Free Huawei H12-811_V2.0 Practice Exam with Questions & Answers | Set: 4

DHCP automatically assigns IP configuration parameters to network clients. During initial address acquisition, a DHCP client broadcasts a DHCPDISCOVER message to locate available DHCP servers.

Ethernet switches normally forward these broadcasts only within the originating VLAN.

In this scenario, PC1 belongs to VLAN 2, while PC2 and the DHCP server belong to VLAN 3. The trunk connection permits traffic from both VLANs but maintains their Layer 2 isolation.

Therefore, DHCP broadcasts generated by PC1 in VLAN 2 cannot directly reach the DHCP server in VLAN 3.

PC2 can obtain an address because it shares the DHCP server ' s broadcast domain.

Communication between these VLANs would require Layer 3 forwarding, and DHCP relay functionality would normally be required to forward DHCP requests across the VLAN boundary.

Consequently, the administrator ' s explanation is correct.

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ACL 2001 is a basic IPv4 ACL because Huawei numbered basic ACLs use the range 2000 to 2999. A basic ACL can match relatively simple conditions such as source IP address and an effective time range, but it does not support matching the IP protocol, destination IP address, or TCP/UDP source and destination port numbers. The attempted rule includes tcp, destination-port eq telnet, and a destination network, all of which require an advanced ACL. Huawei advanced ACLs use the 3000 to 3999 range and can match protocol type, source and destination addresses, and Layer 4 port values. Therefore, even after correcting the obvious command typo from ad 2001 to acl 2001, the rule syntax is still incompatible with a basic ACL 2001 and cannot be successfully configured in that ACL view. To implement the intended policy, the administrator should create an advanced ACL and express the TCP Telnet and destination conditions there. Consequently, the statement that the rule cannot be configured successfully is TRUE, option A.

Option D is correct. The AAA configuration binds the domain huawei.com to the authentication scheme auth1, which uses RADIUS as the authentication mode, and to the accounting scheme acc1, which also uses RADIUS. Therefore, when a user logs in with a user name in the format hcia-datacom@huawei.com, the device parses the suffix @huawei.com, matches the domain, and applies the configured RADIUS authentication method.

Option A is false because RADIUS does support accounting, and UDP port 1813 is commonly used for that purpose. Option B is false because a separate authorization server IP is not strictly required in this context; RADIUS can carry authorization attributes together with authentication/accounting processing depending on server behavior and device configuration. Option C is false because standard RADIUS communication uses UDP, not TCP, with authentication typically on port 1812 and accounting on 1813. HCIA-Datacom teaches domain-based AAA processing as a key concept, where the user name suffix determines which authentication, authorization, and accounting policies are applied on the NAS device.

Huawei uses DHCP Option 148 for IPv4-based plug-and-play or zero-touch deployment of devices to iMaster NCE-Campus. The DHCP server can include controller information in this vendor-specific option, allowing a switch, router, or cloud-managed AP to obtain the southbound address or URL of iMaster NCE-Campus together with the required management port. After the device receives normal addressing information and the Option 148 parameters, it can reach the controller and establish the management channel, including NETCONF-based management in supported deployment scenarios. Huawei documentation distinguishes this from IPv6 deployment, where Option 17 can be used for equivalent controller discovery. The Option 148 value commonly carries fields such as the controller management mode, domain or IP address, and management port. This removes the need to manually enter controller information on every new device and is widely used in iMaster NCE-Campus onboarding workflows. Therefore, the numeric value required in the blank is 148, matching the source answer and Huawei campus deployment documentation.

A router performing conventional IP forwarding processes information primarily at the network layer and data link layer. Therefore, options A and D are correct.

At the data link layer, the router receives an Ethernet frame, examines its Layer 2 information, removes the incoming Ethernet encapsulation, and prepares a new Layer 2 frame for transmission through the outgoing interface.

At the network layer, the router examines the destination IP address, searches its routing table, selects an outgoing interface or next hop, and decreases the IPv4 Time to Live (TTL). It also updates the IPv4 header checksum.

The router does not normally examine HTTP application content or modify TCP transport information when performing standard routing. Those operations belong to higher-layer processing or additional services.

The HCIA-Datacom forwarding model distinguishes routing functions from transport-layer and application-layer processing.

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VTY interfaces provide remote terminal sessions to the device. The command protocol inbound all allows the interactive remote-login protocols supported by that VTY implementation, notably Telnet and SSH/STelnet. FTP is not a VTY terminal-login protocol. FTP is a file-transfer service that uses its own server/client process, TCP sessions, authentication, and file system permissions; enabling FTP service does not make an FTP user consume a VTY terminal line in the same manner as a Telnet or SSH CLI session. Therefore, even though the word all broadens the VTY ' s permitted terminal access protocols, it does not mean that FTP users log in through those five VTY interfaces. Huawei troubleshooting documentation specifically treats protocol inbound all as satisfying Telnet and SSH access requirements. The statement incorrectly groups FTP with the VTY login protocols and claims that all three types of users can use the five VTY interfaces. That conclusion is false. The verified answer is B.

This statement is true. On a Huawei WAC, the number of APs that can go online is controlled by the available license resources. If a Fit AP fails to come online and the command display ap online-fail-record shows Insufficient license resources, it means the controller does not currently have enough licensed capacity to allow additional APs to register successfully.

In this case, the administrator must expand the license capacity or adjust existing license allocation so that the AP can be admitted. This is a common WLAN deployment issue, especially when new APs are added without first verifying the current AP license limit on the WAC. HCIA-Datacom troubleshooting methodology emphasizes interpreting controller diagnostics and fault records accurately. An AP can fail to go online for many reasons, including CAPWAP reachability problems, version mismatch, authentication issues, or licensing limitations. When the failure reason explicitly indicates insufficient license resources, the troubleshooting direction is clear: the controller’s AP license capacity must be checked and, if necessary, increased. This question tests the ability to map a specific WAC alarm record to the correct operational response.

1) a = 3; 2) b = a + 3; 3) c = a + b; 4) print(add(a, b, c))

The statements must be executed in dependency order. The function add(a, b, c) can be called only after values have been assigned to the variables that are passed as its three arguments. First, a must be set to 3. The next statement, b = a + 3, depends on a already existing, so it must follow the assignment to a. The statement c = a + b depends on both a and b, so it must be executed after b has been calculated. Finally, print(add(a, b, c)) can run only after a, b, and c all have valid values. With this order, a equals 3, b equals 6, and c equals 9. The function therefore returns 3 + 6 + 9, and print displays 18. Executing the statements in another order would attempt to reference an undefined variable and raise a NameError. The correct sequence is: a = 3, b = a + 3, c = a + b, then print(add(a, b, c)).

A Fat AP integrates both wireless access functions and the control or management functions needed to provide WLAN service. It can therefore operate independently without a separate wireless access controller (WAC). This architecture is practical for small deployments in which only a few APs are required and centralized policy control, large-scale roaming optimization, and unified configuration are not major requirements. Typical examples include homes, small offices, and small retail locations. In contrast, a Fit AP is designed to work under a WAC, with many management and control functions centralized on the controller. That model scales better for enterprise and campus networks containing many APs. Huawei also supports cloud-managed designs in which management functions are provided through a cloud or controller platform, but that does not change the fundamental distinction between traditional Fat and Fit architectures. Because the question states that a Fat AP can provide user access without being managed by a WAC and is suitable for small scenarios, the statement accurately describes the Fat AP model. The correct answer is TRUE, option A.

In Huawei WAC + Fit AP networking, APs must discover the WAC before establishing CAPWAP tunnels.

The HCIA-Datacom V2.0 training material explains that DHCP Option 43 can deliver the WAC ' s IP address to Fit APs during DHCP address assignment.

In the exhibit, SW2 has VLAN 100 configured, permits VLAN 100 through the trunk interface, and enables DHCP address allocation through VLANIF 100.

Therefore, the VLAN and DHCP interface configuration are present.

However, DHCP Option 43 is missing. Because the WAC and Fit APs communicate across Layer 3 boundaries, broadcast-based WAC discovery cannot operate across those boundaries.

Without another configured discovery method, the APs cannot discover the WAC and establish their CAPWAP connections.

Consequently, option C identifies the missing configuration.

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