A CallManager cluster topology of Cisco MCS 7835s (each capable of supporting 2500 calls) is being designed for an IP telephony network.
The design must accomplish the following:
1. support up to 6,5000 phones
2. provide a minimal level of redundancy
3. be cost effective
Select the best configuration that requires the fewest number of CallManagers while still providing acceptable performance.
A.
Three: Combined Publisher and TFTP server, and Two Primaries
B.
Five: Publisher, TFTP server, and three Primaries
C.
Seven: Publisher, TFTP server, three Primaries, and two Secondary’s (each covering two Primaries)
D.
Eight: Publisher, TFTP server, three Primaries, and three Secondary’s (one for each Primary)
E.
Nine: Publisher, TFTP server, three Primaries, three Secondary’s (each covering one Primary), and one Tertiary