A user attempts a remote SSH connection to a newly installed ESXi 5.x host to execute some commands. The SSH connection attempts fails, through the user is able to receive a ICMP ping back from the host. Which two connections might cause the issue? (Choose two)

A.
The shell timeout is set too low.

B.
The ParentRootLogin option is set to False.

C.
The SSH service is disabled on the host by default.

D.
The ESXi firewall blocks the SSH protocol by default.

Explanation:
Option A is incorrect:
Shell Timeout is disabled by default.

Option B is incorrect:
The paremeter "ParentRootLogin" is only used in ESX no in ESXi

Option C is correct:
http://pubs.vmware.com/vsphere-
50/index.jsp?topic=/com.vmware.vsphere.vcenterhost.doc_50/GUID-3B5AF2B1-C534-4426- B97A-D14019A8010F.html

Option D is correct:
Per default the service and ports are disable after installation.