質問 1：The figure shows the logical network architecture of a migration project. The purpose of the migration is to add network device R4 between R2 and R3.
* OSPF runs between network devices.
* After the physical network is connected, a network engineer incorrectly imports the backup configuration of R3 to R4 during the migration.
Given this, which of the following statements are true?
Options:
A. An OSPF neighbor relationship can be established between R1 and R3.
B. An OSPF neighbor relationship can be established between R3 and R4.
C. The OSPF neighbor relationship between R1 and R2 is not affected.
D. An OSPF neighbor relationship can be established between R2 and R4.
正解：B,C
解説: (Topexam メンバーにのみ表示されます)
質問 2：On the network shown in the figure, EBGP peer relationships are established between ASs through directly connected interfaces.
* OSPF is deployed in AS 65456 (with OSPF disabled on interconnected interfaces between ASs).
* R4 and R5 use Loopback0 to establish iBGP peer relationships with R6.
* The IP address of Loopback0 on each router is 10.0.X.X/32, and the router ID is 10.0.X.X, where X is the number of the router.
* R1, R2, and R3 import the external route 192.168.1.0/24 into BGP through the import-route command.
Which of the following statements are true?
A. For 192.168.1.0/24, if the default local-preference 150 command is configured on R3, R5 preferentially selects the route received from R3.
B. For 192.168.1.0/24, R6 preferentially selects the route received from R4.
C. For 192.168.1.0/24, R5 preferentially selects the route received from R2.
D. For 192.168.1.0/24, R4 preferentially selects the route received from R1.
正解：A,C
解説: (Topexam メンバーにのみ表示されます)
質問 3：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 are available in area 0?
A. Intra-Area-Prefix-LSA
B. Inter-Area-Prefix-LSA
C. Inter-Area-Router-LSA
D. Link-LSA
正解：B,C
解説: (Topexam メンバーにのみ表示されます)
質問 4：On the network shown in the figure, a network engineer finds that the path between PC1 and PC2 is not the optimal path, and all links along the path have the same cost.
Given this, which of the following routers may be the root bridges of the Layer 2 network?
Options:
A. SW2
B. SW4
C. SW3
D. SW1
正解：B,D
解説: (Topexam メンバーにのみ表示されます)
質問 5：In the hub-spoke networking shown in the figure, the Hub-PE can be configured to allow repetitive local AS numbers for correct route transmission.
Is this statement TRUE or FALSE?
Options:
A. FALSE
B. TRUE
正解：B
解説: (Topexam メンバーにのみ表示されます)
質問 6：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-1-2 is configured in the IS-IS process of R4.
Which of the following statements is false?
A. The routing table of R1 contains the route 2000::4/128.
B. The routing table of R3 contains the route 2000::/64.
C. The routing table of R5 does not contain the route 2000::/64.
D. The routing table of R2 contains the route 2000::/64.
正解：C
解説: (Topexam メンバーにのみ表示されます)
質問 7：Both VLAN aggregation and MUX VLAN are deployed on the enterprise network shown in the figure.
* All switch interfaces connected to terminals are access interfaces.
* Given this, match PC1 to PC4 with the hosts or servers they can access on the network.
(Note: A host cannot be matched with itself. For example, PC1 cannot match PC1. Tokens can be reused.)
正解：
Explanation:
Comprehensive and Detailed In-Depth Explanation:
To determine the correct matches, we need to analyze VLAN aggregation and MUX VLAN behavior in the given topology.
1. Understanding VLAN Aggregation and MUX VLAN Roles
* VLAN Aggregation:
* Sub-VLANs (e.g., VLAN 10) are part of a Super-VLAN (e.g., VLAN 100) and share a common gateway.
* Hosts in the same Sub-VLAN can communicate directly.
* MUX VLAN (Multiple User Group VLAN):
* Principal VLAN (VLAN 30): Includes servers, accessible by all VLAN types.
* Separate VLAN (VLAN 20): Cannot communicate with other Separate VLAN hosts, but can communicate with the Principal VLAN (Server).
* Group VLAN (VLAN 10 - Sub-VLANs): Hosts within the same Group VLAN can communicate, and they can also access the Principal VLAN (Server).
2. Analyzing the Connectivity
* PC1 (Sub-VLAN 10 - Employee VLAN)
* Can communicate with PC2 (same Sub-VLAN).
* Can communicate with the Server (VLAN 30 - Principal VLAN).
* PC2 (Sub-VLAN 10 - Employee VLAN)
* Can communicate with PC1 (same Sub-VLAN).
* Can communicate with the Server (VLAN 30 - Principal VLAN).
* PC3 (VLAN 20 - Separate VLAN - Guest VLAN)
* Cannot communicate with other PCs in Employee VLAN (PC1, PC2) or Guest VLAN (PC4).
* Can communicate with the Server (VLAN 30 - Principal VLAN).
* PC4 (VLAN 20 - Separate VLAN - Guest VLAN)
* Cannot communicate with other PCs in Employee VLAN (PC1, PC2) or Guest VLAN (PC3).
* Can communicate with the Server (VLAN 30 - Principal VLAN).
* Server (VLAN 30 - Principal VLAN)
* Can communicate with all PCs (PC1, PC2, PC3, PC4) because it belongs to the Principal VLAN, which serves all VLANs.
質問 8：The figure shows information about VPN1 on a PE (Provider Edge) router in a BGP/MPLS IP VPN network.
When the VPNv4 route corresponding to VPN1 is advertised to the remote PE, which VPNs of the remote PE will accept the route?
VPN1 Configuration:
ip vpn-instance VPN1
ipv4-family
route-distinguisher 100:1
vpn-target 100:1 200:1 300:1 export-extcommunity
VPN Import Policies on the Remote PE:
A. VPN1: Import RT=100:1
B. VPN2: Import RT=200:1, 400:1
C. VPN3: Import RT=100:1, 300:1
D. VPN4: Import RT=500:1
正解：A
解説: (Topexam メンバーにのみ表示されます)
質問 9：On the network shown in the figure, EBGP peer relationships are established between neighboring routers through directly connected interfaces.
* The router ID of each router is 10.0.X.X, and the AS number is 6500X, where X is the number of the router.
* Both R1 and R4 have static routes to 192.168.1.0/24, which are imported to BGP through the import-route command.
Which of the following statements are true?
A. The path for traffic from R5 to 192.168.1.0/24 is R5 # R4.
B. The path for traffic from R3 to 192.168.1.0/24 is R3 # R2 # R1.
C. The path for traffic from R6 to 192.168.1.0/24 is R6 # R5 # R4.
D. The path for traffic from R2 to 192.168.1.0/24 is R2 # R1.
正解：A,B,C,D
解説: (Topexam メンバーにのみ表示されます)
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Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 認定 H12-831_V1.0-ENU 試験問題:
1. The figure shows information about VPN1 on a PE (Provider Edge) router in a BGP/MPLS IP VPN network.
When the VPNv4 route corresponding to VPN1 is advertised to the remote PE, which VPNs of the remote PE will accept the route?
VPN1 Configuration:
ip vpn-instance VPN1
ipv4-family
route-distinguisher 100:1
vpn-target 100:1 200:1 300:1 export-extcommunity
VPN Import Policies on the Remote PE:
A) VPN1: Import RT=100:1
B) VPN2: Import RT=200:1, 400:1
C) VPN3: Import RT=100:1, 300:1
D) VPN4: Import RT=500:1
2. OSPF requires that routers in the same area have the same link state database (LSDB). As the number of routes on the network increases, some routers cannot carry so much routing information due to limited system resources. This state is called database overflow. If the Isdb-overflow-limit number 7 command is run on all routers on an OSPF network, which of the following conditions are likely to cause routers to enter the overflow state?
A) The number of Type 4 LSAs exceeds 7.
B) The number of Type 3 LSAs exceeds 7.
C) The number of Type 7 LSAs exceeds 7.
D) The number of Type 5 LSAs exceeds 7.
3. The figure shows information about an LSP (Link-State PDU) generated by an IS-IS router.
From the LSP, you can infer that the router is not the DIS (Designated Intermediate System) of the local link.
Options:
A) FALSE
B) TRUE
4. The figure shows an MPLS packet with multiple labels.
Which of the following values for the S field is correct?
A) S1 = 2, S2 = 1, S3 = 0
B) S1 = 0, S2 = 0, S3 = 1
C) S1 = 3, S2 = 2, S3 = 1
D) S1 = 1, S2 = 1, S3 = 0
5. On the IS-IS network shown in the figure, R1 imports a default route using the default-route-advertise always level-1 command. Which of the following statements is false?
A) 10.0.1.1 can ping 10.0.3.3.
B) 10.0.1.1 can ping 10.0.2.2.
C) 10.0.2.2 can ping 10.0.3.3.
D) If R1 pings a nonexistent IP address, for example, 10.0.4.4, R1 does not send any data packets.
質問と回答：
質問 # 1
正解： A | 質問 # 2
正解： D | 質問 # 3
正解： B | 質問 # 4
正解： B | 質問 # 5
正解： A |
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