This page provides an overview of the number of IP addresses used in every country of the world. The numbers are generated from information published by the Regional Internet Registries (AfriNIC, APNIC, ARIN,LACNIC and RIPE NCC) published on their FTP servers. This information is retrieved at least once a week.

Total number of IPv4 addresses:

2^32:           4294967296      4294.97 million
Class D+E:       536870912 -     536.87 million -
Nets 0 and 127:   33554432 -      33.55 million -
RFC 19...

Before diving into the security aspects of cloud computing, let us first understand the basic concept of cloud computing. In cloud computing, cloud stands for internet and computing means using computer technology, hardware, and software, i.e. using or sharing the computer technology, hardware and software over the internet. Different cloud service models are as follows:

Every time I open a new tab in Firefox, I'm greeted with about:blank.  As far as creative names go, the name of this page is not very creative because it is just that - blank:

There are many reason why you need to know how to block a website. Some of the most common reasons are you have been targeted by spammers who use adware and popups to attack your PC. Other reasons may be to prevent your children from having access to certain site content such as porn and gambling.

Depending on the level of security you wish, learning how to block a website may require a adjustments of your web browser, the use of internet filtering software or editing of your host file. At any...