Huawei H12-821_V1.0 Exam - Topic 2 Question 97 Discussion

Actual exam question for Huawei's H12-821_V1.0 exam

Question #: 97
Topic #: 2

Typically, a protocol that occupies two ports during communication is called a multi-channel protocol. For such protocols, the ASPF function must be enabled on the firewall to ensure smooth setup of the data channel and reduce the risk of attacks. Which of the following protocols is not a multi-channel protocol?

AFTP

BSIP

CSMTP

DH.323

H323 (D): A VoIP protocol using multiple channels.
Single-Channel Protocol:
SMTP (C): A single-channel protocol for email communication, which does not require ASPF.

Show Suggested Answer

Suggested Answer: C

Comprehensive and Detailed Step-by-Step

Multi-Channel Protocols:

Multi-channel protocols use separate channels for control and data communication, requiring application-specific packet filtering (ASPF) to track sessions.

Examples:

FTP (A): Uses separate control and data channels.

SIP (B): Uses multiple ports for signaling and media.

HCIA-Datacom Study Guide, Chapter: Firewall ASPF Configuration

Huawei Multi-Channel Protocol Handling

by Nelida at May 13, 2026, 08:30 PM

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