Which two settings should be configured on the SIP Trunk Security Profile for the IM & Presence Service SIP Trunk? (Choose two.)
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A. B. C. D. E.AB.
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/security/9_1_1/secugd/CUCM_BKThe SIP Trunk Security Profile for the IM & Presence Service SIP Trunk in Cisco Unified Communications Manager (CUCM) defines security settings for the Session Initiation Protocol (SIP) trunk that connects the CUCM with the IM & Presence Service server. The security settings ensure secure and reliable communication between the two entities.
The two settings that should be configured on the SIP Trunk Security Profile for the IM & Presence Service SIP Trunk are:
A. Check to enable Accept Presence Subscription: This setting allows the IM & Presence Service server to subscribe to the presence status of devices registered with the CUCM. When a device changes its status, such as going on-hook or off-hook, the CUCM sends a notification to the IM & Presence Service server, which updates the presence status of the device in its database. This setting should be enabled to ensure proper synchronization of presence information between the CUCM and the IM & Presence Service server.
B. Verify that the setting for Incoming Transport Type is TCP+UDP: This setting specifies the transport protocol that the SIP trunk will use to receive incoming messages from the IM & Presence Service server. The options are TCP, UDP, or TCP+UDP. TCP is a connection-oriented protocol that ensures reliable delivery of messages, but it may introduce some delay due to the establishment and teardown of connections. UDP is a connectionless protocol that provides fast delivery of messages but may lose packets in transit. TCP+UDP is a hybrid option that uses TCP for the initial connection setup and UDP for subsequent data transmission. This setting should be configured to TCP+UDP to ensure optimal performance and reliability of the SIP trunk.
The other answer options are:
C. Configure Device Security Mode to Encrypted: This setting defines the security mode for the devices that are registered with the CUCM. It does not apply to the SIP trunk itself, so it is not relevant to this question.
D. Check to enable Enable Application Level Authorization: This setting enables application-level authorization for SIP messages exchanged between the CUCM and the IM & Presence Service server. It is not a mandatory setting for the IM & Presence Service SIP Trunk, so it is not one of the two settings that should be configured.
E. Configure the Outgoing Transport Type to TLS: This setting specifies the transport protocol that the SIP trunk will use to send outgoing messages to the IM & Presence Service server. The options are TCP, UDP, or TLS. TLS is a secure version of TCP that provides encryption and authentication of messages, but it may introduce some overhead due to the cryptographic operations. This setting is not required for the IM & Presence Service SIP Trunk, so it is not one of the two settings that should be configured.