When setting up the registration-caching parameter to enabled in the sip-interface configuration element, _____________.
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A. B. C. D. E.A.
The "registration-caching" parameter is a configuration option that controls whether the Oracle Communications Session Border Controller (SBC) caches the registration information of SIP endpoints. When this parameter is enabled in the "sip-interface" configuration element, the SBC caches the registration information of SIP endpoints that register with the SBC. The caching of registration information can help reduce the load on the SBC and improve its overall performance.
The correct answer to the question depends on the specific behavior of the SBC when the "registration-caching" parameter is enabled. Let's go through each answer choice:
A. The statement that "the Session Border Controller will never use the SIP-NAT mechanism for routing" is incorrect. Enabling registration caching does not disable the use of SIP-NAT for routing.
B. The statement that "the Session Border Controller will not use the registration cache for routing" is incorrect. Enabling registration caching means that the SBC will use the cached registration information for routing.
C. The statement that "all endpoints in the realm will be cached when registered" is incorrect. Enabling registration caching only caches the registration information of endpoints that register with the SBC.
D. The statement that "only endpoints behind NAT in the realm will be cached when registered" is also incorrect. Enabling registration caching caches the registration information of all endpoints that register with the SBC, regardless of whether they are behind NAT.
E. The statement that "the Session Border Controller will never use the local-policy mechanism for routing" is incorrect. Enabling registration caching does not disable the use of local-policy for routing.
Therefore, none of the answer choices provide an accurate description of the behavior of the SBC when the "registration-caching" parameter is enabled. However, we can conclude that enabling registration caching allows the SBC to cache the registration information of endpoints that register with it, and use this information for routing purposes.