問題文
A deployment holds two kinds of certificate on its handsets, one placed there in the factory and one issued locally. What is said of the one from the factory?
選択肢
- It can be written over once a local one is in place, and it is meant to be replaced at that point, since no handset is meant to hold two that do not agree.
- It can be removed once the site has an authority of its own, and it is meant to be handed back, since a root outside the site would stay in the chain.
- It can be neither written over nor removed, and it is meant to serve for the issue of the local one, since its own root can be given away to an attacker.
- It can be used for every secure exchange that the handset takes part in, and it is meant to spare the site the work of issuing one, since it is signed at the factory.