問題文
A site turns on SIP OAuth mode so that its desk phones and soft clients can encrypt media and signaling. Which statement matches what the guide says about what those endpoints then need?
選択肢
- They need no certificate of their own, and the tomcat certificate may stay as the system generated it, since the whole exchange rides inside the token.
- They need no certificate of their own, but the tomcat certificate that the call control side presents has to be signed by an authority for this to work.
- They need a certificate of their own, and the tomcat certificate has to be signed by an authority as well, so both sides of the connection carry a signed identity.
- They need a certificate of their own, while the tomcat certificate may stay as the system generated it, in that the identity that counts is the endpoint's.