Questions tagged [speed]
For questions about network speed. Like bandwidth this tag is suitable when your question is about network congestion, speed, throughput and of course low bandwidth/speed problems.
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why don't they use HDMI cables to connect servers and computers [closed]
HDMI cables are used to transfer video data between 2 devices
considering that it can even transfer very high resolution video data(4k) at very high frame rates, i was thinking why dont we use it to ...
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Different speed between daisy chained switches
What happens with the network link between the PC and Server if the architecture is as follow:
If the Client request UDP-traffic and the Server response will be 1Gbps UDP traffic. Would this result ...
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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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Can propagation speed be measured in bits per second?
In networking, propagation speed is usually measured in meters per second. If we knew how many bits fit in a meter we could multiply these values and end up with a measurement in bits per second. Does ...
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Negotiate at 10 Gbit/s but gain lower speeds due to issues?
During the autonegotiation process, network devices communicate and determine the highest mutually supported data rate. In the case of a network adapter supporting both 10 Gigabit per second (10Gb/s) ...
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802.11ah Wi-Fi HaLow theoretical network throughput with 100s of clients
What is the theoretical network throughput of a 802.11ah WiFi HaLow network with lets say 300 clients connected to a single AP? The networking overhead is supposed to grow with the number of stations ...
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Internet speed over wifi through walls
I understand that my internet speed over Wi-Fi will deteriorate over distance , especially through walls.
My question is, will speeds drop to a set value, or will it drop as a percentage of the ...
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100Mbit vs 1Gb/sec transferring 10MB file...speed difference?
Two PC's A and B speed of transfer bits across the wire...
100/Mbit Link (100,000,000 bits)
1Gb/s Link (1,000,000,000 bits)
File Size: 10MB (80,000,000 bits)
I'm trying to figure out if we have ...
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Why does the data rate change not instantaneously?
I think this is a simple question, but I could not find a clear explanation for this. When I download a file from a browser, torrent, download a game on steam, or just transfer files from disk to disk,...
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Software Defined Networking (SDN): What is line-speed?
I can't understand what is meant by line-speed. From a networking point of view, we can say that line-speed is the number of packets transmitted in a unit of time.
I got this term from here:
link of ...
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What is the max speed capability of OM2 / 300m?
I am just learning about the outlay of my worksite which has a multi block setup (physical buildings) each connected by their own fibre connection to the main aggregation switch.
I am in the process ...
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Switch with 100Mbit and 1Gbit ports - using its full capacity
There are switches with mixed-speed ports, usually 24x100Mbit + 2xGbit, looking something like this: .
How are these different-speed switches internally connected? The point is, can you use multiple ...
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Why is microwave faster than infrared as a transmission medium?
I've read¹ that microwave is a faster medium of transmission of data than infrared.
But considering that infrared waves have higher frequencies (and a little bigger frequency range too) than microwave,...
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Which protocol enforces a transmission time limit?
I would like to use an internet protocol for communicating with people in which transmissions are necessarily under 0.1 seconds.
Is there any example of a pre-existing internet protocol where, by ...
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What is the difference between server-side and client-side data transfer rates in a speed test?
I am using CNLab's UX desktop app to test my internet connection's consistency as shown below for the upload. What is the difference between server-side and client-side data transfer rates. For VOIP/...
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100 Mbps vs 1 Gbps in a network
I have a network with an older HP 1400-24G un-managed switch. A while back I noticed that backup for a SQL server database took 15 minutes. Using the performance monitor I found the Ethernet ...
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my pfsense is reducing the speed to 40 mbps from 300+ mbps, what can be the issue? [closed]
I have a pfsense system BUSINESS B100 - CELERON DUAL CORE J1800 2.41GHZ 4GB DDR3 SODIMM SSD 60GB HDMI. https://www.amazon.com.br/gp/product/B086M2D8DJ/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&...
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Does UDP's lack of congestion control clog up the Internet?
I'm reading Computer Networking: A Top-Down Approach, and from what I understand, UDP has no widely adopted mechanism for congestion control like TCP does. Isn't this a problem for the Internet as a ...
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Network Cable Flow Rate vs Propagation Speed
I was reading about network Cables then I saw some information that made me feel confused for example :
if we say have a we have copper wire (e.g. Twisted pair) that can achieve a flow rate of 10 Mbps ...
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How does a NIC know how much data to send?
For example, how does a servers NIC know that the client side is running a fibre optic connection and so it can send more packets down the bandwidth?
Like, I'm confused as to how more data comes ...
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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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Can a fast internet connection compensate for a slow server?
If the sever is bottlenecking at 100kB/s with a bandwidth of A, would it bottleneck at any higher speed with a bandwidth of 2A? In another words, can a fast internet connection compensate for a slow ...
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Bandwidth, Latency, Download speed and Upload speed
In the midst of trying to diagnose a slow vpn issue, I'm getting a bit confused by the various metrics being mentioned by the many different techs I've been speaking with.
From what I understand, ...
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Static speed and duplex/no-negotiate causing input error
I noticed gradually increasing input errors for a FastEthernet interface which is connected to an end-user Windows PC.
The default setting for all interfaces is no-negotiate. The Foundry switch will ...
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Speed comparison between agregated and non agregated internet
I have an offer for internet connection, where they offer me these speeds for a symetric and non aggregated connections over fiber optics (upload/download):
10/10 Mbit/s
20/20 Mbit/s
30/30 Mbit/s
...
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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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Connecting a 10 Gig server to a 1 Gig switch
Recently we purchased 5 servers. It has 4 10GB ports + 1 1GB Management port, as follow:
4x 10GB ports per server (2x traffic, 2x ISCSI), and (1x 1GB management port)
However, we are trying to see if ...
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Relationship between full duplex and speed
Full-duplex data transmission means that data can be transmitted in both directions on a signal carrier at the same time. but my question is if we have an interface with 100Mb speed and full-duplex ...
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Actual Network speed for multi port adaptor
I get confused with speed of adaptors having multiple ports.
E.g. chelsio T-520CR is 10Gbits dual port adaptor.
Does this means both ports have 10Gbits speed i.e. effective 20Gbits
or total speed ...
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Bandwidth limit between CPE and Provider Equipment
I have 4 different WAN links for redundancy one of them is 15mbps MPLS and the other ones are 30mbps Internet , 50 mbps Internet and 10 mbps MPLS , the way that it is set up is that we have load ...
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which is faster and why: One big file or split the big file into chunks, then transfer it over the Internet
Let's say I have a file that's 10GB and I want to transfer it over the Internet. Will it be best and fastest if I split the file into many smaller files and send it, then reassemble it after transfer, ...
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OC-1 and OC-3 speeds, really? [closed]
In many cases, I can measure my bandwidth at between 55 and 125 Mbps. Then I see that OC-1 and OC-3 speeds are 55 and 155 Mbps, respectively. Am I to believe that I have an OC-1 or OC-3 level ...
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How can we troubleshoot Wifi problems apart from the basic tips?
We have a Zyxel Wifi with an NXC2500 and two WAC6503D-S access points in our office. Around 30 devices are connected. We have both a 2,4GHz and a 5GHz radio active, both on channels without known ...
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Internet speed across access points
Hi I work for a small plant nursery that is split into two parts by a street. The main side of the nursery has the majority of the green houses. There is a main switch in the office and from there we ...
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Fiber to copper conversion, what are the odds?
My ISP says they bring optical fiber to their junction box outside and they bring the copper cable inside from the junction box. And they're promising a symmetrical bandwidth with a speed upto 50MBps. ...
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Transferring data speed of Fast Ethernet
I am wondering that between 2 hosts in LAN, when i send one file which weights 1Mb versus 1 file weights 0.3Mb from the first host to the second host using TCP/IP protocol, would the latter come first?...
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Confused about the results from the cable tester
A little bit of backstory, just in case you want some context. In the last couple of weeks the network at least internally has slowed down. As far as I can tell the only things that have changed has ...
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What is max speed of WiFi Direct (P2P)?
I'm looking for information on what kind of speeds theoretically can devices connected through WiFI Direct achieve, assuming all devices support WiFi ac?
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Data Transmission Rate Video Stream
Given a web-server with an sd-card (storing 720p (7.2 Mbit/s) videos and 800 Mbit/s read-speed) and a wireless interface with 1200 Mbit/s transmission speed.
I have to know how many clients can ...
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What does the speed of Network Switch actually mean?
Network switches usually come in speeds of 10/100/1000 Mbps, and that's all fine and dandy, then I got thinking..
Suppose I have an 8 port 1000 Mbps switch, each port connected to a client. If a ...
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Will the data transfer with the destination on the same LAN network be routed through the internet when the WAN IP is used?
I'm planning to set up a Nextcloud locally. I will be using my own domain with a DNS record to connect to my WAN IP and port forward the needed ports to the local machine running Nextcloud.
Now of ...
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How ISP limits subscriber speed on GPON/FTTH (GPON Architecture technical question) [closed]
What I mean with my question is: every ISP gives each client a X speed, like 100 Mbps, 400 Mbps, etc. In DOCSIS technology, they can set the speed limit on the ISP Router, so I have no doubts how they ...
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Network switch simultaneous client-to-client speeds?
If I have a 24-port gigabit switch with no uplink, and the odd-numbered downlink clients are transferring data to the even-numbered downlink clients, will I theoretically have (12 x 1 gigabit) ...
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Which component(s) defines the link/connection speed in a network switch?
Suppose that a network switch is a xGbit switch.
Which component(s) defines this speed? Is it the switch core?
Is it possible to decrease the speed to < xGbits? Perhaps by using an adapter? ...
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Cisco 892 Low WAN Speeds [closed]
I'm getting really not-gigabit-close speeds on my Cisco 892 Router. LAN speeds are fine (750-800Mbps) but WAN speeds are awful. I have a PPPoE connection, and when doing a speedtest I get an average-...
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Nokia/Alcatel Lucent SAR-8 7705 port utilization
Typically I use the following command to show port utilization percentage:
monitor port 1/1/8 rate interval 5
As an example, this would result in the following output every few seconds:
============...
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Cisco Router (ISR4221) Throughput - Why so slow?
I'm looking for a new router for a new branch of hour company. I got experience with cisco L2 & L3 Switches but not that much with Routers.
I was looking at the ISR4000 series, specifically the ...
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Different line attenuation figures for broadband upload and download [closed]
I would be interested to know why the line attenuation figures differ so much for upstream and downstream communication when the same copper/fibre cable is being used for the link to my house?
PS ...
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How does router do traffic control?
I googled a lot about this question, but I didn't find anything useful.
If, let's say, the router just drop the packets when the transfer rate exceed the limitation, then there should be TCP ...
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Better throughput with 100 Mb NIC setting
Ran across something very odd today. Just had a symmetrical 100 Mb circuit installed at a site I’m contracting at.
When the NIC is set for auto negotiate for duplex and speed, we only get ~96 Mb down ...
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