The correct answers are B and C. On Cisco MDS 9000 switches, device aliases are configured within the device-alias database configuration mode, which is entered using the command device-alias database. This is required before defining or modifying any device alias entries, making option B mandatory.

Once inside the device-alias database, the alias is created using the syntax:

device-alias name < alias-name > pwwn < WWN >

Here, pwwn (Port World Wide Name) is the correct identifier used for Fibre Channel endpoints. Therefore, the command

device-alias name Marketing pwwn 21:00:00:00:11:11:22:22

correctly maps the alias Marketing to the specified WWN, making option C correct.

Option D is incorrect because Cisco syntax specifically uses pwwn, not wwn, for device alias definitions. Option A is unrelated, as VSAN database configuration is used for VSAN settings, not device aliases. Option E is invalid because device-alias rename is not used to create a new alias.

Thus, the correct process is entering the device-alias database and then defining the alias using the pwwn keyword.