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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network O&M | 7% | - Routine maintenance - Data collection |
| Topic 2: Advanced Ethernet Technologies | 10% | - VLANs - Ethernet security |
| Topic 3: Advanced IGP Features | 17% | - Fast convergence - IS-IS advanced features - OSPF advanced features - Route control |
| Topic 4: Advanced BGP Features | 10% | - Inter-domain routing optimization - Advanced BGP features - Route reflectors - BGP route control |
| Topic 5: Network Troubleshooting | 10% | - Structured troubleshooting processes - Troubleshooting methods |
| Topic 6: IPv6 Routing | 20% | - BGP4+ - IPv6 static routes - IS-IS for IPv6 - OSPFv3 |
| Topic 7: Network Cutover | 7% | - Basic cutover concepts - Migration process |
| Topic 8: MPLS Technologies | 19% | - MPLS forwarding - MPLS principles - MPLS VPN applications - MPLS configuration |
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NEW QUESTION # 62
On the OSPFv3 network shown in the figure:
OSPFv3 is enabled on the interfaces connecting R1, R2, and R3. The router ID of each router is
10.0.X.X, where X is the number of the router. If you check detailed information about an LSA on R3, the command output shows that the LSA is generated by R2 and describes the IPv6 prefix address associated with the Router-LSA.
Is this statement TRUE or FALSE?
Answer: A
NEW QUESTION # 63
What is wrong with this configuration description is:
[Huawei]dhcp enable
[Huaweijinte GigabitEthernet 0/0/1 [Huawei-GigabitEthernet0/0/1 ]dhcp option82 insert en [Huawei-GigabitEthernet0/0/1 ]dhcp snooping enable [Huawei-GigabitEthernet0/0/1]dhcp snooping trusted
Answer: B
NEW QUESTION # 64
In the hub-spoke networking shown in the figure, to ensure correct route transmission , an administrator must manually configure the peer 10.1.2.1 _____ command in the IPv4 address family view of the BGP- VPN_out instance on the Hub-PE .
( Enter the answer in lowercase letters only. )
Answer:
Explanation:
next-hop-self
Explanation:
To determine the correct command, we need to analyze BGP behavior in a Hub-Spoke topology and how routes are advertised in MPLS VPN environments .
1. Understanding the Hub-Spoke BGP/MPLS VPN Topology
* The network consists of Hub-PE and Spoke-PE routers , which are MPLS VPN PEs .
* Hub-PE is responsible for distributing routes between Spoke-PE1 and Spoke-PE2 .
* Spoke routers do not have direct IBGP peering with each other ; instead, they rely on the Hub-PE to relay routes .
* BGP next-hop handling is critical for proper route advertisement .
2. Why is the " next-hop-self " Command Required?
* By default, when BGP advertises a route , the next-hop remains unchanged (i.e., the original next- hop is retained).
* In Hub-Spoke topology , Spoke routers would receive routes with a next-hop IP that belongs to another Spoke-PE , which is not reachable directly .
* To solve this issue, we use the next-hop-self command on the Hub-PE , so that:
* Hub-PE updates the next-hop to its own address before advertising routes to the Spoke-PEs.
* This ensures that Spoke-PE routers use the Hub-PE as the next-hop , making routes reachable and preventing blackholing .
3. Correct Command Usage
The administrator must run the following command under the BGP IPv4 address family of the BGP- VPN_out instance on Hub-PE :
shell
CopyEdit
peer 10.1.2.1 next-hop-self
This ensures that the next-hop for advertised routes is changed to the Hub-PE ' s IP , allowing proper route transmission in the Hub-Spoke MPLS VPN environment .
NEW QUESTION # 65
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?
Answer: A
Explanation:
A super-VLAN provides a shared Layer 3 gateway for its associated sub-VLANs, but the sub-VLANs remain separate broadcast domains. Because hosts in different sub-VLANs commonly use addresses from the same IP subnet, they initially attempt direct ARP resolution. The ARP broadcast cannot cross the sub-VLAN boundary. Enabling proxy ARP on the super-VLAN's VLANIF interface allows the switch to respond and then route traffic between the sub-VLANs. Therefore, option D is correct.
The other options are incorrect:
* A: The super-VLAN's VLANIF interface becomes Up only when at least one physical interface in an associated sub-VLAN is Up-not merely any physical interface on the switch.
* B: Huawei explicitly prohibits configuring VLAN 1 as a super-VLAN.
* C: Different sub-VLANs are independent broadcast domains and cannot communicate directly at Layer
2. Their communication requires Layer 3 forwarding through the super-VLAN VLANIF interface, normally assisted by proxy ARP.
Huawei also specifies that a super-VLAN contains no physical interfaces; physical interfaces belong to its sub- VLANs. Huawei Super-VLAN overview , Huawei super-VLAN restrictions
NEW QUESTION # 66
When there are multiple equal-cost routes to the same destination address, BGP equal-cost load balancing can be used to achieve the purpose of balancing traffic. However, IBGP routes and EBG routes to the same destination in the public network cannot form load balancing.
Answer: B
NEW QUESTION # 67
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