语音的本质属性是（）。 ["生理属性","物理属性","社会属性","自然属性"]
在系统概要设计时，网络设备选择时具体要考虑哪几方面的因素？
You have amulti-area OSPF network and you’re concerned because one of the sites is having connectivity problem to resources in a different area. Which IOS privileged mode command would you enter to confirm that your network ：A.has a path to itsABR，B.has a path to itsASBR，and C.the SPF calculation is functional（） ["show ip protocols","show running-config","show ip ospfneighbor","show ip ospfborder-router"]
混床再生的操作步骤。
Which two statements are true about voice ports on a router？ （） [" Calls to the PSTN can be made via the use of FXO or T1\/E1 trunk ports."," Calls to the PSTN can be made via FXS or T1\/E1 trunk ports."," Analog and IP phones can be connected to the VoIP network via FXO or T1\/E1 trunk ports."," Calls between analog phones that are attached to the FXS ports in a VoIP network can be completely processed by voice-enabled routers."]
土粒密度
