Important Huawei H12-821_V1.0 Exam Questions

Answer: A

Explanation:

When two BGP peers negotiate the Hold Time, the shorter value between the two configured Hold Time values is selected. This ensures compatibility and maintains the stability of the BGP session .

Answer: D

Explanation:

ARP spoofing is a Layer 2 attack, as it targets ARP tables in switches or end devices. All other attacks, including IP spoofing, ICMP attacks, and Smurf attacks, are network layer (Layer 3) attacks .

Answer: A

Explanation:

Comprehensive and Detailed Step-by-Step

BGP Origin Attribute Priority:

The Origin attribute determines the source of the route and affects the selection of the best path.

The priority order is as follows:

IGP (i): Highest priority. Routes injected using the network command.

EGP (e): Lower priority. Routes learned from the EGP protocol.

Incomplete (?): Lowest priority. Routes redistributed into BGP from other protocols.

Correct Option:

A: IGP > EGP > Incomplete is the correct order of priority.

HCIA-Datacom Study Guide, Chapter: BGP Path Selection

Huawei BGP Routing Rules

Answer: D

Explanation:

Comprehensive and Detailed Step-by-Step

Route Policy Overview:

A route-policy is a policy-based routing tool that filters and modifies routing information.

It consists of one or more nodes, and each node can specify match conditions and apply actions to routes.

Maximum Number of Nodes:

The maximum number of nodes supported in a route-policy is 1024, allowing flexibility in route filtering and control.

HCIA-Datacom Study Guide, Chapter: Route-Policy Configuration

Huawei Route-Policy Configuration Guidelines

Answer: A

Explanation:

By default, Huawei firewalls create security zones such as Trust, Untrust, and Local. The DMZ (Demilitarized Zone) is a security zone explicitly created by users. A DMZ is used to isolate an internal network from the external one, providing an additional layer of security by placing public-facing services (e.g., web servers) in this intermediary zone. This setup ensures that if a public-facing service is compromised, the internal network remains secure. Huawei Firewall configuration steps confirm this zoning principle, making DMZ creation an explicit user-driven action .