ARM DS-5- Configuring the Remote System Explorer

In the tutorial video ARM DS-5- Configuring the Remote System Explorer (http://www.youtube.com/watch?v=3UxUwRoc03k) What should be filled in the host name of new connection? What are the prerequisites ( other than ARM DS-5, ARM BOARD, DSTREAM). Please specify. What are the applications of  ARM DS-5- Configuring the Remote System Explorer meaning what can we do with it further? Please specify.