HCIP-Datacom H12-821_V1.0 Huawei Study Notes

By default, Huawei firewalls create security zones named untrust , dmz , trust , and local . These zones facilitate security policies for inbound, outbound, and inter-zone traffic control ​.

Comprehensive and Detailed Step-by-Step Explanation:

Portal Authentication:

Portal authentication uses a web-based mechanism where clients are redirected to a login page.

Communication between the access device and Portal server uses HTTP or HTTPS protocols.

Correct Statements:

Option A: HTTP or HTTPS is used for Portal authentication.

Option D: Portal protocol packets are transmitted over TCP for reliable communication.

Incorrect Statements:

Option B: Port 2000 is not the default for processing Portal packets.

Option C: The default destination port for communication with the Portal server is not 50100.

Comprehensive and Detailed In-Depth Explanation:

AS_Path is a well-known mandatory attribute (not discretionary).

AS_Path characteristics :

A. TRUE → When advertising to IBGP peers, AS_Path remains unchanged to prevent routing loops.

B. TRUE → BGP uses AS_Path to detect loops (if a router sees its own AS in the path, it rejects the route).

C. FALSE → AS_Path is well-known mandatory, not discretionary .

D. TRUE → BGP ignores AS_Confed_Sequence and AS_Confed_Set when calculating the AS_Path length.

???? Reference: Huawei HCIA-Datacom Study Guide, BGP Path Attributes and Loop Prevention.

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 ​.