A real estate agent is uploading photos of the latest listing onto the corporate website. Once the agent uploads the photos, they pass through multiple servers undergoing quality checks and sorting to ensure that they appear in the most relevant searches. What term best describes the passing of data from server to server?

A$.$East$-$West

B$.$North$-$South

C$.$Branch office vs$.$ on$-$premises datacenter vs$.$ colocation

D$.$Top$-$of$-$rack switching