최신 H12-831_V1.0-ENU 무료덤프 - Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0
On the IS-IS IPv6 network shown in the figure, after the network becomes stable:
* R1 can ping 2000:12::0, and
* The display ipv6 neighbors command can be used to display the MAC address corresponding to
2000:12::0.
Is this statement TRUE or FALSE?
* R1 can ping 2000:12::0, and
* The display ipv6 neighbors command can be used to display the MAC address corresponding to
2000:12::0.
Is this statement TRUE or FALSE?
정답: A
설명: (DumpTOP 회원만 볼 수 있음)
On the OSPF network shown in the figure, drag the values on the left to the correct positions so that:
* Traffic from PC1 to PC2 follows the path:PC1 -> R1 -> R3 -> R2 -> PC2
* Traffic from PC2 to PC1 follows the path:PC2 -> R2 -> R1 -> PC1
Which of the following OSPF cost values should be assigned to Cost-A, Cost-B, and Cost-C to achieve this routing behavior?
* Traffic from PC1 to PC2 follows the path:PC1 -> R1 -> R3 -> R2 -> PC2
* Traffic from PC2 to PC1 follows the path:PC2 -> R2 -> R1 -> PC1
Which of the following OSPF cost values should be assigned to Cost-A, Cost-B, and Cost-C to achieve this routing behavior?
정답:
Explanation:
* A = 50
* B = 10
* C = 20
Comprehensive and Detailed In-Depth Explanation:
Understanding OSPF Path Selection and Cost Calculation:
* OSPF selects the shortest path (lowest cost) to the destination.
* The OSPF cost is determined by the cumulative sum of interface costs along a path.
* By assigning specific costs to A, B, and C, we can influence OSPF's path selection to meet the desired routing behavior.
Step-by-Step Analysis of Required Traffic Flow:
1. Traffic from PC1 to PC2 must take the route:
PC1 -> R1 -> R3 -> R2 -> PC2
* To force traffic through R3, the cost of the direct link R1 -> R2 (Cost-A) must be higher than the alternative path via R3.
* We assign Cost-A = 50 (high cost) to discourage direct routing from R1 -> R2.
* The cost of R1 -> R3 (Cost-C) should be lower, so we assign Cost-C = 20.
* The cost of R3 -> R2 (default Cost-20) remains unchanged.
* Total cost via R3: 20 (R1->R3) + 20 (R3->R2) = 40, which is less than the direct link of 50, so OSPF prefers this path.
# Traffic follows: PC1 -> R1 -> R3 -> R2 -> PC2
2. Traffic from PC2 to PC1 must take the route:
PC2 -> R2 -> R1 -> PC1
* We need to make R2 -> R1 (Cost-B) the best (lowest cost) route for return traffic.
* Assign Cost-B = 10 (low cost).
* This ensures that R2 prefers the direct path R2 -> R1 instead of R2 -> R3 -> R1 (which costs
20+20=40).
# Traffic follows: PC2 -> R2 -> R1 -> PC1
Final Cost Assignments for Correct Routing Behavior:
Cost
Assigned Value
Reason
Cost-A (R1 -> R2)
50
High to discourage direct R1->R2 routing
Cost-B (R2 -> R1)
10
Low to ensure PC2->PC1 prefers direct R2->R1
Cost-C (R1 -> R3)
20
Medium to encourage R1->R3->R2 path
Key Takeaways:
* Higher OSPF cost discourages path selection.
* Lower OSPF cost encourages path selection.
* By manipulating OSPF cost values, we achieve asymmetric routing between PC1 and PC2.
* This aligns with OSPF path selection principles covered in HCIP-Datacom certification.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* Huawei HCIP-Datacom Official Certification Guide, Chapter on OSPF Cost Calculation and Path Selection.
* Huawei Enterprise Networking Training Materials, OSPF Path Optimization Techniques.
* Huawei Datacom Configuration Guide, OSPF Cost and Traffic Engineering.
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.
* R1 adds a community attribute (1:1) to the route before advertising it to its peers.
* All routers are configured to propagate community attributes.
* R3 is configured with a routing policy that rejects routes with the community attribute 1:1.
In this case, which of the following is the path for traffic from R3 to 192.168.1.0/24?
* 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.
* R1 adds a community attribute (1:1) to the route before advertising it to its peers.
* All routers are configured to propagate community attributes.
* R3 is configured with a routing policy that rejects routes with the community attribute 1:1.
In this case, which of the following is the path for traffic from R3 to 192.168.1.0/24?
정답: D
설명: (DumpTOP 회원만 볼 수 있음)
If the migration preparation is insufficient, which of the following problems may occur?
Options (Multiple Choice):
Options (Multiple Choice):
정답: A,B,C,D
설명: (DumpTOP 회원만 볼 수 있음)
On the network shown in the figure, the network administrator deploys DHCP snooping on the switch to defend against bogus DHCP server attacks.
Which of the following interfaces should be configured as the DHCP trusted interface?
Which of the following interfaces should be configured as the DHCP trusted interface?
정답: B
설명: (DumpTOP 회원만 볼 수 있음)
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?
정답: A,C
R1 and R2 use directly connected interfaces to establish an EBGP peer relationship. R1 imports 2000:: 1/128 to BGR By default, which of the following is the next hop of the route from R2 to 2000:: 1/128?
정답: C
If end-to-end QoS is configured on an MPLS network, the penultimate hop device on the MPLS network can pop MPLS labels from packets based on penultimate hop popping (PHP), so that the egress node can process packets based on the QoS priority in inner packets.
정답: B
On the network shown in the figure, an administrator first completes the routing configuration and then enables MPLS and LDP on R1, R2, and R3 and their interconnected interfaces. In this manner, traffic from PC1 to PC2 can be forwarded based on MPLS. Which of the following routing configurations can implement this function?
Options:
Options:
정답: A
설명: (DumpTOP 회원만 볼 수 있음)
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:
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:
정답: D
설명: (DumpTOP 회원만 볼 수 있음)