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| Section | Objectives |
|---|---|
| Topic 1: Network Fundamentals | - OSI and TCP/IP models - Basic network topologies and devices |
| Topic 2: WLAN Basics | - Wireless networking fundamentals |
| Topic 3: Routing Technologies | - Static routing - Dynamic routing fundamentals (OSPF basics) |
| Topic 4: Network Security Basics | - Access control lists (ACL) - Basic network security concepts |
| Topic 5: IP Services | - DHCP and DNS concepts - NAT basics |
| Topic 6: IP Addressing and Subnetting | - IPv4 addressing and subnet masks - IPv6 fundamentals |
| Topic 7: Network Management and Troubleshooting | - Basic troubleshooting tools and methods - Device management concepts |
| Topic 8: Switching Technologies | - STP/RSTP concepts - VLAN configuration and trunking |
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NEW QUESTION # 139
The network administrator performs the configuration shown in the figure on SW1 and SW2.
Which of the following statements are false about this scenario? (Choose all that apply.)
Answer: A,B,D
Explanation:
PC1 is in VLAN 1 and PC2 is in VLAN 3 on SW1, so they are in different VLANs and cannot communicate at Layer 2.
PC1 and PC3 are both in VLAN 1, but VLAN 1 traffic is not allowed on the trunk link, so communication between switches for VLAN 1 traffic is blocked.
PC2 is in VLAN 3 while PC3 is in VLAN 1, so they are in different VLANs and cannot communicate at Layer 2.
PC2 and PC4 are both in VLAN 3, and VLAN 3 is permitted across the trunk, so they can communicate successfully.
NEW QUESTION # 140
When deploying a WLAN on a customer ' s live network, you find that a STA fails to access the WLAN during commissioning. Which of the following are possible causes? (Select all that apply)
Answer: A,B,C,D
Explanation:
Huawei ' s HCIA-Datacom WLAN troubleshooting material identifies several causes of wireless station access failures.
Option A is correct because excessive channel utilization causes contention, retransmissions, and degraded wireless communication. The training material indicates that channel utilization exceeding approximately
85% can prevent STAs from accessing the network reliably.
Option B is correct because the WAC can deny wireless client access through blacklist-based admission control.
Option C is correct because network faults may prevent DHCP messages from reaching their destination, leaving the STA without a valid IP address and preventing successful network connectivity.
Option D is correct because a defective wireless network adapter can prevent the STA from establishing or maintaining wireless communication.
Troubleshooting should distinguish failures during scanning, authentication, association, and IP address allocation.
Therefore, all four options represent possible causes.
NEW QUESTION # 141
An enterprise has deployed a Huawei WLAN, but some STAs cannot associate with wireless signals. To troubleshoot this issue, you log in to the WAC and run related commands. The command output is as follows.
According to the command output, which of the following is the possible cause of the STA association failure?
Answer: B
Explanation:
The command output in the exhibit shows that both AP radios are enabled, so a disabled radio is not supported by the evidence. The 5 GHz radio has relatively low channel utilization, while the 2.4 GHz radio reports channel utilization of approximately 90 percent. Such a high utilization value indicates that the air interface is heavily occupied by transmissions or interference. Huawei WLAN troubleshooting guidance identifies a busy air interface and a heavily loaded AP as possible causes of STA association failures because management and authentication frames may be delayed or lost when contention is severe. The displayed radio information alone does not prove that the affected STAs are in a blacklist or absent from a whitelist; those conditions require separate STA or VAP access-control information. Therefore, option A is the only choice directly supported by the command output. The correct troubleshooting interpretation is that excessive channel utilization on the radio can make the air interface busy and prevent some STAs from completing association successfully. The verified answer is A.
NEW QUESTION # 142
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 # 143
R1 has two equal-cost routes to 10.0.12.0/24 after the following commands are configured.
[R1] ip route-static 10.0.12.0 24 10.0.12.2 preference 60
[R1] ip route-static 10.0.12.0 24 10.0.21.2 preference 60
Answer: A
Explanation:
The source key marks this statement TRUE, but the topology makes that answer technically incorrect. R1 is shown with interface address 10.0.12.1/24, which automatically installs a directly connected route to 10.0.12.0
/24. On Huawei VRP, a direct route has preference 0, whereas a static route has preference 60 unless another value is configured. The two commands do configure two static routes with the same preference, and equal- preference static routes can support load balancing when they are the best routes to a destination. Here, however, both static routes are for the same prefix that R1 already owns as a connected network. The direct route has a higher priority because its preference value is smaller, so it is selected in the active IP routing table instead of the two preference-60 static routes. Therefore the assertion that R1 has two active equal-cost routes to 10.0.12.0/24 is FALSE as the question and exhibit are written. The verified answer is B, and the original source key A should be corrected.
NEW QUESTION # 144
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