Community Q&A
H12-811-V2.0 — frequently asked questions
Community-vetted answers to 15 common questions about this exam, each traced back to a specific practice question.
Questions from real practice questions
Each Q&A comes from a specific question — follow the link for the full analysisNAPT vs Easy IP: Do Both Use Multiple Public Addresses?
Does Easy IP use a public address pool?
No. Easy IP is a special NAPT form that uses the public IP address of the outbound interface, allowing many private hosts to share that single address.
Why is the statement false if NAPT translates port numbers?
Port translation is only one part. The false part is claiming Easy IP shares multiple public addresses; Easy IP has no public address pool and maps all sessions to one interface address.
Can generic NAPT use multiple public addresses?
Generic NAPT can be configured with an address pool and port translation, but the question bundles it with Easy IP, which is restricted to a single public interface address.
Is Huawei ssh client first-time enable Always Required?
Does a Huawei SSH client always fail on first login without ssh client first-time enable?
No. The login can succeed if the server’s public key has been manually imported or was already saved on the client; the command only enables automatic first-time key acceptance.
What does the ssh client first-time enable command do on Huawei devices?
It allows the SSH client to accept and save the SSH server’s public key automatically when connecting for the first time, simplifying initial authentication.
When is ssh client first-time enable actually required?
It is needed when the client has no saved or preconfigured public key for the server and you want the first connection to proceed by automatically trusting and storing that key.
AAA Accounting Tracks Traffic and Duration, Not Only Fees
What does AAA accounting actually record?
It records session and resource-usage information such as start and stop times, duration, traffic volume, and commands, depending on the AAA server and network access server. Those records may feed billing, auditing, or reporting.
Does AAA accounting always mean billing?
No. Billing is one application; accounting primarily provides usage data for auditing, security, capacity planning, and compliance.
Why is the statement that accounting records only fees false?
Because AAA accounting captures usage detail such as traffic and connection duration even when no fee is calculated. Fees are a downstream business use of those records.
PFC Working Principles: Which Statements Are False?
Does PFC wait until the receive buffer is full before sending a pause frame?
No. PFC sends an XOFF pause frame when the per-priority buffer usage crosses a configured threshold, leaving headroom before the buffer is actually full.
When does the receiver send a PFC resume frame?
When receive buffer usage falls below the lower XON threshold, not only after the buffer is completely cleared; this resumes the paused priority.
Why is option D not one of the false statements?
D describes the resume side of PFC: after backpressure starts, the receiver sends the control frame that stops the pause once the buffer drops to the configured lower extent.
Huawei Leader AP Architecture: Which Statements Are True?
Why is option D false if the leader AP manages Fit APs?
The member APs are Fit APs, but the leader AP takes the AC/WAC role rather than being a Fit AP managed by an external controller. The statement confuses the manager with the managed devices.
Does Huawei leader AP networking require an external DHCP server?
No. The leader AP can serve as a DHCP server for STAs in small deployments, although an external DHCP server can also be used depending on the design.
What protocol does the leader AP use to manage member APs?
CAPWAP, the control protocol used between an AC and Fit APs; the leader AP sends configurations over CAPWAP to the member Fit APs.