervall, um das ein Ereignis verzögert wird; …
Column Address Strobe LatencyDie Column Address Strobe Latency (englisch, kurz CL oder CAS Latency), auch Speicherlatenz oder kurz Latenz genannt, ist die benötigte Zeit um eine Spalte …
Ping (Datenübertragung)Ping ist ein Diagnose-Werkzeug, mit dem überprüft werden kann, ob ein bestimmter Host in einem IP-Netzwerk erreichbar ist. Daneben geben die meisten …