After the above steps, {HEAD ~ the management station} first implements {TAIL ~ an identity authentication} to the SSH server of the managed device according to the related information of the SSH host key obtained 
implements
After the above steps , { HEAD ~ the management station } first implements { TAIL ~ an identity authentication } to the SSH server of the managed device according to the related information of the SSH host key obtained
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH