HUAWEI H12-821_V1.0 TEST COLLECTION PDF & FREE PDF UNPARALLELED HCIP-DATACOM-CORE TECHNOLOGY V1.0

Huawei H12-821_V1.0 Test Collection Pdf & Free PDF Unparalleled HCIP-Datacom-Core Technology V1.0

Huawei H12-821_V1.0 Test Collection Pdf & Free PDF Unparalleled HCIP-Datacom-Core Technology V1.0

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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q126-Q131):

NEW QUESTION # 126
An enterprise administrator wants to configure single-hop BFD to implement fast detection of direct links.
Which of the following configurations are mandatory?

  • A. Configure a multicast IP address for BFD.
  • B. Configure the remote discriminator of a BFD session.
  • C. Enable BFD globally.
  • D. Configure the local discriminator of a BFD session.

Answer: B,C,D

Explanation:
For single-hop BFD (Bidirectional Forwarding Detection), the configuration must include the local and remote discriminators to uniquely identify the session endpoints. Additionally, enabling BFD globally is a prerequisite for initiating BFD sessions. Configuring multicast IP addresses is unnecessary for single-hop BFD, as it operates over direct links. Huawei's configuration guidelines specify these requirements to ensure effective deployment and operation of BFD.
Understanding BFD (Bidirectional Forwarding Detection):
* BFD is a protocol used to detect link faults quickly between two routers.
* Single-hop BFD operates on directly connected links and is commonly used for fast fault detection in routing protocols like OSPF and BGP.


NEW QUESTION # 127
Which of the following statements is false?

  • A. If the current DR fails, the current BDR automatically becomes a new DR, and a BDR will be elected again.
  • B. A device with a higher router priority has a higher election priority.
  • C. When a router with the highest router priority joins an OSPF network, this router will become the new DR.
  • D. If two devices have the same router priority, the device with a larger router ID has a higher election priority.

Answer: C

Explanation:
The election of a Designated Router (DR) and Backup Designated Router (BDR) occurs during the OSPF network's initial setup or upon the failure of an existing DR. A new router joining an OSPF network does not automatically preempt the current DR, even if it has the highest priority. DR and BDR elections are not preemptive. The other statements are correct regarding OSPF DR/BDR election processes .


NEW QUESTION # 128
On an STP network, the root bridge, root port, and designated port are elected in sequence. The election rules of these ports are different. List the steps for electing the root port in sequence.

Answer:

Explanation:

Explanation:
The sequence of steps for electing the root port in an STP (Spanning Tree Protocol) network is as follows:
* Bridge ID Comparison: The Bridge ID (BID) is compared between the bridges in the network. A smaller value indicates a higher priority, meaning the bridge with the lowest Bridge ID is elected as the root bridge.
* RPC (Root Path Cost) Comparison: The path cost to reach the root bridge is calculated. The router with the lowest Root Path Cost (RPC) to the root bridge will have a higher priority for the election of the root port.
* Peer BID Comparison: If there is a tie in the Root Path Cost, the Peer BID is compared. A smaller Peer BID indicates a higher priority. This step ensures that if two routers have the same RPC, the one with the lower Peer Bridge ID wins.
* Local BID Comparison: If there is still a tie, the Local BID is compared. A smaller Local BID indicates a higher priority. This final step ensures that the router with the lowest local identifier is selected.
* Bridge ID Comparison:The first step in electing the root port is comparing the Bridge IDs. The bridge with the lowest Bridge ID becomes the root bridge. The Bridge ID is made up of the bridge priority and MAC address. The root bridge is the center of the network for STP, and all other ports will calculate their paths based on this root.


NEW QUESTION # 129
On an OSPF network, if a router functions as an ABR, the router must also be a BR.

  • A. TRUE
  • B. FALSE

Answer: B

Explanation:
Comprehensive and Detailed in-depth Step-by-Step Explanation:To answer this question, we need to understand the roles of OSPF routers:
* Area Border Router (ABR):
* An ABR is a router that connects multiple OSPF areas. It has at least one interface in the backbone area (Area 0) and one or more interfaces in other OSPF areas.
* The ABR performs summarization between areas and propagates routing information between them.
* Backup Router (BR):
* The term "BR" does not exist in OSPF terminology. Instead, OSPF uses the term "Backup Designated Router (BDR)." The BDR is a backup to the Designated Router (DR) in a specific OSPF broadcast or NBMA (Non-Broadcast Multi-Access) network. The BDR takes over the DR's responsibilities if the DR fails.
Key Clarification:
* An ABR is related to the hierarchical structure of OSPF areas and is not tied to the DR/BDR election process.
* A router can function as an ABR without ever being a DR or BDR, as these are separate roles.
Therefore, the statement that an ABR must also be a BR is FALSE.
References:
* Huawei HCIA-Datacom Study Guide, Chapter on "OSPF Fundamentals".
* RFC 2328 - OSPF Version 2.
* Huawei OSPF Configuration Guide.


NEW QUESTION # 130
On the OSPF network shown in the figure, an adjacency has been established between R1 and R2. An engineer configures the commands in the figure on R2. In this case, which of the following routing entries may exist in the routing table of R2?

  • A. 10.1.2.0/24
  • B. 10.1.1.0/24
  • C. 10.1.3.0/24
  • D. 10.1.4.0/24

Answer: A,C,D

Explanation:
Configuration Analysis:
* On R2, the following configuration has been applied:acl 200rule deny source 10.1.0.0 0.0.3.0rule permit#ospf 1filter-policy 2000 import On R2, the following configuration has been applied:acl 200rule deny source 10.1.0.0 0.0.3.0rule permit#ospf 1filter-policy 2000 import On R2, the following configuration has been applied:acl 200rule deny source 10.1.0.0 0.0.3.0rule permit#ospf 1filter-policy 2000 import On R2, the following configuration has been applied:acl 200rule deny source 10.1.0.0 0.0.3.0rule permit#ospf 1filter-policy 2000 import On R2, the following configuration has been applied:acl 200rule deny source 10.1.0.0 0.0.3.0rule permit#ospf 1filter-policy 2000 import On R2, the following configuration has been applied:acl 200rule deny source 10.1.0.0 0.0.3.0rule permit#ospf 1filter-policy 2000 import On R2, the following configuration has been applied:acl 200rule deny source 10.1.0.0 0.0.3.0rule permit#ospf 1filter-policy 2000 import On R2, the following configuration has been applied:acl 200rule deny source 10.1.0.0 0.0.3.0rule permit#ospf 1filter-policy 2000 import
* This configuration uses ACL 200 to filter routes during import into the OSPF routing table on R2.
* Rule deny source 10.1.0.0 0.0.3.0: Blocks routes in the range 10.1.0.0/24 to 10.1.3.0/24 (inclusive).
* Rule permit: Allows all other routes to be imported.
* Impact of ACL 200 on Route Import:
* 10.1.0.0/24 to 10.1.3.0/24: These subnets are explicitly denied by ACL 200 and will not appear in R2's routing table.
* 10.1.4.0/24 and beyond: These subnets are permitted by the rule permit statement and will be imported into R2's routing table.
* Routing Table Entries on R2:
* Option A (10.1.4.0/24): Exists in R2's routing table because it is permitted.
* Option B (10.1.3.0/24): Does not exist because it is denied by ACL 200.
* Option C (10.1.2.0/24): Does not exist because it is denied by ACL 200.
* Option D (10.1.1.0/24): Does not exist because it is denied by ACL 200.
* A (10.1.4.0/24)
Correct Options:References:
* HCIA-Datacom Study Guide, Chapter: OSPF Route Filtering
* Huawei ACL Configuration for Route Policies


NEW QUESTION # 131
......

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