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| Section | Objectives |
|---|---|
| IPv6 and Network Services | - Network services
|
| BGP and Internet Routing | - Advanced BGP features
|
| Advanced Routing Protocols | - IS-IS Routing Protocol
|
| Network Design and Troubleshooting | - Enterprise network design
|
| MPLS and VPN Technologies | - VPN technologies
|
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NEW QUESTION # 102
Please match 0SPFv3LSA with its transmission range.
AS-external-LSA Autonomous system-wide intra-regional propagation
Network-1SA intra-regional spread
Answer:
Explanation:
Link LsA local link range
NEW QUESTION # 103
If users connected to a switch change frequently, you can configure port security to convert dynamic MAC addresses into sticky MAC addresses. In this way, when users change, the old bound MAC address entries can be aged out in a timely manner.
Answer: B
Explanation:
The statement is false due to a contradiction.
* Sticky MAC addresses are not aged out automatically . Once a MAC address is converted to sticky
, it is bound to the port and does not age out like dynamic MAC addresses unless manually cleared or the configuration is removed.
* If the goal is to allow MAC entries to age out when users change frequently, dynamic MAC addresses (not sticky) should be used.
# Official Reference from Huawei:
" Sticky MAC addresses are retained across restarts and do not age out. To allow MAC addresses to time out and be relearned, do not use sticky configuration. "
- [Huawei HCIA-Datacom Certification Guide - Port Security Section]
NEW QUESTION # 104 
On the OSPF network shown in the figure, the cost values of links are marked. OSPF IP FRR is enabled on R1, and the maximum load-balancing 8 command is configured in the OSPF process. Which of the following is the cost value of the route 10.0.35.0/24 in the routing table of R1?
Answer: C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
To determine the cost value of the route 10.0.35.0/24 in the routing table of R1, let ' s analyze the possible shortest paths from R1 to R3 (which owns the 10.0.35.0/24 network) based on the given OSPF link costs:
* Path 1: R1 # R2 # R3
* R1 to R2: Cost = 20
* R2 to R3: Cost = 10
* Total Cost = 20 + 10 = 30
* Path 2: R1 # R4 # R3
* R1 to R4: Cost = 10
* R4 to R3: Cost = 10
* Total Cost = 10 + 10 = 20 # (Lowest cost path)
* Path 3: R1 # R5 # R3
* R1 to R5: Cost = 10
* R5 to R3: Cost = 10
* Total Cost = 10 + 10 = 20 # (Equal-cost path)
Final Calculation:
* The two best equal-cost paths (R1 # R4 # R3 and R1 # R5 # R3) have a cost of 20.
* Since OSPF supports equal-cost multi-path (ECMP) routing and maximum load-balancing 8 is enabled, OSPF will install both routes into the routing table with the same cost of 20.
* The path R1 # R2 # R3 has a higher cost (30) and will not be chosen.
Final Answer: # 20 (Option C)
References:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - OSPF Route Calculation & Load Balancing OSPF Equal-Cost Multi-Path (ECMP) and Route Selection OSPF Fast Reroute (FRR) Mechanism
NEW QUESTION # 105
In the network shown in the figure, PC1 and PC2 are required to belong to the same VLAN, but cannot communicate at Layer 2. Which of the following technologies can be used to achieve this?
(Multiple choice)
Answer: B,D
NEW QUESTION # 106
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?
Answer: B
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding the BGP Network Topology in the Question:
* BGP Peering & Route Distribution
* Each router forms EBGP peer relationships with directly connected neighbors.
* R1 and R4 import the static route 192.168.1.0/24 into BGP and advertise it to their peers.
* Community attributes are attached to routes to influence routing policies.
* Effect of Community Attribute 1:1
* R1 marks 192.168.1.0/24 with community 1:1 before advertising it.
* R3 has a policy that rejects any routes with community attribute 1:1.
* Since R1's advertisement contains 1:1, R3 will not accept 192.168.1.0/24 from R2.
Route Selection and Traffic Flow Analysis:
* R1 advertises 192.168.1.0/24 with community 1:1 to R2.
* R3 rejects this route from R2 because of the configured routing policy.
* R4 also advertises 192.168.1.0/24 to its EBGP neighbors without community 1:1.
* R5 learns the route from R4 and advertises it to R3.
* Since R5's advertisement does not include community 1:1, R3 accepts the route from R5.
* Thus, the best available path for R3 to reach 192.168.1.0/24 is R3 # R5 # R1.
# Correct Path: R3 # R5 # R1
Checking Each Option:
# Option A: R3 # R2 # R4 (Incorrect)
* R3 does not learn the route from R2 because it rejects community 1:1.
* Since R1 added 1:1, and R2 propagated the same community, R3 will not accept this path.
# Option B: R3 does not have a route to 192.168.1.0/24 (Incorrect)
* R3 does have a route, but it learns it from R5 instead of R2.
# Option C: R3 # R2 # R1 (Incorrect)
* R1 marked the route with 1:1, and R2 advertised it with the same community.
* Since R3 rejects 1:1 routes, it will not use this path.
# Option D: R3 # R5 # R1 (Correct)
* R5 learns the route from R4, which does not have community 1:1, and advertises it to R3.
* R3 accepts this route and forwards traffic to R5, which sends it to R1.
Final Conclusion:
# D. The correct path for traffic from R3 to 192.168.1.0/24 is R3 # R5 # R1.
Thus, the correct answer is: D.
NEW QUESTION # 107
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