Which of the following factors should be considered when evaluating a firewall to protect a datacenter’s east-west traffic?
A. Replication traffic between an on-premises server and a remote backup facility
B. Traffic between VMs running on different hosts
C. Concurrent connections generated by Internet DDoS attacks
D. VPN traffic from remote offices to the datacenter’s VMs
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Correct answer would be “B”.
https://www.techtarget.com/searchnetworking/definition/east-west-traffic
East-west traffic, in a networking context, is the transfer of data packets from server to server within a data center. The term east-west for this type of traffic comes from network diagram drawings that usually depict local area network (LAN) traffic horizontally. In contrast, north-south traffic describes client-to-server traffic that moves between the data center and a location outside of the data center network. North-south traffic is typically depicted vertically to illustrate traffic that flows above or below the data center.
In the past few years, the volume of east-west traffic has grown as a result of virtualization and data center trends such as converged infrastructure. Today, network controllers, virtual machines (VMs) and other devices perform various functions and services that previously ran on physical hardware.