What are two reasons for using a virtual link in OSPF?() A. Provides fast convergence times.B. Supports connections of multiple backbones.C. Eliminates the need for a Designated Router.D. Supports non direct connections to the backbone.
What are two reasons for using a virtual link in OSPF?()
A. Provides fast convergence times.
B. Supports connections of multiple backbones.
C. Eliminates the need for a Designated Router.
D. Supports non direct connections to the backbone.
相关考题：
Which configuration command creates a virtual router called isp－1?() A.virtual-routerisp-1B.virtual-routerISP-1C.virtual-routerVRisp-1D.virtual-routerVRISP-1
Several links have been broken so th at for the next day or two, what was formerly a contiguous area 0 has been broken into two parts. However, both parts of area 0 have working links into area 1 using routers with RID 1.1.1.1 and 2.2.2.2.Which answers list the command on the router with RID 1.1.1.1 to create a virtual link to help solve this temporary problem?（）A. area 0 virtual - link 2.2.2.2B. area 1 virtual - link 2.2.2.2C. area 0 source - rid 1.1.1.1 dest - rid 2.2.2.2D. virtual - link transit - area 1 RID 2.2.2.2
Refer to the exhibit. During the process of configuring a virtual link to connect area 2 with the backbone area, the network administrator received this console message on R3:*Mar 1 00:2 5:01.084: %OSPF -4- ERRRCV: Received invalid packet: mismatch area ID, from backbone area must be virtual link but not found from 20.20.20.1, Serial 0 .How should the virtual link be configured on the OSPF routers to establish full connectivity between the areas?（）A.R1(config - router)# area 0 virtual - link 1.1.1.1R3(config - router)# area 2 virtual - link 3.3.3.3B.R1(config - router)# area 1 virtual - link 2.2.2.2 R3(config - router)# area 1 virtual - link 2.2.2.2C.R1(config - router)# area 1 virtual - link 20.20 .20.2 R3(config - router)# area 1 virtual - link 30.30.30.2D.R1(config - router)# area 1 virtual - link 30.30.30.3 R3(config - router)# area 1 virtual - link 20.20.20.1E.R1(config - router)# area 1 virtual - link 3.3.3.3 R3(config - router)# area 1 virtual - link 1.1 .1.1
OSPF路由器在建立完成邻接关系之后处于的稳定状态是（）A．two-wayB．fullC．one-wayD．exchange