某高度为k的完全二叉树中，所含叶子结点的个数最少为（)。A．2kB．kC．2k-2D．2k-1

A.(config-if)#authentication ppp chap fallback ppp

B.(config-if)#authentication ppp chap pap

C.(config-if)#ppp authentication chap pap

D.(config-if)#ppp authentication chap fallback ppp

A. l2tp tunnelling

B. l2tp tunnel switching

C. l2tp tunnel-switching

D. enable l2tp tunnel switching

A. mpls fast reroute

B. mpls fast-reroute

C. enable mpls fast-reroute

D. tunnel mpls fast-reroute

A．A.Traceroute

B．B.Nslookup

C．C.Port scanner

D．D.Ping scanner

A.user EXEC mode

B.global configuration mode

C.privileged EXEC mode

D.auxiliary setup mode

A. debug authentication

B. debug chap ppp

C. debug chap authentication

D. debug ppp authentication

ity. Which command will display the CHAP authentication process as it occur between two routers in the network？（）

A.show chap authentication

B.show interface serial0

C.debug ppp authentication

D.debug chap authentication

E.show ppp authentication chap

A.setkst -t enable ; reboot

B.chrbac -a enable ; reboot

C.enable enhanced_RBAC ; reboot

D.chdev -l sys0 -a enhanced_RBAC=‘true‘ ; reboot

A. set system remote-access profile https

B. set services remote-access profile j-web-https

C. set system services web-management https

D. set services web-management j-web-https

A.ppp authentication chap pap

B.pppoe authentication chap pap

C.ppp authentication chap ppp authentication pap

D.pppoe authentication chap pppoe authentication pap