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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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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 ...
Aard's user avatar
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1 vote
2 answers
95 views

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 ...
Divan's user avatar
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0 votes
1 answer
69 views

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 ...
Nick's user avatar
  • 101
0 votes
1 answer
132 views

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) ...
Riccardo's user avatar
  • 163
1 vote
0 answers
80 views

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 ...
Kozuch's user avatar
  • 121
1 vote
1 answer
79 views

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 ...
Crudler's user avatar
  • 113
0 votes
2 answers
2k views

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 ...
JoelP's user avatar
  • 29
0 votes
1 answer
66 views

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,...
RoyalGoose's user avatar
0 votes
1 answer
45 views

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 ...
user2994783's user avatar
2 votes
1 answer
181 views

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 ...
jwknz's user avatar
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0 votes
1 answer
174 views

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 ...
jaromiru's user avatar
3 votes
4 answers
3k views

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,...
Balu's user avatar
  • 33
2 votes
2 answers
61 views

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 ...
Julius Hamilton's user avatar
0 votes
1 answer
110 views

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/...
Martin's user avatar
  • 103
2 votes
3 answers
478 views

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 ...
René Heuven's user avatar
1 vote
0 answers
222 views

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&...
Tom's user avatar
  • 111
1 vote
1 answer
271 views

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 ...
fpsvogel's user avatar
  • 113
0 votes
2 answers
51 views

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 ...
Colin Jack's user avatar
1 vote
3 answers
276 views

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 ...
Hydra17's user avatar
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0 votes
1 answer
68 views

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 ...
Elliot B.'s user avatar
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0 votes
2 answers
57 views

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 ...
Tripasect's user avatar
  • 103
1 vote
2 answers
885 views

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, ...
Silfheed's user avatar
  • 111
2 votes
2 answers
1k views

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 ...
iridescent's user avatar
0 votes
2 answers
36 views

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 ...
mrrobot's user avatar
1 vote
2 answers
621 views

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 ...
RedNebula's user avatar
0 votes
1 answer
4k views

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 ...
Roham's user avatar
  • 1
2 votes
2 answers
789 views

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 ...
guidev's user avatar
  • 563
2 votes
1 answer
95 views

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 ...
Vinit Agnihotri's user avatar
0 votes
1 answer
182 views

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 ...
Kejimire's user avatar
0 votes
3 answers
3k views

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, ...
pattalol's user avatar
0 votes
1 answer
105 views

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 ...
CharlieBucket's user avatar
0 votes
4 answers
211 views

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 ...
GxB's user avatar
  • 101
4 votes
1 answer
95 views

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 ...
Miguel Guerrero's user avatar
2 votes
2 answers
3k views

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. ...
iamgr007's user avatar
  • 123
2 votes
2 answers
582 views

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?...
KenNG's user avatar
  • 21
1 vote
2 answers
5k views

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 ...
Eddy's user avatar
  • 13
2 votes
1 answer
976 views

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?
kar's user avatar
  • 71
-2 votes
2 answers
78 views

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 ...
toofun's user avatar
  • 1
1 vote
1 answer
263 views

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 ...
James Mueller's user avatar
4 votes
1 answer
378 views

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 ...
Umizoomi's user avatar
1 vote
1 answer
6k views

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 ...
John's user avatar
  • 83
2 votes
2 answers
87 views

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) ...
Drakes's user avatar
  • 123
1 vote
2 answers
96 views

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? ...
nFu9DT's user avatar
  • 345
0 votes
1 answer
371 views

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-...
vscorpio's user avatar
1 vote
1 answer
2k views

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: ============...
mkitchen's user avatar
6 votes
2 answers
6k views

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 ...
Geo's user avatar
  • 63
0 votes
2 answers
887 views

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 ...
Farcher's user avatar
  • 103
2 votes
1 answer
485 views

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 ...
ryuu's user avatar
  • 55
5 votes
2 answers
81 views

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 ...
TheValyreanGroup's user avatar
1 vote
1 answer
664 views

Fibre vs Copper short Distance

I am thinking of running Fibre optic from one room to a Nearby ONT/Router, I currently have about 15-20 meters of Cat 6, With a Gigabit UFB internet plan. With a short distance of around 20 meters ...
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