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Questions tagged [network-speed]

158 questions
49
votes
9 answers

How fast is 127.0.0.1?

I wonder if it is tied to my NIC at all or if the OS or driver intercepts and immediately returns data sent to the loopback address? Does the signal actually travel to my NIC then the NIC returns it?
user55029
30
votes
4 answers

Our wi-fi at work is ridiculously slow, will adding more range extenders improve it?

At work, we have two wireless networks (e.g., Work1 Work2); the Work2 is used downstairs and Work1 is used upstairs. However, both are notoriously slow. The connection is better when we are wired in, but unfortunately due to our building being very…
john
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6 answers

Why the discrepancy between Speedtest and Wget?

My customer complains about low internet speeds. When measured with Speedtest.net speeds are acceptable. Periodic measured downloads are 10% to 30% of the nominal speed. I cannot explain that. Some background. The problematic connection is on one of…
Johannes Linkels
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18
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3 answers

Troubleshooting Network Speeds -- The Age Old Inquiry

I'm looking for help with what I'm sure is an age old question. I've found myself in a situation of yearning to understand network throughput more clearly, but I can't seem to find information that makes it "click" We have a few servers distributed…
Univ426
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16
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12 answers

Will a higher bandwidth Internet connection lower ping response time?

It sounds obvious that a faster connection lowers latency... But I wonder: I am working remotely on a host the other side of the world - light can only travel so fast (1 foot in a nano second) and we both have broadband connections in excess of…
user55029
10
votes
1 answer

Debugging slow transfer rate from server

I'm trying to explain this as simple but documented as possible. This is not exclusive to this server or my current ISP. I've seen the same exact issue over the years while being with different ISPs and having my servers with different providers…
Francisco Zarabozo
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8
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2 answers

What type of hardware is required for a Gigabit connection?

Just in case the question I am asking is unclear or hard to understand, I am basically asking whether or not the type of hardware in a machine (such as a router or server) matters when using a gigabit connection. It is already known that you will…
joeldesante
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8
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1 answer

SSH keys: ed25519 vs RSA performance demystified

It is claimed that ed25519 keys are better than RSA, in terms of security and performance. In terms of security, I understand that 4096 bits RSA keys are practically unbreakable for the foreseable future, so I am not asking about that. What I would…
a06e
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6
votes
2 answers

AWS - how to serve faster to oversea users

We have our infras relying on AWS in the us-east-1 region. (EC2, CloudFront, RDS, ElastiCache) We are now having more and more users from the APAC. Users start to complain about network speed to our website. (please note we are already using…
Chris Lam
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5
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3 answers

Why is scp much slower than http?

I have an instance on Amazon EC2 which holds a large-ish file (~180MB). I need to copy that file to my local machine, so naturally I tried scp. After trying multiple times only to get max speeds of 20-30kb/s and dropped connections (only once did I…
Felix
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4
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0 answers

Not sure I really get 10 Gbit between our servers on the 10 Gbit network

We have a 3 Unix (1 Ubuntu 2 Redhat) servers connected via their 10 Gbit network cards to a 10 Gbit switch (our IT person made sure we got the correct cables). We experience some odd behaviour when sending files between the servers (either via scp…
Robin
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4
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5 answers

How to throttle your own internet connection?

I am writing a website and want to test its speed on slower internet connections. I have the unfortunate first world problem of downloading at 100mbps, how can I throttle my own computer's internet connection to 56kbps or 5mbps to give myself an…
darkAsPitch
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4
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2 answers

Does Gigabit degrade all ports to 100 megabit if there is a 100 megabit device attached?

Our company is buying some HP Procurve managed gigabit switches to replace some of our core switches. However, we aren't able to upgrade all of our switches from 100Mb to Gigabit switches. I think I know the answer but I'm not exactly sure. If we…
goodman
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4
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4 answers

Why do some VPN clients slow down the network connection even when they are not it use?

I work as an I.T. consultant, and I often have to install various VPN clients on my computer in order to connect to customer's networks; beginning in March 2020, I started always working from home for well known reasons. Until a couple months ago I…
Massimo
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3
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2 answers

FTP transfers slow on a long fat pipe

We've recently gotten new internet - 100Mb/s fibre - and have been complaining bitterly to our new ISP about transfer speeds to some FTP servers in the USA (300ms away). To one server in particular, we were getting only 1Mb/s. After they assured us…
Steven Hook
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