Which statement about the ip classless router command is true?（） The ip classless command is enabled by default in recent versions of IOS.。 The ip classless command should only be enabled when static routing is being used instead of a routing protocol.。 The ip classless command should be enabled by the network administrator whenever RIPv1 or IGRP is being used.。 The ip classless command should be enabled by the network administrator whenever OSPF, RIPv2, or EIGRP is being used.。
和平发展，（），已经成为21世纪中国核心的国家利益。 和平稳定。 和平安全。 和平幸福。 和平崛起。
煤气.氧气管道接地电阻不应大于（）欧姆 15。 10。 5。
Exhibit： You work as a network administrator at. You study the exhibit carefully. In the wireless LAN all devices are configured with static WEP keys. What will happen if the access point receives packets sent by the wireless client adapter that are not encrypted with the appropriate key？（） The wireless client adapter will not be authenticated by the authentication server， but the access point deliver the packets to the intended receiver.。 The wireless client adapter will not be able to send any packets to the access point.。 The access point will discard the packets and never deliver them to the intended receiver.。 The wireless client adapter will be authenticated by the authentication server and the access point will deliver the packets to the intended receiver.。
当安全阀需要进行气密试验时，不允许泄漏应当持续的时间是（） 2min。 3min。 4min。 5mi。
为孕妇进行子宫底高度和腹围的测量时不用评估：（）
