A network administrator needs to configure port security on a switch.which two statements are true?()
A. The network administrator can apply port security to dynamic access ports
B. The network administrator can configure static secure or sticky secure mac addresses in the voice vlan.
C. The sticky learning feature allows the addition of dynamically learned addresses to the running configuration.
D. The network administrator can apply port security to EtherChannels.
E. When dynamic mac address learning is enabled on an interface,the switch can learn new addresses,up to the maximum defined.
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张女士述说她在喂哺4月龄大的孩子母乳时,孩子经常吐奶,请你指导她该如何进行喂养?具体工作准备及程序如何?
在流感流行季节前接种和流感病毒匹配的流感疫苗可预防流感。
A. 正确
B. 错误
根据模块化和复用的原则,设计嵌入式微控制器系统时,需要设计哪些电路?
在直接通信方式中,系统提供的发送原语是()。
A. send(receiver,message)
B. send(sender,message)
C. send(sender,receiver)
D. send(receiver,sender)