Questions tagged [bandwidth]

Bandwidth tag should be used when asking questions about data transfer rates over various data buses or network protocols.

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840
votes
3answers
164k views

Transatlantic ping faster than sending a pixel to the screen?

John Carmack tweeted, I can send an IP packet to Europe faster than I can send a pixel to the screen. How f’d up is that? And if this weren’t John Carmack, I’d file it under “the interwebs being ...
98
votes
5answers
203k views

Way to limit bandwidth of programs on Windows?

Is there a technique in Windows that can selectively limit bandwidth of a running process?
94
votes
8answers
308k views

Is there a good tool for monitoring network activity on Mac OS X? [closed]

Is there a good bit of software on Mac OS X that I can use to monitor incoming and outgoing network activity? Nothing too geeky, I just want something simple to use. I'm on version 10.6 (Snow Leopard)...
79
votes
3answers
910k views

Does moving my router from 20MHz to 40 MHz increase my wireless speed?

I found out that my wireless access point supports dual band (LinkSys E3000), so I went to its settings and changed it from operating on 20MHz to 40MHz. Does this mean I get a faster WiFi connection ...
59
votes
7answers
56k views

How to throttle bandwidth on a Linux network interface?

Is there a way to constrain the bandwidth on a NIC in linux? I'd like to be able to simulate an arbitrarily slow connection.
57
votes
3answers
42k views

Is there a way to find out what application using most of bandwidth in Linux? [closed]

I'm looking for an utility that could show me how much of a bandwidth each process are using. It should just print the data and exit as I want to feed that list into conky.
51
votes
4answers
9k views

What is the actual speed of SATA 3?

Google says it is running at 6Gb/s. The throughput is at 600MB/s. 600MB/s equals 4.8Gb/s. Does this mean that the bandwidth is 6Gb/s but the actual throughput is 4.8Gb/s ?
46
votes
2answers
38k views

Make rsync use less bandwidth?

I use rsync to backup and synchronize network shares and my computer. I have this figured out. The problem is, when using rsync to transfer files, it uses all the bandwidth it can. I want to cap it's ...
46
votes
5answers
235k views

Microsoft Remote Desktop Bandwidth Usage

I am wondering how much bandwidth in terms of bytes sent/received is consumed by a typical remote desktop session. I need to know this because our ISP enforces a cap on monthly bandwidth usage (i.e. ...
32
votes
4answers
53k views

Using multiple USB webcams in Linux

Running more than one USB webcam in Debian/Linux results in the the following error: libv4l2: error turning on stream: No space left on device VIDIOC_STREAMON: No space left on device What initially ...
31
votes
11answers
165k views

How can I monitor internet usage in my network?

I need to know which computer is consuming my bandwidth. Is there a tool to do this?
31
votes
3answers
63k views

How to track internet usage (upload & download) on Linux?

I use a broadband modem to connect to internet on my linux machine. I've used the gnome-system-monitor app that correctly displays the kbps as well as total bytes consumed in each session. Now, is ...
29
votes
4answers
139k views

How much bandwith is required to stream 1080p?

I am wondering how much bandwith is required to stream a 1080p movie from for example Youtube. I am aware that there may be things such as compression that come in play here, but can anyone provide a ...
27
votes
7answers
89k views

Do cabled connections and Wi-Fi “use” the same bandwidth?

My brother likes to play games online on his Xbox. However, because he is far away from the router, he uses our Wi-Fi instead of an Ethernet cable. I, being closer to the router, use an Ethernet cable ...
26
votes
3answers
162k views

How to monitor bandwidth use of each device on wifi network

I have in my home a standard Comcast cable internet connection. I have it going from the wall to a cable modem, and from the modem to a late-series Linksys router, which provides wired and wireless ...
24
votes
3answers
59k views

Logging individual application network usage in Windows 7 [closed]

There are many answers here detailing programs that will monitor and log internet usage for a pc, but I need that usage to be logged and broken down, detailing which applications consumed that data. ...
24
votes
1answer
10k views

How can I prioritise network bandwidth on a per application basis?

Is there a way in Linux to give a specific application more/less priority for network bandwidth? Something like how nice does for CPU priority. Context: I'm currently on a very low bandwidth ...
21
votes
1answer
35k views

Limit bandwidth used by Windows Update

I have a Windows 8 (64-bit, not Pro) machine, and I want to limit the Internet bandwidth available to Windows Update. I read about BITS and GPMC methods, but I don't know how to open the BITS window, ...
21
votes
8answers
6k views

Why upload rates are lower than download rates in normal internet connections?

I have used dial-up and/or broadband services from many service providers (in India) and one thing I noted is that the upload bandwidth is lower than the download bandwidth. Is there any reason for ...
21
votes
4answers
21k views

If I have two internet connections on osx, how can I use both to increase my bandwidth?

I understand that any one connection (such as a non-p2p download) will use just one of the connections, but since most normal activity involves multiple connections at once, I can still in theory ...
18
votes
4answers
9k views

When doubling Internet connection speed, will my effective in-house bandwidth also double?

So I'm thinking of increasing my Internet connection by 40 Mbit/s, also doubling it. This is because in the furthest corners in my apartment I have 1 Mbit/s. So when I increase will I get 41&...
18
votes
1answer
26k views

What's the difference between GPU Memory bandwidth and speed?

I was looking at Nvidia's series 10 graphics cards' specs and noticed they have memory speed and memory bandwidth specified. Memory speed is expressed in Gbps and memory bandwidth is expressed in GB/...
18
votes
4answers
20k views

How do I set up a proxy server for home with bandwidth control, download limit options?

3 room mates share a single 2 Mbps connection. Have a 40GB per month download limit beyond which speed drops to 256Kbps which is annoying. One of the roommates abuses the connection by downloading ...
16
votes
6answers
36k views

Does increasing upload or download speed reduce ping?

I have a 5 MB/s connection, but I always notice high ping when playing online games. When the network is stable (i.e. when pingtest.com reports the connection as 5 MB/s), the ping stays at 50 ms, but ...
16
votes
1answer
22k views

Measure bandwidth between two computer in a LAN

Is there any way to measure precisely bandwidth between two computers in a LAN?
15
votes
9answers
111k views

Netflix streaming: how much bandwidth does it use?

Title more or less says the question. I'm thinking about getting netflix, but want to make sure that our connect is fast enough to watch movies streamed. So: what is the bandwidth used by netflix, ...
15
votes
2answers
91k views

How do I measure how much bandwidth Internet Radio hogs?

I was thinking about logging into Pandora at work like I do at home, but I'm concerned about sucking up all of the available bandwidth on the network with something that's not strictly work-related. I ...
14
votes
6answers
103k views

Is it possible to use HDMI cable to transfer files between notebooks?

HDMI 1.3 bandwidth is over 10G. Notebook nowadays has HDMI port available. Is that possible that we use HDMI cable to hook up 2 notebook and perform file copy operation?
14
votes
4answers
46k views

Can I use a pci-e x16 slot for multple cards?

I have a mini itx pc with only one pci-e x16 slot. There is another old style pci slot. I don't care that much about graphics bandwidth and I'd like to add USB 3.0 support. It's a waste to be using ...
13
votes
4answers
8k views

How can I throttle the bandwidth consumed by Windows Automatic Updates?

We have many Windows XP computers sharing one connection to the internet. These machines are set to download all available automatic updates and then prompt the user to install them. Whenever Patch ...
13
votes
3answers
32k views

How to get current bandwidth usage from command line using built-in Linux tools?

I'm looking for a good way to get the current total bandwidth usage on a linux machine. I’ve tried iftop, nethogs, but they don’t show real bandwidth usage compared to system monitor; they don’t suit ...
13
votes
3answers
11k views

Options for bandwidth management on a shared internet connection

The premise: Rural location, not many options for high-bandwidth internet connections. The fastest by far is Satellite internet, but it's expensive (both equipment and monthly cost, and has latency ...
13
votes
4answers
5k views

Monitoring Bandwidth Across Multiple Systems in a Home Network

For the past several years, I have been using a simple software bandwidth monitor on my computer to keep track of my monthly bandwidth usage. It has worked fine (more or less; the numbers are slightly ...
12
votes
1answer
15k views

How Many Concurrent TCP Connections Does An Average Internet User Consume?

I'm about to buy a router for a location where there are usually 10~20 guests using their laptops/smartphones/tablets for connecting to the Internet. My router of choice has a cheaper variant that ...
11
votes
4answers
12k views

How do determine how much bandwidth a process is using in Linux

On occasion I see my bandwidth usage using gnome-system-monitor going up to 300kbit/s. I just can't figure out what is causing it. I want to know what process or program in using my network like that? ...
11
votes
4answers
10k views

Limit Chrome's bandwidth

For web development purposes, I want to be able to throttle the bandwidth Chrome uses, especially for localhost connections. I know that the add-on "Firefox Throttle" does that in Firefox; is there a ...
11
votes
1answer
14k views

Maximum Bandwidth through gigabit switch

This seems like a simple question, but I can't find a definitive answer for it. I have four devices connected to a Gigabit switch as in this diagram: Can I get the full GBit bandwidth from A-B ...
10
votes
4answers
18k views

Is it possible to rate-limit an scp/sftp/rsync/etc transfer from the command-line? ie, manual QoS on a single command?

Specifically, I am looking to rate-limit an scp or sftp session (or other arbitrary network call) in the call itself. For example, let's say I want to copy 100MB to one server, and 1GB to another. I'...
10
votes
2answers
139k views

Why is my actual download speed less than that found by by speedtest.net?

I ran my Internet connection through SpeedTest.net which claims that it finds out the actual Internet speed, much lower than that promised by my ISP. But—while downloading—the speed is much lesser ...
9
votes
8answers
12k views

Bandwidth monitor for Mac OS X?

This is similar to the question: Does software exist to log all download / upload usage? But, I want to know what options are out there for OS X? This includes Dashboard widgets and standard ...
9
votes
3answers
9k views

Is SATA bandwith per Port or per Controller?

I always assumed that it was per Controller channel, and that If I have 4xSATA 3.0Gb/s ports on my Motherboard then I should have a potential 12.0Gb/s of bandwidth. However, after doing some searching ...
8
votes
8answers
40k views

What is eating up all my bandwidth?

After upgrading my internet connection from 512kb/s to 1.5Mb/s (and 14GB on-peek/month to 20GB on-peek/month), our download usage has gone through the roof. I have made special effort to be careful ...
8
votes
2answers
29k views

Which one VoIP SIP audio codec should I choose to high quality calls?

The quality of VoIP calls depends on the codec used for the transmission and on the bandwidth of Internet connection. I want to use best optimized codec for my Internet connection. I have to select ...
8
votes
2answers
6k views

Application bandwidth monitor

Which is the best application bandwidth monitor for my windows machine? Some programs lurking in the background seems to pull up all the bandwidth and constraints my browsing experience. Are there ...
8
votes
2answers
11k views

What can I use to measure the bandwidth a specific Windows application uses?

Ideally, I'd like to hear of an application to show how much bandwidth each application is consuming on my local Windows PC. Alternatively, instructions to use any other application for this purpose. ...
8
votes
5answers
4k views

Are there any wireless routers that allow bandwidth monitoring and throttling?

Are there any wireless routers that would allow me to see what clients are hogging up bandwidth and that would let me limit them so that they can't grab it all? Both wifi-wise and internet-wise. I ...
8
votes
3answers
9k views

Skype Bandwidth Usage

I am wondering if anyone can tell me the average bandwidth usage for a Skype to Skype call (PC to PC) per hour (voice only), as well as calls that would include screen sharing. I have tried searching ...
8
votes
3answers
6k views

Increasing network speed on low bandwidth

I'm struggling with the following issue: Given a computer with low-medium CPU/RAM capabilities, and an extremely poor network connection. Poor means here 10-15 kb/s. I would like to do something to ...
8
votes
2answers
625 views

Is it possible to tell windows 10 to not take all the available bandwith when downloading updates?

Windows 10 updates itself pretty often, and usually it takes all of my bandwidth, I can hardly browse the internet or watch youtube. Usually common programs are able to share bandwidth, but here ...
7
votes
5answers
8k views

Is there a way to find out what app is using most of my bandwidth in windows

I have found several that measures total bandwidth but none that tells me bandwidth per application. Preferably with some history or logging. I'm using Windows Server 2008 R2

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