Which of the following statements are true about NSAP addresses

• A.System ID is used to identify the IS in the area. In the integrated IS-IS, it is recommended to convert the router ID of the system or the MAC address of the interface.
• B.NSAP address and SystemID and NSEL three parts
• C.Area address and SystemID are fixed length, NSEL is variable length
• D.NSAP is equivalent to the IP address and protocol number in the IP network. The same NSAP of the two systems will cause abnormal communication

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In the following statement about PBR (polic-based-route, policy-based routing) load balancing application, the correct one is _____________.

• A.PBR can implement load balancing on the outgoing interface according to the source address of the packet
• B.PBR can implement load balancing on the outbound interface according to the next hop of the route
• C.PBR can implement load balancing on the outbound interface according to the different bearer services of the data flow
• D.PBR can implement load balancing on the outgoing interface according to different packet lengths

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After executing the displaospf routing command on the MSR router RTA, the router output is as follows:

From the above output it can be judged that ______.

• A.192.168.102.1 is the Tpe2 LSA received
• B.192.168.100.1 is the received Tpe1 LSA
• C.192.168.2.0 This network segment is not in Area0
• D.There are 6 OSPF routes in total, including 1 intra-area route, 1 inter-area route, and 4 external routes

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In the topology shown in the figure, execute the following command on the RTA:
RTA-ospf-1] default-route-advertise
The default route cannot be observed in the routing table of the RTC router, the possible reason is ______

• A.No default route in RTA's routing table
• B.default-route-advertise This command does not configure the alwa parameter
• C.RTA did not inject the default route into the OSPF area via the import command
• D.PBR is configured on the RTC to filter the default route

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The output of displaospfv3 route on a router is as follows:
E1 - Tpe 1 external route, IA - Inter area route, I - Intra area route
E2 - Tpe 2 external route, * - Selected route
OSPFv3 Router with ID ( 2.2.2.2) ( Process 1)
-------------------------------------------------- ----------------------
*Destination: 1::1/128
Tpe: IA Cost: 1562
NextHop: FE80::1 Interface: Tun1
*Destination: 2::2/128
Tpe: I Cost: 0
NextHop: directl-connected Interface: Loop0
*Destination: 3::3/128
Tpe: IA Cost: 1562
NextHop: FE80::3 Interface: Tun3
*Destination: 2009:1::/64
Tpe: IA Cost: 1563
NextHop: FE80::1 Interface: Tun1
*Destination: 2009:2::/64
Tpe: I Cost: 1
NextHop: directl-connected Interface: Vlan1
*Destination: 2009:3::/64
Tpe: IA Cost: 1563
NextHop: FE80::3 Interface: Tun3
There are ______ inter-area routes learned by this router.

• A.4
• B.2
• C.1
• D.3

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