Pass the Huawei HCIE-Datacom H12-891_V1.0 Questions and answers with Dumpstech

Comprehensive and Detailed In-Depth Explanation:

When invoking RESTful APIs in iMaster NCE-Campus, the client must include the ACCESS-TOKEN in the request header to authenticate the request.

The ACCESS-TOKEN is obtained through authentication and is required for API access control.

The correct format in the HTTP header is:

Authorization: Bearer ACCESS-TOKEN

Other formats like ACCEPT-TOKEN, X-ACCEPT-TOKEN, and X ACCESS TOKEN are not recognized or valid for iMaster NCE-Campus API requests.

Therefore, the correct answer is A.

In OSPF (Open Shortest Path First), routers connected over broadcast networks (like Ethernet) elect a Designated Router (DR) and Backup Designated Router (BDR). DR election is based on the interface priority. If the priority is set to 0, the router cannot become a DR or BDR.

When both routers have a priority of 0, no DR or BDR will be elected, and since the election fails, the neighbor relationship between the two routers will not advance beyond the 2-Way state. In this state, the routers acknowledge each other but do not exchange routing information in detail (as they only form full adjacency with the DR/BDR).

Therefore, the OSPF neighbor relationship remains in the 2-Way state.

Comprehensive and Detailed In-Depth Explanation:

An HTTP response from the server to the client typically includes the following components:

Protocol version (C): Specifies the HTTP version used (e.g., HTTP/1.1).

Status code (B): Indicates the response result (e.g., 200 for OK, 404 for Not Found).

Reason phrase (A): A textual description associated with the status code (e.g., " OK " , " Not Found " ).

Headers and Body: Contain additional information and the actual response content.

URI (D): The Uniform Resource Identifier is part of the HTTP request and not the HTTP response. Therefore, D is the correct answer.

Huawei’s user access authentication configuration includes the following components:

AAA scheme: Defines how users are authenticated (local, RADIUS, HWTACACS, etc.).

Domain: Groups users and associates them with an AAA scheme.

Access profile: Defines access control rules like 802.1X, MAC, Portal, or multi-mode authentication.

Correct workflow:

Bind the authentication profile (which references the access profile) to the user access interface.

Not the other way around.

Incorrect statement:

D. It incorrectly states you bind the access profile to the authentication profile, when in fact, the authentication profile binds the access profile and is applied to the interface.

Correct answer: D

Huawei AR routers used as egress gateways in CloudCampus solutions support multiple onboarding and deployment methods, including:

DHCP Option 148-based auto-deployment

Web-based management

CLI-based deployment and configuration (also supported)

So, the statement is incorrect—CLI-based deployment is supported.

Exact Extract - Huawei CloudCampus AR Router Deployment Guide:

“AR series routers support multiple deployment methods including CLI, DHCP Option 148, and web-based registration.”

In MPLS (Multiprotocol Label Switching), Label Switching Routers (LSRs) handle packets based on FECs (Forwarding Equivalence Classes) and their positions in the label-switched path:

Ingress LSR: The entry point for labeled packets; it classifies packets into FECs and assigns the initial label.

Transit LSR: Intermediate routers that swap labels and forward packets along the LSP.

Egress LSR: The last router in the LSP that removes the label and forwards the packet normally.

An LSR cannot be both an ingress and a transit router for the same FEC, because an ingress LSR is defined as the starting point for that specific FEC ' s LSP. If it’s the ingress, it means the labeled path starts there, so it can ' t be in the middle (transit) of that same path.

Therefore, the statement is FALSE.

Comprehensive and Detailed In-Depth Explanation:

In VXLAN encapsulation, the data frame is encapsulated as follows:

Original Ethernet Frame: The data packet to be encapsulated.

VXLAN Header: Contains the VXLAN Network Identifier (VNI) and other information.

UDP Header: VXLAN uses UDP (User Datagram Protocol) to transport the encapsulated data over an IP network.

Outer IP Header: Provides the source and destination IP addresses of the VTEPs.

Therefore, the UDP header (C) is encapsulated between the outer IP header and the VXLAN header.

In OSPFv3 (used for IPv6), Link LSAs (Type 8) are not advertised throughout the entire area. Instead, they are only advertised on a specific link (i.e., the local link). This differs from OSPFv2, where LSAs like Type 1 or Type 2 are advertised across the area.

Exact Extract - Huawei HCIE-Datacom V1.0 Courseware - Chapter: OSPFv3 Operation

“Link LSAs are generated by routers for each attached link and sent only on that link, not flooded throughout the area.”

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