事故巡线时,应始终认为线路()。 停电。 不带电。 带电。 不正常。
Which two design concerns must be addressed when designing a multicast implementation?() only the low-order 23 bits of the MAC address are used to map IP addresses。 only the low-order 24 bits of the MAC address are used to map IP addresses。 only the high-order 23 bits of the MAC address are used to map IP addresses。 only the low-order 23 bits of the IP address are used to map MAC addresses。 the 0x01004f MAC address prefix is used for mapping IP addresses to MAC addresses。 the 0x01005e MAC address prefix is used for mapping IP addresses to MAC addresse。
酶的定向进化过程
Which of these technologies is characterized as being a multipoint Layer 2 VPN that connects twoor more customer devices using Ethernet bridging techniques?() DPT。 MPLS。 VPLS。 CWDM。 DWDM。 SONET/SDH。
地质事件
之所以要强调师德,是因为()。