An important component of global load balancing traffic is to determine which POP1should handle an incoming connection. There are many criteria that can be taken into account including: Relative Capacity of different POPs; Relative Load of different POPs; Latency between POPs and client; Network distance between POPs and client.
It is important that when a new connection is received, allocating the connection to the apropiate POP is done quickly. A long and involved process to determine which POP to allocate a connection to will, at best, cause the connection establishment time for the client to be slow. At worst the client may time-out.