You have a SPARC-based server with Solaris 8 OS installed on it, and you want to upgrade that system to run Solaris 10 OS. According to company policy, all installations must be done over the network, and network installations must be done using a secure protocol.
Which installation method must you use?
a WANboot installation
a JumpStart installation
a Flash Archive installation
the Solaris Live Upgrade method using the lu command and a spare disk drive