If it happens that there are many documents available, there is usually an original one which redirects to others as given to reference inside it. Connection to the server is not necessary if replica documents happen to be created. It is very easy to deploy and efficient as well. If the document cannot be reached, then it has no alternative.
In TCP Handoff redirecting, an Internet Protocol is developed between two machines that are communicating directly. The data is divided into portions known as segments and it is the computer that will send it that assembles all the data. Segments are sometimes made to look as if they are coming from a different machine.
The TCP connection is serviced to the right replica document as per the settings of the mechanism. The gateway is the one responsible for ensuring that this actually happens when a client gives the green light by clicking on the link. Setting up such a system is hard work and requires a dedicated network structure.
The Domain Name System works by translation of network IP addresses into respective machine names and vice versa. Name resolution is specifically necessary for this to happen and there are DNS servers all around the world. Queries are resolved either by iterative or recursive methods.
The method is transparent and easy to monitor. The maintenance is even made possible on a small scale and gives many replica addresses that a client can choose one from. It is the most preferred method among the 3 redirection mechanisms but usually has a problem distinguishing services available on the same computer.