【单选题】参见图示。若要将SWB中接PC机的端口配置为快速端口,正确命令是( )。 ga
A.
SWB# spanning-tree portfast
B.
SWB(config)# spanning-tree portfast
C.
SWB(config-if)# spanning-tree portfast
D.
SWB(config-if)# spanning-tree rstp
【单选题】商品的边际替代率是在( )的前提下,研究消费者增加一单位某商品的消费放弃另一种商品的消费数量的
【多选题】下列关于防火墙的描述,正确的是()。
B.
是Internet网和内部网之间采取的一种安全措施
【简答题】Mr Smith is an English man. He teaches English well. His English classes are very interesting. He likes us and we like him, too. Mr Smith has two children-Tom and Mary. Tom is seven and his sister, Ma...
【简答题】阅读理解。 Mr Green is a teacher of English . He comes from America . He teaches English in China. He speaks English quite well. He reads a lot of books and his wife Mrs Green often writes book for the stu...
【单选题】下列关于防火墙的描述 , 不正确的是:
B.
防火墙的主要工作原理是对数据包及来源进行检查,阻断被拒绝的数据
D.
尽管利用防火墙可以保护网络免受外部黑客的攻击,但其目的只是能够提高网络的安全性不可能保证网络绝对安全
【简答题】阅读理解。 Mr Smith is a teacher of English. He comes from America. He teaches English in China. He speaks Chinese quite well. He reads a lot of books and his wife often writes books for the students at ho...
【单选题】参见图示。若要将SWB中接PC机的端口配置为快速端口,正确命令是( )。
A.
SWB# spanning-tree portfast
B.
SWB(config)# spanning-tree portfast
C.
SWB(config-if)# spanning-tree portfast
D.
SWB(config-if)# spanning-tree rstp
【简答题】A.He is fond of English dishes. B.He is tired of puddings and pies. C.He enjoys English strawberry yogurt. D.He seldom has breakfast at home.
【单选题】商品的边际替代率是在( )前提下,研究消费者增加一个某商品的消费所放弃的另一种商品的消费数量的。