单选题Refer to the exhibit. With an IPSec tunnel established between remote Router A and head-end router B, with Compressed Real-Time Protocol (cRTP) configured on the serial interface of Router A, what impact will the cRTP configuration have on the Voice over IP packets flowing through the IPSec tunnel from a Cisco 7960 IP phone?（）A Twenty bytes of header will be replaced with five bytes. B If the IPSec transform set includes Authentication Header, the receiving IPSec peer will discard the packets. C The IPSec packets will be dropped by Router A's compression logic.D The voice packets will not be compressed.
单选题
Refer to the exhibit. With an IPSec tunnel established between remote Router A and head-end router B, with Compressed Real-Time Protocol (cRTP) configured on the serial interface of Router A, what impact will the cRTP configuration have on the Voice over IP packets flowing through the IPSec tunnel from a Cisco 7960 IP phone?（）
A
Twenty bytes of header will be replaced with five bytes.
B
If the IPSec transform set includes Authentication Header, the receiving IPSec peer will discard the packets.
C
The IPSec packets will be dropped by Router A's compression logic.
D
The voice packets will not be compressed.
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