Internet is a global system of interconnected computer networks.

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288
votes
4answers
41k views

Who provides the Internet service to Internet Service Providers (ISPs)?

I've been wondering recently about how the infrastructure of the Internet really works. I know that I have an Internet Service Provider (ISP) that supplies my connection to the Internet. But what ...
179
votes
24answers
9k views

What are some options for transfering large files without using the Internet? [closed]

My employer's Internet connection is extremely slow. It's a $6,000 a month, 9 Mb, bonded T1, shared by over 150 users. It's not untypical to see regular file transfer speeds of 20-100 KBps. And ...
144
votes
7answers
19k views

Why did dialup modems make noise?

I know that the signal was just tone pulses but why was it when (back in the 90s) when you first connected to the internet you heard a bunch of funny noises. After that if you were to use the ...
106
votes
5answers
13k views

How should I choose my DNS?

When I have to choose my DNS I think that I should consider: Speed Reliability Privacy Control (reports and stats) The main options that come to my mind, and how I weigh them according to the ...
104
votes
3answers
11k views

Why are websites suddenly asking me about cookies?

I have for a long time known that websites give me cookies so that small pieces of information can be remembered about my habits, passwords etc. I accept this, but all of a sudden they are asking for ...
77
votes
9answers
14k views

Can you grab any IP address on the Internet?

On a personal network (LAN) one can simply grab an IP address. If you choose the same IP address as an existing client, you get problems. There are companies like IANA and ICANN that are in charge of ...
69
votes
4answers
42k views

What does wwws mean?

I've seen a couple of sites that use wwws in their domain, for example: wwws.mint.com and wwws.whitehouse.gov. I'm sure it has something to do with an extra layer of security. What does it mean and ...
48
votes
4answers
5k views

What is the difference between ftps and sftp? [duplicate]

Trying to set up a system for my 4 remote employees to transfer files. It has to be secure. Is SFTP better than FTPS? What is the difference?
45
votes
3answers
8k views

How do I diagnose not being able to reach a specific website as an end user?

If I can generally reach web pages on the Internet but can't reach a specific one, how do I troubleshoot what the cause is as an end user? This question was a Super User Question of the Week. ...
37
votes
7answers
17k views

What is a external reliable IP address to ping to check if internet is available? [closed]

Is there any common always up server, which I can setup to ping in automatic mode to detect internet is available? Like Google or something? May be 8.8.8.8? My specific situation is that I am using ...
37
votes
4answers
342k views

How can I block a program from accessing the Internet? [duplicate]

I really want to know how can I prevent a program to connect to Internet with Windows 7 firewall? I have smart security nod32 business edition installed on my computer. should i do this job with ...
30
votes
9answers
5k views

Why is the Internet said to be an untrusted network?

From Wikipedia In computer security, a DMZ (sometimes referred to as a perimeter networking) is a physical or logical subnetwork that contains and exposes an organization's external services ...
30
votes
9answers
44k views

How can I get my public IP address from the command line, if I am behind a router?

Is there a way for me to get my public (WAN) IP address on the command line? I am behind a router (LAN network), with a dynamic IP address assigned by my ISP. I have seen solutions using an external ...
29
votes
4answers
16k views

How do CDN (Content Distribution Networks) work?

Taking Akamai as CDN. From what I understand, when a client requests a page, the request goes to Akamai central server, which then depending on the location of client, picks up an Akamai edge server ...
28
votes
10answers
12k views

Application for monitoring all applications that are using the internet in Mac OS X

Can anyone introduce me a Mac OS X application that monitors all network activity such as what applications are now connected to the internet and how much bandwidth they use (I mean show bandwidth ...
28
votes
12answers
124k views

Windows 7 intermittently drops wired Internet/LAN connection

In a nutshell, my Windows 7 Ultimate PC intermittently drops its Internet connection. Why? Background: My PC is wired to my ADSL modem/router which is directly connected to the phone line. I also ...
27
votes
10answers
3k views

Does speed enhancement software actually work? [duplicate]

Here on the Internet, we see many ads promoting software products which can enhance your Internet speed. I wonder, how could this be? Imagine that you are using a 1 Mbps Internet connection, and the ...
27
votes
8answers
20k views

Can my ISP monitor me?

I'm an atheist visiting a islamic republic where the punishmnent for apostacy may be high. Is it possible for an ISP to see the websites I might browse or what kind of blasphemous conversations I ...
26
votes
2answers
851 views

Computer and Internet use on a boat?

Let's assume that I seriously would like to be able to use my computer as easily and as carefreely while on a boat as I do while at home. In short, if I were on a boat for extended periods, such as ...
24
votes
5answers
10k views

Are Domain Name Server and Name Server the same thing?

I am slightly confused between DNS and Name server. Are they the same thing or is there a difference between two?
22
votes
4answers
32k views

How does a hacker in a public WIFI actually view your computer?

I've read that they can see what sites your viewing or even access your computer if you're connected on the same WIFI connection but how exactly?
22
votes
2answers
6k views

How do I check the internet usage of a particular device in my room?

I am living with 5 other people and most of our network is consumed in 20 days so we have to spend almost 10-11 days without Internet. I just wish to know what are the ways to monitor the internet ...
21
votes
8answers
98k 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?
20
votes
11answers
69k views

Generating usage logs that prove my Internet connection is flaky

I need a way to generate reports or logs that prove that my Internet connection is flaky. My Comcast connection is very flaky but if I ask their support to send someone over it will probably work fine ...
19
votes
14answers
3k views

Surfing the web anonymously [closed]

What is the best, fastest, safest way to surf the web anonymously, and how much anonymity can you really achieve?
19
votes
13answers
3k views

How to get past China's Great Firewall and reach blocked sites? [closed]

I wonder if there are any other users who are annoyed like me by the Great Firewall set by the Chinese Government. If so would you please present me an effective way to get on YouTube? Since it's ...
18
votes
3answers
49k views

Can I detect what webserver a website is using?

Is there any program or command that I can use to detect what webserver a website is using? With webserver I mean in software i.e. IIS 6, Apache or nginx.
18
votes
9answers
718 views

What is cloud computing?

I hear about "cloud computing" all the time, but don't know what it is. What is it's purpose? Why do I need it? What problems does it solve? What problems does it create?
18
votes
2answers
4k views

How to obtain a OpenId Identifier from Google

I'm trying to create an account at commandlinefu using OpenId. It's asking for an "OpenId Identifier". I read this article, but it doesn't really show how to actually get the identifier. I looked ...
18
votes
2answers
907 views

How does http://to./ work?

So I noticed this on Jeff's twitter. They don't have a tld, it seems? How've they done this? Magic, bribery, or did a no-tld tld open up recently?
17
votes
8answers
122k views

What's the difference between intranet, extranet and internet?

What's the difference between intranet, extranet and internet?
17
votes
2answers
857 views

If you block all incoming connections, how can you still use the internet?

If your ISP or firewall is blocking all incoming connections, how can web servers still send you data to your browser? You send the request (outgoing) and server sends data (incoming). If you block ...
17
votes
6answers
2k views

Will the ethernet pull bandwidth if unplugged?

I'm fairly certain that this isn't a problem, but like a phone charger it will still pull electricity even though you aren't charging anything if you leave it plugged into the wall. Though minimal it ...
17
votes
7answers
16k views

Is it possible for a router to “go bad” with time?

I've been having problems with my internet connection over the past weeks (intermittent disconnections, slow transfers, etc), and my provider keeps telling me that the problem is not on their end. I ...
16
votes
6answers
5k views

Can I make a video not downloadable? [closed]

I'm a user who has Internet Download Manager and I haven't met any video content that couldn't be downloaded by IDM. Now I would place some videos on my website and make them not downloadable, or at ...
16
votes
21answers
53k views

How can I send super large files directly to another computer in the Internet for free? [closed]

I regulary need to transfer very large files (30 GB) to my friend - financial statistics. I don't have any problem with bandwidth: it is very broad here. I did some research in the area, so: 1. I ...
16
votes
7answers
28k views

Is it possible for many domain names to share one IP address?

Is it possible for many domain names to share one IP address? For example, www.xjtl.com, www.fmie.com, sdmfl.com, etc. Hundreds of domain names share just one IP – when you do a DNS query for each of ...
16
votes
7answers
19k views

What interesting uses for IPv6 are out there? [closed]

IPv6 is reasonably easy to setup these days via 6to4 tunneling, but once done, what does one do with it? What interesting services are out there already using IPv6 or providing exclusive features over ...
16
votes
5answers
29k views

How does Windows 7 decide which route to take if 2 connections to an internet source exist? (e.g. a Wireless and an Ethernet one to a router)

How does Windows 7 decide which route to take if 2 connections to the Internet exist? (e.g. wireless versus wired)
16
votes
1answer
264 views

Getting internet to a protest

I'm not sure if this is the right place to ask this question, but it's been in the back of my head for a while. I am in Turkey, where there are thousands of protestors gathering in the street against ...
15
votes
3answers
45k views

What does the www8 or www6 in a URL mean?

I see some sites with urls such as www8.example.com or www6.example.com, but I don't know what www8 or www6 mean. Does anyone know what this means and if it's different from a URL that just has www?
14
votes
6answers
47k views

How to disable internet access at night on the router?

I have an internet connection that I'd like to be enabled only during the day. With multiple household internet devices, this would need to be something disabled at the level of the router. I don't ...
14
votes
17answers
652 views

How can I make it as difficult as possible to connect to the Internet from my “work computer”?

I can't work. I need to work. But I'm here and on dozens of other sites. I read Paul Graham's essay about "Disconnecting Distractions" and this is actually something I tried before - using my other ...
14
votes
8answers
10k views

If the only browser in Windows is dead, how to connect to the Internet?

Lets say you are running Windows and there is only one browser installed. What if one day this browser dies, would it be still possible to connect to the Internet somehow (to search for the solution ...
14
votes
1answer
588 views

How come sites like Google/Facebook/etc. don't get DDOS'd even though they receive so many requests?

Something I don't understand: (Tens/hundreds of?) thousands of people simultaneously try to connect to a site like facebook.com or google.com. From what I understand, they must all necessarily ...
14
votes
2answers
82k 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
4answers
38k views

How to prevent a file from accessing the internet?

There are some .exe and .dll files belonging to some programs on my laptop which communicate with the internet without my permission (for self-update generally). I want to prevent those files one by ...
14
votes
3answers
11k views

how can I force automatic filling to be enabled on webpages?

I'm using the Chrome Browser. I enjoy the "automatic filling" that it uses to fill in things like my address when I'm shopping online. Sometimes I get a message that says: "This webpage has ...
14
votes
2answers
59k views

How to route internet connection through teamviewer's VPN?

I'm trying to VPN to my home computer using teamviewer. i can connect successfully and can easily see the shared files/folders. But I also want my internet to go through this vpn connection so that I ...
13
votes
4answers
21k views

On Mac OS X how can I monitor what is using my internet connection?

I've got a relatively limited broadband connection (I live miles from the nearest exchange) and from time to time net access (but nothing else) slows to a near crawl. I know from a bit of monitoring ...