多选题What are the DSL-specific factors that require additional bandwidth when supporting Voice-over-IP over an IPSec VPN?（）AA voice packet is sent via multiple fixed-length cells; a portion of the last cell is padding, requiring more bandwidth.BADSL typically uses PPPoE encapsulation, which adds additional overhead to each voice packet.CA voice packet is sent via multiple fixed-length cells; each cell has about 10% Layer-2 header overhead.DIPSec requires additional overhead for the header and hash.EADSL carrier band requires additional bits to be carried over the wire to the DSL Access Concentrator.
多选题
What are the DSL-specific factors that require additional bandwidth when supporting Voice-over-IP over an IPSec VPN?（）
A
A voice packet is sent via multiple fixed-length cells; a portion of the last cell is padding, requiring more bandwidth.
B
ADSL typically uses PPPoE encapsulation, which adds additional overhead to each voice packet.
C
A voice packet is sent via multiple fixed-length cells; each cell has about 10% Layer-2 header overhead.
D
IPSec requires additional overhead for the header and hash.
E
ADSL carrier band requires additional bits to be carried over the wire to the DSL Access Concentrator.
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