Which of the following statements are true regarding the SIP session helper and the SIP application layer gateway (ALG)? (Choose three.)

Which of the following statements are true regarding the SIP session helper and the SIP application layer gateway (ALG)? (Choose three.)
A . SIP session helper runs in the kernel; SIP ALG runs as a user space process.
B . SIP ALG supports SIP HA failover; SIP helper does not.
C . SIP ALG supports SIP over IPv6; SIP helper does not.
D . SIP ALG can create expected sessions for media traffic; SIP helper does not.
E . SIP helper supports SIP over TCP and UDP; SIP ALG supports only SIP over UDP.

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Answer: B,C,D