How Does a 404 Error Occur?In Feburary 2016 12,

In Feburary 2016 12,
A '404 Error' appears when a person trying to get to a website or URL but the site is unavailable or unreachable. This error may also manifest in different appearances on the web page, depending on the way the website administrator programs the error to appear to the users. Aside from 'Page cannot be displayed,' it can also appear as 'Page cannot be displayed,' '404-Page not Found,' 'Error 404: Not Found,' 'The page cannot be found' or 'HTTP 404- Not Found.' Aside from the error messages, the error page may have additional information indicating the possible cause and resolution.
Causes
There are different reasons why a website becomes unreachable or unavailable, possibly due to a problem on the web server hosting the website or a possible problem with the link or URL. Another possibility would be a network connection issue between the web server and the user's computer. It is also possible that certain components within the web server that is hosting the site is having issues, such as services and web instances not running that the website is depending on to run normally.
Troubleshooting
The common resolution suggested by technical support or programmers would be to do the simplest thing, often suggested on the error page itself, which is to refresh the screen by hitting the refresh button on the web browser menu bar. This will allow the web browser to try to reconnect to the website that is having issues. Oftentimes, companies that host websites have redundant servers in place to provide minimal disruptions, after hitting refresh the other server or servers in the pool will process the request in order to display the website. Another way to solve the 404 Error code is to make sure that the website spelling is correct. The cause may be a typing error by misspelling or missing letters or symbols. By typing the correct URL or link to the website, the error code will disappear and will lead to the correct web page. Sometimes, if the error does not go away, it is best to wait patiently until the problem disappears. This is often the case when a web site may be experiencing technical difficulties and a user has no control over the situation. Most reputable webhosting companies already know the problem before the users do; therefore, they may already be hard at work to resolve the problem. If the wait is taking much longer as anticipated, it is best to call the webmaster or webhosting services to report the problem or find out the status of the problem. Technicians supporting the websites may need to restart services, recycle web instances or reboot the web server to resolve the problem. If the website is corrupt or it needs the programmer to rebuild it again may take several hours to resolve. If the web server is broken, support technicians may need to repair or replace the broken parts or replace the entire server with another one. It is best practice for webhosting companies operate with redundant pairs in order to minimize disruption of service or to provide uninterrupted service. If the problem is due to network connectivity, support technicians will have to fix the network connections first before the website can come back up.
In Feburary 2016 12,

How to Make My Own Web ServerIn Feburary 2016 12,

In Feburary 2016 12,
If you don't have a high-speed Internet connection, secure one with a local provider in your area.
Secure your own domain name. This will help people get to and from your files on the Internet. This will also give you a place to send and receive email. If you do not have a static web address (if you have cable or DSL connection, you probably will not have a static address) there are several places you can go to secure your domain. Check the resources section.
Get your router. Use a regular router, because wireless routers are not suggested for home server set-ups. Your router should have Ethernet jacks and should be capable of port forwarding in order to allow outside Internet traffic.
Set up your computer. Make sure that you have your standard computer items including a keyboard, mouse, and a 10/100 Ethernet Network Card. Make sure to have an uninterrupted power supply to keep your system safe in the event of a power outage.
To configure your web server, you should start system-config services. Make sure that httpd and mysqld are started and selected to start on boot, then save the service configuration.
Verify that your web server is working correctly by opening a browser and pointing it at http://localhost/ (which always points to the web server on your computer). You should see the test page for apache, the web server application.
Set up port forwarding as directed by your router. Make sure that all http services or port 80 traffic is sent to the IP address of your web server.
In Feburary 2016 12,