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It Contains a pool of real Huawei H12-811_V2.0 exam questions. This HCIA-Datacom V2.0 (H12-811_V2.0) practice test is compatible with every windows-based system. One downloaded does not require an active internet connection to operate. You can self-evaluate your mistakes after each H12-811_V2.0 Practice Exam attempt and work on the weak points that require more attention.
NEW QUESTION # 47
When Telnet or the web system is used to manage a device, which of the following mechanisms can be deployed to allow only fixed user IP addresses to log in to the device?
Answer: C
Explanation:
An Access Control List (ACL) can filter packets based on specified matching conditions, including source and destination IP addresses.
Huawei ' s HCIA-Datacom training material explains that ACLs provide traffic classification and access- control capabilities.
To restrict remote management access, an administrator can configure ACL rules that permit connections originating from authorized management IP addresses and deny connections from other sources.
The ACL must be applied to the appropriate management service or user interface for the restrictions to take effect.
Option A is incorrect because telemetry is primarily used for collecting and reporting operational data.
Option C is incorrect because SNMP is designed for network monitoring and management rather than implementing the specified login-source filtering mechanism.
Option D provides authentication, authorization, and accounting, but it is not the direct mechanism requested for filtering specific source IP addresses.
Therefore, option B is correct.
NEW QUESTION # 48
On the network shown in the figure, S2 serves as a DHCP server and has four address pools, R1 functions as a DHCP relay agent, and S1 is a DHCP client. Which of the following IPv4 addresses can be assigned to S1 through DHCP?
Answer: B
Explanation:
S1 is a DHCP client and will receive an IP address from the DHCP server S2 via the relay agent R1. The DHCP server has multiple pools, and only the pool matching the client-side network of S1 (192.168.1.0/24) applies. Therefore, the only valid address that can be assigned to S1 must come from the 192.168.1.0/24 subnet. Among the options, only 192.168.1.108/24 belongs to that correct address pool.
NEW QUESTION # 49
Which of the following phases are required for establishing a connection between an SSH server and an SSH client? (Select all that apply)
Answer: A,B,C,D
Explanation:
The establishment of an SSH connection includes multiple mandatory phases that ensure both secure communication and authenticated access. First, the SSH client and server perform version negotiation to determine a mutually supported SSH protocol version. Then they carry out algorithm negotiation, during which they agree on the encryption algorithm, key exchange algorithm, integrity algorithm, and other security parameters to be used for the session.
After that, the peers perform key exchange, which is used to derive shared session keys securely over an insecure network. This stage is essential because it enables subsequent communication to be encrypted and protected against interception. Finally, once the secure channel has been established, user authentication is performed so that the server can verify the identity of the client user. This can be done using a password, public key, or other supported authentication method.
Therefore, all four options are required phases in the SSH connection establishment process.
HCIA-Datacom emphasizes these steps because SSH is a core secure management protocol used to replace insecure protocols such as Telnet and FTP in modern network operation and maintenance.
NEW QUESTION # 50
On a switched network where STP is enabled on all devices, when a downstream device detects a topology change, it continuously sends configuration BPDUs to the upstream device until the root bridge is informed of the topology change.
Answer: B
Explanation:
In STP, topology change information is propagated via TCN (Topology Change Notification) BPDUs, not by continuously sending configuration BPDUs. When a change is detected, the switch sends TCN BPDUs toward the root bridge through the upstream path, and the root bridge then informs the network using configuration BPDUs with updated flags. The behavior described is therefore incorrect.
NEW QUESTION # 51
R1 has the following configurations:
[R1] nat address-group test 1
[R1-address-group-test] section 1 100.1.23.1 100.1.23.254
[R1-address-group-test] mode pat
[R1-address-group-test] quit
[R1] nat-policy
[R1-policy-nat] rule name test
[R1-policy-nat-rule-test] source-address range 192.168.0.0 192.168.255.255
[R1-policy-nat-rule-test] action source-nat address-group test
[R1-policy-nat-rule-test] quit
[R1-policy-nat] quit
[R1] interface GE 0/0/2
[R1-GE0/0/2] nat enable
[R1-GE0/0/2] quit
Which of the following statements is false ?
Answer: A
Explanation:
Option C is false. In this configuration, the NAT address group test contains the public address range
100.1.23.1 to 100.1.23.254 , and the address group works in PAT mode . Port Address Translation allows multiple different intranet users to share the same public IP address while being distinguished by different transport-layer port numbers. Therefore, intranet users with different private IP addresses do not have to use different post-NAT public IP addresses.
Option A is true because 100.1.23.254 is included in the configured public address pool and can be used for source NAT. Option B is also true because NAT is enabled on GE0/0/2 , so if user traffic does not leave through that interface, the NAT policy may not be applied and public access may fail. Option D is true because the configured source address range includes 192.168.1.100, which falls within 192.168.0.0 to
192.168.255.255. HCIA-Datacom teaches that NAT behavior depends on matching traffic, address pools, PAT or no-PAT mode, and the interface where NAT is enabled. This question mainly tests understanding of source NAT and PAT address-sharing behavior.
NEW QUESTION # 52
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