A network administrator is investigating a performance issue on a dual-link connection — VPN and MPLS — to
a partner network. The MPLS is the primary path, and the VPN is used as a backup. While communicating, the
delay is measured at 18ms, which is higher than the 6ms expected when the MPLS link is operational but lower
than the 30ms expected for the VPN connection. Which of the following will MOST likely point to the root cause
of the issue?


A. Checking the routing tables on both sides to ensure there is no asymmetric routing
B. Checking on the partner network for a missing route pointing to the VPN connection
C. Running iPerf on both sides to confirm the delay that is measured is accurate
D. Checking for an incorrect VLAN assignment affecting the MPLS traffic