there are 2 ways to block internet sites.
1. host.cfg
In "Local Disk (C:) > WINDOWS > system32> drivers > etc", you will find a file named "host.cfg". The Hosts file contains the mappings of IP addresses to host names. This file is loaded into memory (cache) at startup, then Windows checks the Hosts file before it queries any DNS servers, which enables it to override addresses in the DNS. This prevents access to the listed sites by redirecting any connection attempts back to the local (your) machine.
You may use "notepad.exe" to edit this Hosts file.
Example - the following entry 127.0.0.1 ad.doubleclick.net blocks all files supplied by that DoubleClick Server to the web page you are viewing.
4. Internet filtering products
You also can use internet filtering products to do web filtering. An internet filtering product can be deployed in your network, and it enables you to monitor, filter and block internet activities of all computers from a mirroring port.
More than web filtering, internet filtering product can also block file downloading, block p2p traffic and block messenger.
For internet filtering software, you can try "Aobo web filter"
They block websites that would not be beneficial to their educational curriculum.
Schools block proxy websites because they do not want students to go on uneducational websites
Many different websites can be blocked. Often employers will block all websites that are not pertinent to the employees job. Parents often block websites that contain pornography and violence.
you can download software
YES
200%
You cannot block websites via Google Chrome internal's browsers. You can only do it by 3rd party apps in web store.
not really
to block bad and sexual websites.
there is kinda software like WFilter,you just need to set the keywords then you can block the websites which URL include the keywords.
I'm not exactly sure what your question is but in the US schools have the right to block any websites that they choose to block.
Pillow block bearings can be found online at a lot of websites for sale. A few of the websites where one could buy pillow block bearings include eBay, Amazon, and Lowe's.