When you have a load balancer on your web server, you can truly increase the capacity of your server. Having a load balancer on your server also can allow your web service to continue even when you perform maintenance on your server or when the server fails to continue operating.

When you have a load balance, you’ve installed a VIP or a virtual server, which contains an IP address and a port. If you have a load balancer installed, you can have more security for your website, as your data is more even distributed. If your web service fails to operate, your web service will continue operating. Even if you perform maintenance on your system, which is typically a time when data or service is lost, the load balancer will help keep your web service running effectively.

Firewall ISP Load Balancing
Your load balancing will help your DNS server to operate more effectively. If you have a single IP address that’s mapped to a particular site name, you will have efficient operation. The load balancing server will load using a DNS, while the DNS server maintains several different IP addresses for the name of the site. The multiple IP addresses will show different machines in your cluster. This cluster can be mapped to one logical site name. In return, this cluster can be hosted on different machines in one cluster with a similar IP address.

Algorithm For Load Balancing
When using load balancing techniques, your first request will arrive at the DNS server and will return a particular IP address. The second request will return a second IP address and so on and so forth. By using load balancing and the DNS, each of the sites requests have been evenly distributed between all of your server machines in the cluster. This keeps your load balanced and all the parts of the cluster are exposed to the internet.

Load balancing can be done inexpensively and easily. Your system administrator just needs to make a few simple changes to your DNS server. Then your code changes can be made to your web application. It is doubtful that your web applications will even notice that there’s a load balancing going on. Load balancing can be an effective way to keep your web site evenly running even when you’re working on servers or if there’s a power failure or other event that typically would prevent your web site from operating.