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Huawei H12-821_V1.0 (HCIP-Datacom-Core Technology V1.0) certification exam is designed for individuals who wish to become proficient in datacom core network technologies. HCIP-Datacom-Core Technology V1.0 certification exam is part of the Huawei HCIP-Datacom certification track and is a prerequisite for the HCIE-Datacom certification. H12-821_V1.0 Exam Tests the candidate's knowledge and skills in various areas such as network architecture, advanced routing protocols, MPLS VPN, and network security.

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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q111-Q116):

NEW QUESTION # 111
Which of the following values is the Reserved/Circuit Type field in the IIH packets sent by a Level-1-2 router on an IS-IS network?

A. 0
B. 01
C. 1
D. 00

Answer: A

Explanation:
Comprehensive and Detailed In-Depth Explanation:
* Intermediate System to Intermediate System (IS-IS) routers send IS-to-IS Hello (IIH) packets to establish neighbor relationships.
* The Reserved/Circuit Type field in IIH packets indicates which level of IS-IS adjacency the router is trying to establish:
* 00 # Level-0 (Not used in IS-IS).
* 01 # Level-1 router.
* 10 # Level-2 router.
* 11 # Level-1-2 router (Both levels supported).
* Since the question asks for the field value in an L1-L2 router's IIH packets, the correct answer is 11 (B).
# Reference: Huawei HCIA-Datacom Study Guide, IS-IS Neighbor Discovery and IIH Packet Format.

NEW QUESTION # 112
In IPv6, NDP (Neighbor Discovery Protocol) uses multiple types of ICMPv6 packets. Which of the following functions are RS (Router Solicitation) packets used for?

A. Prefix readdressing
B. Address resolution
C. Redirection
D. Duplicate address detection

Answer: B

Explanation:
Comprehensive and Detailed In-Depth Explanation:
* Neighbor Discovery Protocol (NDP) replaces ARP in IPv6 and uses ICMPv6 messages for:
* Router Solicitation (RS) # Sent by hosts to request Router Advertisement (RA) messages.
* Router Advertisement (RA) # Sent by routers to announce prefixes and network parameters.
* Neighbor Solicitation (NS) # Used for address resolution and Duplicate Address Detection (DAD).
* Neighbor Advertisement (NA) # Sent in response to NS messages.
* Redirect # Used by routers to redirect hosts to better gateways.
* RS is not directly used for address resolution; Neighbor Solicitation (NS) does this, so the answer should be D.
# Reference: Huawei HCIA-Datacom Study Guide, NDP and ICMPv6 Packet Types.

NEW QUESTION # 113
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. 10.1.4.0/24
B. 10.1.2.0/24
C. 10.1.1.0/24
D. 10.1.3.0/24

Answer: A,B,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 # 114
Security policy is the core feature of firewalls. Only valid traffic that complies with security policies can be forwarded by firewalls. Which of the following statements are true about security policy matching rules?

A. The system has a default security policy named default, where all matching conditions are any and the default action is permit.
B. When multiple security policy rules are configured, they are sorted in a list by configuration sequence by default. A security policy rule configured earlier is placed higher in the list and has a higher priority.
C. Multiple values can be configured for a single matching condition, and the values are logically ANDed.
D. If a security policy contains multiple matching conditions, the relationship between them is AND.

Answer: B,D

Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
1. How Firewalls Match Security Policies:
* Firewalls use security policies to define rules for filtering traffic.
* Each policy contains matching conditions (e.g., source IP, destination IP, protocol, etc.) and an action (e.g., permit or deny).
* Traffic is evaluated against these policies in sequential order, and the first matching policy is applied.
2. Analysis of Each Statement:
Option A: Multiple values can be configured for a single matching condition, and the values are logically ANDed.
* Incorrect.
* Multiple values for a single matching condition (e.g., multiple source IPs) are logically ORed, not ANDed. For example, traffic from any of the specified source IPs matches the policy.
Option B: If a security policy contains multiple matching conditions, the relationship between them is AND.
* Correct.
* When a policy has multiple matching conditions (e.g., source IP AND destination IP AND protocol), all conditions must be met for the policy to match.
Option C: The system has a default security policy named default, where all matching conditions are any and the default action is permit.
* Incorrect.
* The default security policy typically denies all traffic unless explicitly permitted by user-defined policies.
Option D: When multiple security policy rules are configured, they are sorted in a list by configuration sequence by default. A security policy rule configured earlier is placed higher in the list and has a higher priority.
* Correct.
* Security policies are processed in sequential order based on their configuration sequence. Policies configured earlier have higher priority and are evaluated first.
3. Summary:
* The correct statements are B and D.

NEW QUESTION # 115
As shown in the figure, data traffic is forwarded in tunnel mode along the path of STA -> HAP -> HAC -> upper-layer network before roaming. What is the flow direction of data traffic after Layer 3 roaming?

A. STA -> FAP -> FAC -> HAC -> HAP -> Upper-layer network
B. STA -> FAP -> FAC -> HAC -> HAP -> HAC -> Upper-layer network
C. STA -> FAP -> FAC -> HAC -> Upper-layer network
D. STA -> FAP -> FAC -> Upper-layer network

Answer: C

Explanation:
After Layer 3 roaming, the STA's traffic is forwarded from the Foreign AP (FAP) to the Foreign AC (FAC), and then to the Home AC (HAC) before reaching the upper-layer network. This ensures that the STA remains on the same subnet without breaking existing sessions .

NEW QUESTION # 116
......

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