单选题What do you need to upgrade the DXOS? （）A
an upgrade .gz file placed on your FTP serverB
an upgrade .tar file placed on your SCP serverC
an upgrade .pac file placed on your TFTP or SCP serverD
an upgrade CD provided by your Juniper Networks representat
题目
单选题
What do you need to upgrade the DXOS? （）
A
an upgrade .gz file placed on your FTP server
B
an upgrade .tar file placed on your SCP server
C
an upgrade .pac file placed on your TFTP or SCP server
D
an upgrade CD provided by your Juniper Networks representative
