Free CompTIA Network+ N10-009 Practice Question

North-south traffic flow is the correct answer because it specifically refers to the movements of data between the data center and traditional client applications, typically located outside the data center, such as users' personal devices or company workstations. East-west traffic flow, on the other hand, describes the movements horizontally, such as between servers within a data center which does not fit the scenario of server to client machine described in the question. Peripheral traffic and radial traffic are not recognized types related to specific data flow in network design, and are included to test the knowledge depth.