DNS Load Balancing

Load balancing is a computer technology for the distribution of requests for information about multiple resources. For example, multiple links to a site or host entry will be served by the distribution of requests across multiple servers with the same content, but is on different IP addresses. Each time an application must be connected to the domain name sends the authoritative nameservers for the domain of all the IP addresses associated with the name of the client orApplicant.

The management is done in a "round robin" fashion. This means that the authoritative name server's IP in order to respond to the client a list of changes, the random order or placement of addresses in a certain order. A client is normally sent a link to the top of the list, and so rearranging the list, the server requests for access to the domain name server finest. In this scheme, the IP addressesare presented in order, which means that the first client request, the IP registration first, the second request, the second record, and so forth to go forward in the list. This is a simple method to implement, but in some cases, is flawed for several reasons. Customers to manage connections through the relocation of a connection attempt with a resource that does not respond to the next resource available, so that in general the connection is ultimately successful.

Load Balancing

The operation of the DNS loadThe balance is pretty simple in practice. In general, there are several so-called "front-end servers", each of which has its own IP address. All servers are then physically connected via a network to the main resource on the "backend". The list of IP addresses is that the list of customers to the Internet, comes a request for access. The IP address is of course the situation on the Internet, where the resource is physically located and easily accessible. The list israndomized data set in order and every customer is trying to establish a connection with the first IP address of the list. If the connection fails, the client tries to make the next IP address, and then the other, and so on.

There are several limitations of DNS load balancing, which prevent its use in some cases. DNS load balancing is not the only method of load distribution. Other methods include direct routing, in which to change the MAC address of incomingPacket data, and Network Address Translation (NAT), load balancing, with the translation of queries through load balancing. Restrictions on the DNS load balancing, above all, to ensure that it is not possible with this method, a uniform distribution of all the receiving server.

DNS management tools can also be used in load balancing. DNS management tools allow you to monitor the IP address to ensure the ready availability of connectivity. There are also DNS management toolsdeveloped in order to identify the MAC addresses of devices using the IP address. These allow the maintenance of the hardware which is very useful in large networks.

DNS Load Balancing