A.False

B.True

A.The Attachment Bit can be generated by the Level-2 or Level-1-2 router.

B.The Attachment Bit is carried In Level-1 LSP generated by Level-1-2 router connected to another area.

C.The Attachment Bit can be generated in Level-2 LSP.

D.After the Level! router receives Level-1 LSP with Attachment bit set to 1, it will generates default route with the nearest Level-1-2 router as the next hop.

A.It is a multicast IP address.

B.It represents all the routers.

C.It is a private IP address.

D.It represents all the hosts and routers.

A.By using the EVPN technology, PB on the carrier's backbone network do not need to establish full connections, which greatly reduces the network complexity and reduces the number of signaling messages.

B.The PE learns the local and remote MAC addresses and their IP addresses through ARP and MAC address advertisement routes, and caches the information locally to prevent ARP request packets from being broadcast to other PEs and reduce network resource consumption.

C.EVPN enables a device to implement load balancing among multiple EVPN routes with the same destination MAC address but different next hops when managing MAC addresses.

D.EVPN needs to be configured to be in full connection state on all PEs on the carrier's backbone network.
That is, PWs must be set up between any two PEs.

A.The TTL value of device from different manufactures is different; on VRP, the TTL value is 1.

B.The VRRP packet is only forwarded in one IP network, so the TTL value is always set to 1.

C.By default, the VRRP packet with TTL value not equal to 255 will be dropped; On VRP, we can use some commands to disable the function of delecting TTL value.

D.The TTL value must be 255 In normal VRRP packet.