Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - H12-831_V1.0 模擬練習
MPLS supports nesting of multiple labels. After receiving an MPLS packet, a device first processes the label next to the Layer 2 header, that is, the top MPLS label.
正解: B
Each OSPFv3 router generates a Link-LSA for each link. A Link-LSA describes information such as the link-local address, IPv6 address prefix, and port number associated with the link, and provides the link options to be set in the Network-LSA. It is transmitted only on the link.
正解: B
解説: (PassTest メンバーにのみ表示されます)
On an MPLS network , when a transit device receives an MPLS packet and is ready to swap labels , it finds that the label value after swapping is 0 . In this case, which of the following operations will the device perform?
Options:
Options:
正解: D
解説: (PassTest メンバーにのみ表示されます)
On the IS-IS IPv6 network shown in the figure:
* Multi-topology is enabled on all routers.
* The IPv6 address of Loopback0 on R4 is 2000::4/128.
* The command ipv6 summary 2000::/64 level-2 is configured in the IS-IS processes of R2 and R1 .
* The command ipv6 import-route isis level-2 into level-1 is configured in the IS-IS processes of R1, R2, and R3 .
Which of the following routers have the route 2000::/64 in their routing tables?
* Multi-topology is enabled on all routers.
* The IPv6 address of Loopback0 on R4 is 2000::4/128.
* The command ipv6 summary 2000::/64 level-2 is configured in the IS-IS processes of R2 and R1 .
* The command ipv6 import-route isis level-2 into level-1 is configured in the IS-IS processes of R1, R2, and R3 .
Which of the following routers have the route 2000::/64 in their routing tables?
正解: A,D
解説: (PassTest メンバーにのみ表示されます)
On the IS-IS IPv6 network shown in the figure, each interface of R1 and R2 has two IPv6 addresses.
Because the IPv6 address prefixes of R1 and R2 are different, they cannot be used to establish a neighbor relationship.
Because the IPv6 address prefixes of R1 and R2 are different, they cannot be used to establish a neighbor relationship.
正解: A
解説: (PassTest メンバーにのみ表示されます)
On the OSPFv3 network shown in the figure, area 1 is an NSSA. R1 imports the external route 2000::1/128 to OSPFv3. Which of the following LSAs does not exist in area 1?
正解: A
解説: (PassTest メンバーにのみ表示されます)
VLAN aggregation uses multiple sub-VLANs to isolate broadcast domains on a physical network and aggregates these sub-VLANs into a logical super-VLAN. Which of the following statements is true about VLAN aggregation?
正解: C
解説: (PassTest メンバーにのみ表示されます)
On an enterprise network shown in the figure, if CE2 is dual-homed to PE2 and PE3 , a routing loop may occur during the exchange of Type 5 LSAs (External LSAs in OSPF) .
To prevent the loop, the route-tag command can be run on PE2 and PE3 .
In this way, if the route tag of the route received by PE3 is the same as that configured locally, the route is ignored.
Is this statement True or False?
To prevent the loop, the route-tag command can be run on PE2 and PE3 .
In this way, if the route tag of the route received by PE3 is the same as that configured locally, the route is ignored.
Is this statement True or False?
正解: B
解説: (PassTest メンバーにのみ表示されます)
On the network shown in the figure, OSPF is deployed on R1 and R2. IS-IS is deployed on R2 and R3. To enable R1 to obtain the route to 10.0.3.3/32, ISIS routes are imported into OSPF on R2. In this case, the next hop address to 10.0.3.3/32 in the routing table of R1 is_____.
正解:
10.0.23.2
On the OSPF network shown in the figure, the cost values of links are marked, and OSPF IP FRR is enabled on R1. Which of the following statements are true?
正解: A,B,D
On the IS-IS IPv6 network shown in the figure, if you check the LSDB on R1, the command output shows that R1 is the DIS.
正解: B
解説: (PassTest メンバーにのみ表示されます)
OSPF supports equal-cost load balancing. When the number of equal-cost routes on the network is greater than the number specified in the maximum load-balancing command and the candidate routes have the same priority (weight value), the routes with larger interface indexes are selected for load balancing.
正解: A
解説: (PassTest メンバーにのみ表示されます)
OSPFv3 packets are encapsulated in IPv6 packets . Which of the following is the value of the Next Header field in the IPv6 packet header ?
Options:
Options:
正解: A
解説: (PassTest メンバーにのみ表示されます)