An administrator is troubleshooting network communications between the vCenter Server and the ESXi 6.x
host.
Which log shows the interaction events between these components?

A.
/var/log/syslog.log

B.
/var/log/hostd.log

C.
/var/log/vpxa.log

D.
/var/log/fdm.log

Explanation:

When an ESXi 5.1 / 5.5 host is managed by vCenter Server 5.1 and 5.5, two components are installed, each with its own logs:
/var/log/vpxa.log: vCenter Server vpxa agent logs, including communication with vCenter Server and the
Host Management hostd agent.
/var/log/fdm.log: vSphere High Availability logs, produced by the fdm service.
Reference: http://kb.vmware.com/selfservice/microsites/search.do?
language=en_US&cmd=displayKC&externalId=2032076