当106次解密/μs所需的时间是10小时时，密钥位数为（)位。A．32B．56C．128D．168

A.Addresses are permanently assigned so that the host uses the same address at all times.

B.Addresses are assigned for a fixed period of time. At the end of the period, a new request for an address must be made, and another address is then assigned.

C.Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.

D.Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.

A.Takeanypacketsourcedfromanyaddressinthe10.2.0.0/16networkordestinedto10.1.14.25andsetthenexthopto10.1.1.1

B.Takeanypacketsourcedfromanyaddressinthe10.2.0.0/16networkanddestinedto10.1.14.25andsetthenexthopto10.1.1.1

C.Nothing；extendedaccesslistsarenotallowedinroutemapsusedforpolicy-basedrouting

D.Dropanypacketsourcedfrom10.2.0.0/16

A.onlythelocalOSPFroutes

B.onlytheOSPFroutesinstalledintheroutingtable

C.onlytheremotelylearnedOSPFroutes

D.alltheOSPFroutesfromtheOSPFdatabasethatareeligibletobeputintheroutingtable

A.ipv6routerripccie distribute-list..

B.ipv6routerripccie offset-list..

C.interfacee0/0 ipv6ripcciedistribute-list..

D.interfacee0/0 ipv6ripccieadvertise..

A.Router(config)#router ospf 1

B.Router(config)#router ospf 0

C.Router(config)#router ospf area 0

D.Router(config-router)#network 192.168.16.0 0.0.0.255 area 0

E.Router(config-router)#network 192.168.16.0 0.0.0.255 0

F.Router(config-router)#network 192.168.16.0 255.255.255.0 area 0