Huawei H12-831_V1.0-ENU 問題集

質問 1：
On the OSPFv3 network shown in the figure, the LSDB (Link-State Database) of R2 contains ______ Router-LSAs. (Enter only digits.)

正解：
3
Explanation:
1. Understanding Router-LSAs in OSPFv3
* Router-LSA (Type 1 LSA) is generated by every OSPFv3 router to describe its own links and connected networks within the same area.
* Each router in an OSPF area generates exactly one Router-LSA to advertise its own topology information.
* Router-LSAs are flooded throughout the area but do not cross area boundaries.
2. Analyzing the Given OSPFv3 Network
* The topology consists of three routers: R1, R2, and R3, all connected in OSPFv3 Area 0.
* Since all three routers participate in OSPFv3, each router generates its own Router-LSA (Type 1 LSA).
* R2, as an OSPF router, will have its own Router-LSA and also receive the Router-LSAs from R1 and R3.
3. Counting the Number of Router-LSAs in R2's LSDB
* R1 generates 1 Router-LSA (for itself).
* R2 generates 1 Router-LSA (for itself).
* R3 generates 1 Router-LSA (for itself).
* Total Router-LSAs in R2's LSDB = 3 (one from each router).
Final Answer:
HCIP-Datacom-Advanced Routing & Switching Technology References:
* OSPFv3 LSA Types and Their Roles
* Understanding Router-LSA (Type 1) and Its Function in LSDB

質問 2：
On the network shown in the figure, IS-IS runs on R1, R2, R4, and R5, and the area ID is 49.0001. IS-IS runs on R3 and R6, and the area ID is 49.0002. In AS 65000, R1, R3, R4, and R6 each establish iBGP peer relationships with R2 and R5. R2 and R5 are RRs (Route Reflectors), and R1, R4, R3, and R6 are clients. The iBGP peer relationships are established using Loopback0 on each router, and the router ID is 10.0.0.X/32, where X is the number of the router. R1 and R4 import the external route 192.168.1.0/24 to BGP through the import-route command, and R3 and R6 import the external route 192.168.2.0/24 to BGP through the import- route command. Which of the following statements are true?

A. The routing table of R1 does not contain the route 192.168.2.0/24.
B. For 192.168.1.0/24, R3 preferentially selects the BGP route received from R2, and R6 preferentially selects the BGP route received from R5.
C. The routing table of R4 contains two equal-cost default routes.
D. The route 192.168.1.0/24 in the routing table of R3 has two next hops.
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 3：
On a PIM-SM multicast network, a network engineer finds that multicast clients cannot receive multicast data. Which of the following is not a possible cause of this problem?
A. The unicast routes from multicast devices to the RP are unavailable.
B. The RP addresses of multicast devices are different.
C. The downstream interfaces of multicast devices do not receive any (*, G) Join messages.
D. Downstream interfaces of multicast devices are disabled from forwarding State-Refresh messages.
正解：D

質問 4：
If the display ospfv3 peer verbose command is run to check OSPFv3 neighbor information, the command output contains information such as the peer router ID, global unicast address of the peer interface, and neighbor status.
A. FALSE
B. TRUE
正解：B

質問 5：
On the network shown in the figure, EBGP peer relationships are established between neighboring routers through directly connected interfaces. The AS number is 6500X, where X is the number of the router. Both Rl and R4 have static routes to 192.168.1.0/24, which are imported to BGP through the import-route command.
By default, in the routing table of R3, which of the following is the AS_Path attribute carried in the route to
192.168.1.0/24?
A. 65006, 65005, 65004, 65001
B. 65006, 65005, 65004
C. 65002, 65001
D. 65002, 65005, 65004
正解：B

質問 6：
Service routes of an enterprise are transmitted on the network. Some configurations of PE1 and PE2 are shown in the figure. Which of the following LSAs may CE2 receive?

A. Type 5 LSA
B. Type 3 LSA
C. Type 1 LSA
D. Type 7 LSA
正解：B,C

質問 7：
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?

A. Intra-Area-Prefix-LSA
B. Inter-Area-Prefix-LSA
C. NSSA LSA
D. AS-External-LSA
正解：D
解説: (Topexam メンバーにのみ表示されます)

質問 8：
After port isolation is configured on a switch, hosts in the same VLAN cannot communicate with each other at Layer 2 or Layer 3 by default.
A. FALSE
B. TRUE
正解：B

質問 9：
On the OSPF network shown in the figure, area 1 is a common area, area 2 is a stub area, and area 3 is an NSSA. R5 imports an external route 10.0.5.5/32. Given this, which of the following routers does not have the route 10.0.5.5/32 in its routing table?

A. R3
B. R2
C. R6
D. R4
正解：D
解説: (Topexam メンバーにのみ表示されます)