One of the most common terms in web hosting technology is IP addresses. Basically, there are two types of IP addresses – static and shared. It is essential to understand the meaning of the term IP first.
When someone types in the address: www.yourdomain.com, that name is converted into numbers and then the computer is directed to that IP address which is the web site. Every website on the internet is found by its IP address and not the domain name.
The format of IP addresses is similar to 192.168.0.1, being four discreet blocks separated by periods. Type the IP address and you will be able to find the website directly.
Remember that every single website doesn’t have an IP address allocated to it specifically. For example: each site on the server does not use different IP addresses. If this were the case, there could potentially be a problem with running out of IP addresses.
A lot of sites on the servers on the internet use one IP address for multiple sites. So you may see two different websites using the same IP address. This also frees up IP address which are a limited resource. When one website is resolved into the IP address, the person looking for that website is sent a page of the site to fulfill their request. Using more than one site on an IP address is called sharing IPs or a shared IP address in web hosting.
If a site has its own IP address and shares with no one else, it is called a static IP address in web hosting. A site with static IP address can always be reached by using its IP address alone but this is not the case for websites with shared IP address because you will reach the server instead of the desired website.
The main reason for taking a static IP address is that you can use SSL encryption on these. In order to transmit sensitive data over the internet, it must be encrypted to avoid someone from intercepting the information. Such system of encryption will not work on websites with shared IP address. Another factor for having static IP address is handling of anonymous FTP transfers.
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