Questions tagged [latency]
For questions about network latency. For instance: the propagation of your network traffic, where the transmission medium can be defect or the processing of packets by a network device has slowed down.
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What is the time of sending/receiving a network packet comprised of?
When I do a traceroute, I can see the round trip time in milliseconds or "ms", for my packet(s) to reach that point and return to my computer.
Let the round trip time be the variable x. For ...
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cut-through vs store-and-forward switching
Let's say we have a host A that is sending 1bit of data (I know it is impossible practically) at at rate of 1bps to host B. Host A and Host B are connected via 2 switches. We assume that the ...
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How to solve high ping "spikes" to pfSense when ipSec connections are active?
Background information:
We have latency/freeze problems with our pfSense. To be able to answer the question i will first give some general background information:
We run pfSense V2.6.0 on following ...
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Measuring Latency between my local network hops [closed]
I have to measure the latency in my local network and also between each hop. I used the conventional tools like ping, tracert, pathping etc. But the problem is here these tools have there own protocol ...
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How to benchmark time a packet spend in each OSI layer?
I'm benchmarking latency of sending a TCP packet from a client to a server. The payload of the packet is the nanosecond timestamp (using clock_gettime() on Linux) right before the send() socket ...
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Optimal segment size for store-and-forward switching [closed]
Suppose we are transmitting a file of size X bits from A to B. They are connected to each other with a single switch using store-and-forward switching. Before transmission, A splits the file into ...
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Latency between a churn and congestion event triggered in the TCP code
I am analyzing the time it takes between a churn occurring in the network (e.x. that causes packet drops or delays) and when the congestion event handling codes are triggered in the TCP kernel in the ...
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If TCP packets are pre acknowledged, what happens if packets are dropped?
On a VSat link with 800ms RTT latency and 10mbps bandwidth, that means 1MB bandwidth-delay product (data in flight).
According to this useful (but closed) Q/A, packets are injected on both sides of ...
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T_Latency = T_Propagation + T_Transmit + T_Queue? [duplicate]
I am currently learning about the so-called 'physical layer' of a computer network. The following claim is made:
The latency of a message is the total time for the whole message to arrive:
T_Latency =...
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Network speeds severely impacted by latency [closed]
I'm troubleshooting a situation where clients in far off locations with high latency connections to our network are experiencing severely adverse network transfer speeds.
If I run a speed test from ...
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Why does ping interval affect latency?
The following article on Google Cloud describes measuring latency, and uses ping and netperf.
https://cloud.google.com/blog/products/networking/using-netperf-and-ping-to-measure-network-latency
It ...
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Transmission and propagation delays
I am now working through book "Computer Networking - A Top Down Approach", and there is one question among others after the first chapter:
"Consider two hosts, A and B, connected by a ...
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Will TCP packets smaller than the full bandwidth of its link travel at the same speed?
If I send 5bytes over a 1mbps connection will that travel faster than 500bytes. Or is the latency after propagation going to be constant since the packet is under 1mb?
If you downvote because you ...
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How can the latency value be so low from Singapore to USA (~2ms)?
Here's the ping output from Singapore:
64 bytes from 8.8.8.8: icmp_seq=1 ttl=50 time=1.96 ms
Singapore to 8.8.8.8 = ~2ms
Another ping output:
64 bytes from 23.59.8.146: icmp_seq=81 ttl=44 time=66.1 ...
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Copper or Glass for Low Latency?
I'd like to preface the main content of this post with the following: I understand this question may be equally suited to the Physics Stack Exchange, and so I have posted on there as well, but maybe a ...
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