When You Install the Simpana Backup Client on a Virtual

When you install the Simpana backup client on a virtual machine and perform a backup, the backup job status becomes pending and reports an error message "Cannot decode packet header: invalid start signature ", please analyze which of the following may be the cause of this problem?

A) VM NIC adapter error
B) The media server backup service is abnormal
C) The backup client service is abnormal
D) Virtual machine disk class behavior IDE