多项选择题 Whichtwonetworkinginfrastructurecharacteristicsaremostlikelytodistinguishvideorequirements（suchasCiscoTelePresence）fromvoicerequirements？（）

多项选择题 During voice implementation，  which two required items are configured at an access layer switch connected to an IP phone to provide VoIP communication？（）

多项选择题 A network is deployed using best practices of the enterprise campus network model， including users with desktop computers connected via IP phones. Given that all components are QoS-capable，  where are the two optimal locations for trust boundaries to be configured by the network administrator？（）