群体性事件是指在某一阶段某种共同利益下结成联盟，分为群体性暴力事件和群体性非暴力事件。群体性

A. An IP address is required on the physical interface of the central router.

B. All routers are required to be fully meshed.

C. All routers must be in the same subnet to forward routing updates and broadcasts.

D. Multipoint is the default configuration for Frame Relay subinterfaces.

A. Router(config-line)# access-class 10 in

B. Router(config-if)# ip access-class 23 out

C. Router(config-line)# access-group 15 out

D. Router(config-if)# ip access-group 110 in

E. Router(config-line)# access-list 150 in

F. Router(config-if)# ip access-list 128 out

A. a pseudora ndom generated number

B. its locally configured IPv4 address

C. the DHCP - supplied device ID

D. its MAC address

A.A→D→C→G→E→F→B

B.A→D→E→G→C→F→B

C.C→D→F→G→E→A→B

D.C→D→F→G→A→E→B

E.F→D→C→G→A→E→B

A.DevicesconnectedtointerfacesFastEthernet3/1andFastEthernet3/2aresendingBPDUswithasuperiorrootbridgeparameter，buttrafficisstillforwardedacrosstheports.

B.InterfacesFastEthernet3/1andFastEthernet3/2arecandidateforbecomingtheSTProotport，butneithercanrealizethatroleuntilBPDUswithasuperiorrootbridgeparameterarenolongerreceivedonatleastoneoftheinterfaces.

C.DevicesconnectedtointerfacesFastEthernet3/1andFastEthernet3/2aresendingBPDUswithasuperiorrootbridgeparameterandnotrafficisforwardedacrosstheports.OnceinaccurateBPDUshavebeenstopped，theinterfacesautomaticallyrecoverandresumenormaloperation.

D.DevicesconnectedtointerfacesFastEthernet3/1andFastEthernet3/2aresendingBPDUswithasuperiorrootbridgeparameterandnotrafficisforwardedacrosstheports.OnceinaccurateBPDUshavebeenstopped，theinterfaceswillneedtobeadministrativelyshutdown，andbroughtbackup，toresumenormaloperation.

A.Sw-DS1

B.Sw-AC1

C.Sw-AC2

D.Sw-AC3

A. R3 is an ABR.

B. R3 is not connec ted to the backbone.

C. R3 has four neighbors.

D. R3 is the DR for area 2.

A.Fa0/1

B.Fa0/3

C.Fa0/6

D.Fa0/8

E.Fa0/9

F.Fa0/12

A.192.168.1.254

B.192.168.22.254

C.192.168.33.254

D.192.168.44.254