What are two differences between media flow-around and media flow-through on Cisco Unified Border Element? (Choose two,)

What are two differences between media flow-around and media flow-through on Cisco Unified Border Element? (Choose two,)
A . When using media flow-through, the call signaling and media are passed through the Cisco Unified Border Element.
B . When using media flow-around, the call signaling goes through the Cisco Unified Border Element, but media is not passed through it.
C . When using media flow-through, the call signaling goes through the Cisco Unified Border Element, but media is not passed through it,
D . When using media flow-through, call signaling goes through the Cisco Unified Border Element, but media does not.
E . When using media flow-around, both call signaling and media do not go through the Cisco Unified Border Element.

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Answer: A B