Hi, Can you please explain these two statements in Load Balancing section :

1. any busy server in one location can redirect a client to a less busy server in the same cache location
2. inter-tier (or cross data-center) redirections lead a client to a distant cache location because the higher tier caches are only present at a small number of locations

For 1. How can we make sure that the other server in same cache location is not loaded and eventually the request does get served ? For 2. If we are only doing redirection in same cache location, how does point #2 come up ?