An ESXi 5.x host disconnects within 60 seconds after the administrator adds it to the vCenter
Server inventory. The administrator determines that the issue could be related to a networking
problem. Which networking port should the administrator check for connectivity from the host to
vCenter Server?
A.
902
B.
903
C.
443
D.
9443
Explanation:
A is correct
The default port that the vCenter Server system uses to send data to managed hosts. Managed hosts also send a regular heartbeat over UDP port 902 to the vCenter Server system. The port is also used for transmitting virtual machine consoles for ESXi 4.x and 5.x hosts. This port must not be blocked by firewalls between the server and the hosts or between hosts.
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2031843
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http://pubs.vmware.com/vsphere-55/topic/com.vmware.ICbase/PDF/vsphere-esxi-vcenter-server-55-security-guide.pdf
902 (Default)
The default port that the vCenter Server system uses to send data to managed hosts. Managed hosts also send a regular heartbeat over UDP port 902 to the vCenter Server system. This port must not be blocked by firewalls between the server and the hosts or between hosts.
Port 902 must not be blocked between the vSphere Client and the hosts. The vSphere Client uses this port to display virtual machine consoles.
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902 TCP/UDP
vCenter Server システムが、管理対象ホストにデータを送信するデフォルトのポートです。管理対象ホストは、UDP ポート 902 を使用して、vCenter Server システムに定期的なハートビートも送信します。このポートは、ESXi 4.x および 5.x ホストの仮想マシン コンソールの転送にも使用されます。サーバとホストの間、またはホスト同士の間で、このポートがファイアウォールにブロックされないようにする必要があります。
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