You are planning to build a new SAN network that will have 25 4-Gbps host ports and two 8-Gbps storage uplink ports. Which option is the oversubscription ratio on a Cisco MDS switch?

A 7:1 ratio would imply a host bandwidth of 112 Gbps (7 * 16 Gbps), which is not accurate based on the provided port speeds.

The total bandwidth from host ports is 25 ports * 4 Gbps/port = 100 Gbps. The total bandwidth from storage uplink ports is 2 ports * 8 Gbps/port = 16 Gbps. The oversubscription ratio is calculated as total host bandwidth divided by total uplink bandwidth, which is 100 Gbps / 16 Gbps = 6.25:1. Therefore, 6:1 is the closest and most appropriate option.

A 10:3 ratio (approximately 3.33:1) is significantly lower than the calculated oversubscription, indicating an incorrect calculation.

A 5:3 ratio (approximately 1.67:1) represents a much lower oversubscription than what is calculated from the given port speeds.

A 4:1 ratio would imply a host bandwidth of 64 Gbps (4 * 16 Gbps), which does not match the sum of the host port bandwidth.