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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.
参考答案
更多 “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.” 相关考题
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