H12-891_V1.0 Exam Dumps : HCIE-Datacom V1.0

Huawei’s Network Access Control (NAC) Portal authentication supports various identity authentication methods for user login via a web page. These include:

Username and password — standard method.

Passcode — one-time password or PIN.

SMS verification code — users receive a dynamic code via SMS for identity verification.

However:

MAC address authentication is used in MAC-based authentication, not Portal. MAC authentication allows a device to be authenticated using its MAC address without user interaction (i.e., not via a Portal page).

Correct answer: D. User’s MAC address

The basic constructs in YANG data modeling include:

Leaf node – A single data element with a specific type (e.g., integer, string).

List node – A repeating set of elements, each structured the same.

Incorrect options:

A. Set node – ❌ Not a valid YANG construct.

D. Tree node – ❌ Not an individual data model element. The entire model forms a tree structure, but there is no “tree node” in YANG syntax.

Exact Extract – Huawei YANG Modeling Fundamentals:

“YANG defines elements such as leaf, list, container, choice, and leaf-list. ' Set ' and ' tree ' are not YANG node types.”

Comprehensive and Detailed In-Depth Explanation:

The IP prefix list configuration:

ip ip-prefix TEST permit 10.0.0.0 24 less-equal 30

10.0.0.0/24: Matches because it falls within the 10.0.0.0/24 prefix with the same prefix length (24).

10.0.1.0/24: Matches because it also falls within the /24 network range.

10.0.2.0/24: Matches for the same reason as the above.

10.0.0.1/30: Matches because it falls within the /24 prefix and its subnet length (30) is within the less-equal 30 range.

The prefix list permits any route that falls within the 10.0.0.0/24 network with a subnet mask ranging from /24 to /30. Therefore, all given routes are matched.