What are the DSL-specific factors that require additional bandwidth when supporting Voice-over-IP over an IPSec VPN?（） A voice packet is sent via multiple fixed-length cells; a portion of the last cell is padding, requiring more bandwidth.。 ADSL typically uses PPPoE encapsulation, which adds additional overhead to each voice packet.。 A voice packet is sent via multiple fixed-length cells; each cell has about 10% Layer-2 header overhead. 。 IPSec requires additional overhead for the header and hash. 。 ADSL carrier band requires additional bits to be carried over the wire to the DSL Access Concentrator.。
设备安装位置应符合工程设计要求，其偏差不大于（）mm。 2。 5。 8。 10。
Which of the following three service requirements are included in the Cisco UnifiedCommunications optimize phase（） Business Case Alignment。 Security Assessment。 Incident management。 Operations Readiness Assessment。 Technology Assessment。
通常所说的设备，可以像机械一样人工手持操作。
量城市化发展的基本指标包括：①城市化水平指标；②（）；③城市化质量指标。其中城市化质量指标包括：城市现代化指标体系和（）。
Which of these is not part of the pre_ installation worksheet？（）
