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Huawei HCIP-Datacom-Core Technology V1.0 H12-821 Dumps in PDF

Free Huawei H12-821 Real Questions (page: 9)

H12-821 PDF — 464 Questions

Which of the following statements regarding OSPF is true?

  1. OSPF does not have an acknowledgement mechanism. Therefore, OSPF relies on the upper-layer protocol,
    TCP, for acknowledgement.
  2. OSPF performs LSDB update every 30 minutes.
  3. OSPF uses the Bellman-Ford algorithm, and each router independently runs this algorithm.
  4. OSPF floods an LSU packet at an interval of 5s.

Answer(s): C

Explanation:

OSPF uses the Dijkstra algorithm (also known as SPF, Shortest Path First) for path calculation.
However, Bellman-Ford is the basis for algorithms like RIP. Despite the terminology confusion, OSPF routers independently calculate their best paths based on the Dijkstra algorithm, which is different from Bellman- Ford. This is an important distinction in routing algorithms.



Which of the following statements regarding the OSPF protocol is false?

  1. Each OSPF router uses only one Router-LSA to describe the local active connection status of an area.
  2. Routing information can be advertised only between backbone and non-backbone areas and cannot be advertised directerly between non-backbone areas.
  3. Router-LSA describes four connection types: P2P, TransNet, SubNet, and virtual link.
  4. Link State ID in a Type 3 LSA indicates the router ID of an ABR.

Answer(s): C

Explanation:

Router-LSAs (Type 1 LSAs) describe three types of connections:
1. Point-to-Point (P2P): Used for point-to-point links.
2. Broadcast (or NBMA): Used for broadcast or NBMA (Non-Broadcast Multi-Access) networks.
3. Stub (or external): For stub network connections.
The term "TransNet" does not apply to Router-LSAs, and "SubNet" and "virtual link" are not connection types for Router-LSAs. The virtual link is used for OSPF backbone connectivity, but it is not a connection type described by Router-LSAs.



This configuration is the part of RTA configuration.
Which of the following statements regarding the configuration are true? (Choose all that apply.)

[RTA]ospf 100
[RTA-ospf-100]silent-interface GigabitEthernet
/0

  1. RTA cannot establish a neighbor relationship with the neighbor that this interface is directly connected to.
  2. GigabitEthernet
    /0 is prohibited from sending OSPF packets.
  3. Direct routes of GigabitEthernet
    /0 can still be advertised.
  4. This interface cannot send Hello packets.

Answer(s): A,B,D

Explanation:

RTA cannot establish a neighbor relationship with the neighbor that this interface is directly connected to.
Since silent-interface disables OSPF Hello packet exchange, the neighbor relationship cannot be established on GigabitEthernet
/0. The OSPF process on RTA will not attempt to form an OSPF adjacency on this interface.
GigabitEthernet
/0 is prohibited from sending OSPF packets.
With the silent-interface command, OSPF packets (including Hello packets and LSAs) will not be sent on this interface, effectively prohibiting OSPF communication over it.
This interface cannot send Hello packets.
The silent-interface command specifically prevents Hello packets from being sent on the interface, which is necessary to establish OSPF neighbor relationships. As a result, OSPF Hello packets are not sent on GigabitEthernet
/0.



In the OSPF protocol, intra-area route calculation involves only Router LSA, Network LSA, and Summary LSA.

  1. TRUE
  2. FALSE

Answer(s): B

Explanation:

In OSPF (Open Shortest Path First), intra-area route calculation refers to the process of calculating routes within a single OSPF area. However, the route calculation process involves more than just the Router LSA, Network LSA, and Summary LSA.
Router LSAs (Type 1 LSAs): Describes the router's directly connected links and their states, used within the area to establish topological information.
Network LSAs (Type 2 LSAs): Generated by the Designated Router (DR) on broadcast and non-

broadcast networks, advertising the routers connected to that network.
Summary LSAs (Type 3 LSAs): These are used to advertise routes between areas, and are not used in intra-area routing. They are part of inter-area route propagation, not intra-area calculation.
For intra-area routing, the Type 1 (Router LSA) and Type 2 (Network LSA) are the key LSAs involved. Type 3 LSAs (Summary LSAs) are used for inter-area routing between different OSPF areas and do not play a role in the intra-area routing calculation.



Which of the following statements regarding OSPF multi-instance is false?

  1. Route exchange between different OSPF processes is similar to route exchange between different routing protocols.
  2. An interface of a router belongs to only a certain OSPF process.
  3. The OSPF process IDs must be the same when OSPF neighbor relationships are established between different routers.
  4. Multiple OSPF processes can run on the same router, and they are independent of each other.

Answer(s): C

Explanation:

The OSPF process ID is local to the router and is used to identify a specific OSPF process on that router.
Neighbor relationships in OSPF are not dependent on matching process IDs. As long as the routers have matching OSPF network types, area IDs, and other configuration parameters (such as authentication), OSPF neighbors can form regardless of process IDs.



In an OSPF routing domain, two routers must be specified as one DR and one BDR in a broadcast or NBMA

network with at least two routers.

  1. TRUE
  2. FALSE

Answer(s): A

Explanation:

In OSPF (Open Shortest Path First), Designated Router (DR) and Backup Designated Router (BDR) are elected on broadcast or NBMA (Non-Broadcast Multi-Access) networks to reduce the number of OSPF adjacencies and LSAs (Link-State Advertisements) exchanged, improving scalability and efficiency.
In a broadcast or NBMA network, OSPF requires one router to be elected as the DR and one as the BDR.
DR: The router that is responsible for generating and distributing LSAs for the segment.

BDR: The router that stands by in case the DR fails.

When there are at least two routers on such networks, the DR and BDR roles must be assigned. This ensures that the network can handle OSPF traffic efficiently, with the DR acting as the central point for exchanging routing information.
Key Points:
At least two routers are required for DR/BDR election.

DR and BDR are essential in broadcast and NBMA networks, but not required in point-to-point networks.

Thus, the statement is TRUE.



Four routers run IS-IS and have established adjacencies. The area IDs and router levels are marked in the following figure. R1 and R2 are connected through a PPP link, and R3 is the DIS.
Which of the following statements are true? (Choose all that apply.)

  1. If R2 sends a Level-2 LSP, R3 needs to send a PSNP for acknowledgment.
  2. R3 periodically sends CSNPs to implement Level-2 LSDB synchronization.
  3. R2 sends an LSP to R3 and R4 in unicast mode.
  4. If R1 sends an LSP, R2 needs to send a PSNP for acknowledgment.

Answer(s): A,B,D

Explanation:

If R2 sends a Level-2 LSP, R3 needs to send a PSNP for acknowledgment.
True: In IS-IS, on broadcast networks (such as the link involving R2, R3, and R4), LSP acknowledgments are achieved using Partial Sequence Number Packets (PSNPs).
When R2 sends a Level-2 LSP, R3 (the DIS) sends a PSNP as an acknowledgment.
R3 periodically sends CSNPs to implement Level-2 LSDB synchronization.
True: The DIS (Designated Intermediate System), in this case, R3, periodically sends Complete Sequence Number Packets (CSNPs) to synchronize the Level-2 Link-State Database (LSDB) on the broadcast network.
If R1 sends an LSP, R2 needs to send a PSNP for acknowledgment.
True: On the point-to-point (PPP) link between R1 and R2, IS-IS uses PSNPs for acknowledging received LSPs.



Four routers run IS-IS and have established adjacencies. The area IDs and router levels are marked in the following figure.
Which of the following statements is true?

  1. The LSDB of R2 does not contain the LSP of R4.
  2. The LSDB of R1 does not contain the LSP of R4.
  3. The LSDB of R2 does not contain the LSP of R3.
  4. The LSDB of R3 does not contain the LSP of R4.

Answer(s): B

Explanation:

In IS-IS, routers maintain separate Link-State Databases (LSDBs) for Level-1 and Level-2 areas. The behavior is based on the hierarchy and level of the routers:
1. R1 (Level-1 in Area 49.0001):
R1 is a Level-1 router and operates only within its local area (49.0001).

It does not maintain information about destinations or routers in other areas, such as Area 49.0004 where

R4 resides.
Therefore, R1's LSDB does not contain the LSP of R4.

2. R2 (Level-1-2 in Area 49.0001):
R2 is a Level-1-2 router, meaning it connects both Level-1 and Level-2 areas.

As a Level-2 router, R2 maintains LSDB entries for all Level-2 routers, including R3 and R4.

3. R3 (Level-2 in Area 49.0003):
R3 is a Level-2 router and participates in the inter-area routing of IS-IS.

It maintains LSDB entries for other Level-2 routers, including R4.

4. R4 (Level-2 in Area 49.0004):
R4 advertises its LSP to other Level-2 routers, such as R3 and R2, but not to Level-1 routers in other areas like R1.



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A
AI Tutor Explanation
5/10/2026 12:51:57 AM

Which statement is true about using default environment variables? The environment variables can be read in workflows using the ENV: variable_name syntax. The environment variables created should be prefixed with GITHUB_ to ensure they can be accessed in workflows The environment variables can be set in the defaults: sections of the workflow The GITHUB_WORKSPACE environment variable should be used to access files from within the runner.
Correct answer: The statement "The GITHUB_WORKSPACE environment variable should be used to access files from within the runner." is true.
Why the others are false:

  • ENV: variable_name syntax is not how you read env vars in workflows. Use ${{ env.VARIABLE }} in expressions or $VARIABLE in a shell.
  • Environment variables don’t need a GITHUB_ prefix. Custom vars can have any name; GITHUB_ is only for built-in, predefined vars.
  • defaults: cannot set environment variables. It configures defaults for run steps (like shell or working-directory), not env vars.

Extra tip:
  • GITHUB_WORKSPACE (or ${{ github.workspace }}) is the root path on the runner where the repository is checked out. Use it to access files, e.g., $GITHUB_WORKSPACE/... or ${{ github.workspace }}/....

New Delhi, India
A
AI Tutor Explanation
5/7/2026 11:34:48 PM

As an administrator for this subscription, you have been tasked with recommending a solution that prohibits users from copying corporate information from managed applications installed on unmanaged devices. Which of the following should you recommend? Windows Virtual Desktop. Microsoft Intune. Windows AutoPilot. Azure AD Application Proxy.

  • Microsoft Intune

Reason: Intune can enforce app protection policies (MAM) on managed apps, even on unmanaged devices, to prevent data leakage (e.g., restricting copy/paste, saving to non-approved apps, etc.). The other options don’t address data protection within apps on unmanaged devices.

Oslo, Norway
A
AI Tutor Explanation
5/4/2026 2:43:10 AM

Question 34:

  • Question 34 asks: Which role(s) has the capability to create Policies? Choose two.
  • Likely correct roles: Compliance Manager and Compliance admin (A and B). These roles typically have policy governance rights to create and manage policies.
  • Why not the others: Compliance User is usually a limited user, not allowed to create policies. Risk Manager focuses on risks, not policy creation in standard setups.
  • Note on the provided key: The answer shown is “C” (Compliance User), which conflicts with “Choose two.” This is probably a key error. In practice, verify against your instance’s ACLs or official docs.
  • Quick check tip: In ServiceNow, review the ACLs and role permissions for the Policy records to see which roles can create policies.

New Delhi, India
A
AI Tutor Explanation
4/29/2026 11:59:58 PM

function of appnav in sdwan

  • AppNav (Application Navigation) is the Cisco SD-WAN feature that provides application-level visibility and control.
  • It maintains a catalog of applications (AppIDs) with attributes (ports/protocols, categories) and classifies traffic accordingly.
  • It allows policy authors to reference apps by name in policies, enabling application-aware routing, QoS, and service chaining based on the app’s requirements.
  • The SD-WAN fabric uses AppNav data to steer traffic along the best path, improving user experience for critical apps while optimizing WAN usage.

Sydney, Australia
A
AI Tutor Explanation
4/29/2026 5:25:25 AM

Question 1:

  • Correct answer: C. Extract the hardware ID information of each computer to a CSV file and upload the file from the Microsoft Intune admin center.

  • Why this is correct

Durban, South Africa
A
AI Tutor Explanation
4/29/2026 5:23:14 AM

Question 5:

  • Correct answer: A. User4 and User1 only

  • Why this is correct:
- The Automatic Enrollment setting in Intune has MDM user scope: GroupA. Only users in GroupA can enroll devices via MDM auto-enrollment. - Device6 will be enrolled via Windows Autopilot and Intune, so enrollment is allowed only for users in GroupA. - Based on the group memberships in the scenario, User4 and User1 are in GroupA, while User2 and User3 are not. Therefore only User4 and User1 can enroll Device6.
  • Quick tip for the exam:
- Remember: MDM user scope determines who can auto-enroll devices; MAM scope controls app protection enrollment. When a new Autopilot device is enrolled, the signing-in user must be in the MDM scope.

Durban, South Africa
A
AI Tutor Explanation
4/29/2026 5:17:10 AM

Why this is correct

  • Correct answer: C. Extract the hardware ID information of each computer to a CSV file and upload the file from the Microsoft Intune admin center.

  • Why this is correct:
- Windows Autopilot requires devices to be registered by their hardware IDs (hash) before Autopilot can deploy Windows 10 Enterprise. - Collect the hardware IDs from the new Phoenix machines, save them in a CSV, and upload that CSV in the Intune/Windows Autopilot area. This maps each device to an Autopilot deployment profile. - After registration, you can assign Autopilot profiles (Windows 10 Enterprise, etc.). Other options (serial number CSV, generalizing, or Mobility settings) are not the initial Autopilot registration steps.

Durban, South Africa
A
AI Tutor Explanation
4/25/2026 1:53:46 PM

Question 7:

  • Correct answer: B — A risk score is computed based on the number of remediations needed compared to the industry peer average.

Explanation:
  • Risk360 uses a remediation-based score. It benchmarks how many actions are required to fix issues against peers, giving a relative risk posture.
  • Why not the others:
- A: Not just total risk events by location. - C: Time to mitigate isn’t the primary scoring method. - D: Not a four-stage breach scoring approach.
Note: The page text shows a mismatch (it lists D as the answer), but the study guide describes the remediation-based scoring (B) as the correct concept.

New Delhi, India
A
AI Tutor Explanation
4/25/2026 1:42:20 PM

Question 104:

  • Correct answer: D) Multi-Terabyte (TB) Range

  • Brief explanation:
- clustering keys organize data into micro-partitions to improve pruning when queries filter on those columns. - The performance benefit is most significant for very large tables; for small tables the overhead of maintaining clustering outweighs gains. - Therefore, as a best practice, define clustering keys on tables at the TB scale.

Thane, India
C
Community Helper
4/25/2026 2:03:10 AM

Q23: Fabric Admin is correct. Because Domain admin cannot create domains. Only Fabric Admin can among the given options. Q51: Wrapping @pipeline.parameter.param1 inside {} will return a string. But question requires the expression to return Int, so correct answer should be @pipeline.parameter.param1 (no {})

New Delhi, India
A
AI Tutor Explanation
4/23/2026 3:07:03 PM

Question 62:

  • Correct answer: D (per the page)

  • Note: The explanation text on the page describes option B (use ZDX score and Analyze Score to trigger the Y Engine analysis), indicating a mismatch between the stated answer and the rationale.

  • Key concept: For fast root-cause analysis, leverage telemetry and auto-correlated insights:
- Use the user’s ZDX score for AWS and run Analyze Score to activate the Y Engine, which correlates metrics across network, client, and application to pinpoint the issue quickly.
  • Why the other options are less effective:
- A: Only checks for outages; doesn’t provide actionable root-cause analysis. - C: Deep Trace helps visibility but is manual and time-consuming. - D: Packet capture is invasive and slow; not the quickest path to root cause.

Coimbatore, India
A
AI Tutor Explanation
4/23/2026 12:26:21 PM

Question 32:

  • Answer: A (2.4GHz)

  • Why: Lower-frequency signals have longer wavelengths and experience less attenuation when passing through walls and obstacles. Higher frequencies (5GHz, 6GHz) are more easily blocked by walls. NFC operates over very short distances and is not meant to penetrate walls. So 2.4 GHz best penetrates physical objects like walls.

Allen, United States
A
AI Tutor Explanation
4/21/2026 8:48:36 AM

Question 3:

  • False is the correct answer (Option B).

Why:
  • In Snowflake, a database is a metadata object that exists within a single Snowflake account. Accounts are isolated—there isn’t one database that lives in multiple accounts.
  • You can access data across accounts via data sharing or database replication, but these create separate database objects in the other accounts (e.g., a database in the consumer account created from a share), not a single shared database across accounts.

So a single database cannot exist in more than one Snowflake account.

Thane, India
A
Anonymous User
4/16/2026 10:54:18 AM

Question 1:

  • Correct answer: E — date = sys.argv[1]
  • Why this is correct:
- When a Databricks Job passes parameters to a notebook, those parameters are supplied to the notebook's Python process as command-line arguments. The first argument after the script name is sys.argv[1], so date = sys.argv[1] captures the passed date value directly.
  • How it compares to other options:
- date = spark.conf.get("date") reads from Spark config, not from job parameters. - input() waits for user input at runtime, which isn’t how job parameters are provided. - date = dbutils.notebooks.getParam("date") would work if the notebook were invoked via dbutils.notebook.run with parameters, not

Innisfil, Canada
A
Anonymous User
4/15/2026 4:42:07 AM

Question 528:

  • Correct answer: NSG flow logs for NSG1 (Option B)

  • Why:
- Traffic Analytics uses NSG flow logs to analyze traffic patterns. You must have NSG flow logs enabled for the NSGs you want to monitor. - An Azure Log Analytics workspace is also required to store and query the traffic data. - Network Watcher must be available in the subscription for traffic analytics to function.
  • What to configure (brief steps):
- Ensure Network Watcher is enabled in the East US region (for the subscription/region). - Enable NSG flow logs on NSG1. - Ensure a Log Analytics workspace exists and is accessible (read/write) so Traffic Analytics can store and query logs.
  • Why other options aren’t correct:
- “Diagnostic settings for VM1” or “Diagnostic settings for NSG1” alone don’t guarantee flow logs are captured and sent to Log Analytics, which Traffic Analytics relies on. - “Insights for VM1” is not how Traffic Analytics collects traffic data.

Hamburg, Germany
A
Anonymous User
4/15/2026 2:43:53 AM

Question 23:
The correct answer is Domain admin (option B), not Fabric admin.

  • Domain admin provides domain-level management: create domains/subdomains and assign workspaces within those domains, which matches the tasks while following least privilege.
  • Fabric admin is global-level access and is more privileges than needed for this scenario (it would grant broader control across the Fabric environment).

Kottayam, India
A
Anonymous User
4/14/2026 12:31:34 PM

Question 2:
For question 2, the key concept is the Longest Prefix Match. Routers pick the route whose subnet mask is the most specific (largest prefix length) that still matches the destination IP.
From the options:

  • A) 10.10.10.0/28 ? 10.10.10.0–10.10.10.15
  • B) 10.10.13.0/25 ? 10.10.13.0–10.10.13.127
  • C) 10.10.13.144/28 ? 10.10.13.144–10.10.13.159
  • D) 10.10.13.208/29 ? 10.10.13.208–10.10.13.215

The destination Host A’s IP must fall within 10.10.13.208–10.10.13.215 for the /29 to be the best match. Since /29 is the longest prefix among the matching options, Router1 will use 10.10.13.208/29.
Thus, the correct answer is D.

Canada
S
srameh
4/14/2026 10:09:29 AM

Question 3:

  • Correct answer: Phase 4, Post Accreditation

  • Explanation:
- In DITSCAP, the four phases are: - Phase 1: Definition (concept and requirements) - Phase 2: Verification (design and testing) - Phase 3: Validation (fielding and evaluation) - Phase 4: Post Accreditation (ongoing operations and lifecycle management) - The description—continuing operation of an accredited IT system and addressing changing threats throughout its life cycle—fits the Post Accreditation phase, which covers operations, maintenance, monitoring, and reauthorization as threats and environment evolve.

France
O
onibokun10
4/13/2026 7:50:14 PM

Question 129:
Correct answer: CNAME

  • A CNAME record creates an alias for a domain, so newapplication.comptia.org will resolve to whatever IP address www.comptia.org resolves to. This ensures both names point to the same resource without duplicating the IP.
  • Why not the others:
- SOA defines authoritative information for a zone. - MX specifies mail exchange servers. - NS designates name servers for a zone.
  • Notes: The alias name (newapplication.comptia.org) should not have other records if you use a CNAME for it, and CNAMEs aren’t used for the zone apex (root) domain. This scenario uses a subdomain, so a CNAME is appropriate.

Swindon, United Kingdom
A
Anonymous User
4/13/2026 6:29:58 PM

Question 1:

  • Correct answer: C

  • Why this is best:
- Uses OS Login with IAM, so SSH access is granted via Google accounts rather than distributing per-user SSH keys. - Granting the compute.osAdminLogin role to a Google group gives admin access to all team members in a centralized, auditable way. - Access is auditable: Cloud Audit Logs show who accessed which VM, satisfying the security requirement to determine who accessed a given instance.
  • How it works:
- Enable OS Login on the project/instances (enable-oslogin metadata). - Add the team’s

Germany
A
Anonymous User
4/13/2026 1:00:51 PM

Question 2:

  • Answer: D. Azure Advisor

  • Why: To view security-related recommendations for resources in the Compute and Apps area (including App Service Web Apps and Functions), you use Azure Advisor. Advisor surfaces personalized best-practice recommendations across resources, including security, and shows which resources are affected and the severity.

  • Why not the others:
- Azure Log Analytics is for ad-hoc querying of telemetry, not for viewing security recommendations. - Azure Event Hubs is for streaming telemetry data, not for security recommendations.
  • Quick tip: In the portal, navigate to Azure Advisor and check the Security recommendations for App Services to see actionable items and affe

    Brazil
D
Don
4/11/2026 5:36:42 AM

Recommend using AI for Solutions rather the Answer(s) submitted here

Hamburg, Germany
M
Mogae Malapela
4/8/2026 6:37:56 AM

This is very interesting

Gaborone, Botswana
A
Anon
4/6/2026 5:22:54 PM

Are these the same questions you have to pay for in ExamTopics?

Amsterdam, The Netherlands
L
LRK
3/22/2026 2:38:08 PM

For Question 7 - while the answer description indicates the correct answer, the option no. mentioned is incorrect. Nice and Comprehensive. Thankyou

Paris, France
R
Rian
3/19/2026 9:12:10 AM

This is very good and accurate. Explanation is very helpful even thou some are not 100% right but good enough to pass.

United States
G
Gerrard
3/18/2026 6:58:37 AM

The DP-900 exam can be tricky if you aren't familiar with Microsoft’s specific cloud terminology. I used the practice questions from free-braindumps.com and found them incredibly helpful. The site breaks down core data concepts and Azure services in a way that actually mirrors the real test. As a resutl I passed my exam.

United States
V
Vineet Kumar
3/6/2026 5:26:16 AM

interesting

Anonymous
J
Joe
1/20/2026 8:25:24 AM

Passed this exam 2 days ago. These questions are in the exam. You are safe to use them.

UNITED STATES
N
NJ
12/24/2025 10:39:07 AM

Helpful to test your preparedness before giving exam

Anonymous
A
Ashwini
12/17/2025 8:24:45 AM

Really helped

Anonymous
J
Jagadesh
12/16/2025 9:57:10 AM

Good explanation

INDIA
S
shobha
11/29/2025 2:19:59 AM

very helpful

INDIA
P
Pandithurai
11/12/2025 12:16:21 PM

Question 1, Ans is - Developer,Standard,Professional Direct and Premier

Anonymous
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