简答题 什么是静态NAT？

多项选择题WhenusingIPSLAFTPoperation，whichtwoFTPmodesaresupported？（）

A.Only the FTP PUT operation type is supported.
B.Active mode is supported.
C.Passive FTP transfer modes are supported.
D.FTP URL specified for the FTP GET operation is not supported.

问答题怎样保护密码？

多项选择题Refer to the exhibit. A network engineer received a sudden request to prioritize voice over his Cisco network and he has decided to leverage the AutoQoS feature. Based on the output shown, which two tasks need to be performed prior to issuing the autoqos voip command in this router? （）

A.Enable Cisco Express Forwarding.
B.Enable fast switching.
C.Delete all policy maps.
D.Remove service-policy commands from interface serial1/0.
E.Delete all the currently configured class maps.

单项选择题WhatsthedefaultstratumclockonaCiscorouter，whenyouseethekeyword master configuredontheNTPline？（）

A.1
B.2
C.4
D.6
E.8

问答题先描述的就是源树。然后说源和receiver通讯，问process叫什么？