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問題 #90
Compared with Wi-Fi 6, Wi-Fi 7 uses which of the following technologies to improve performance?
答案：A,B,C,D
解題說明：
Huawei ' s Wi-Fi 7 documentation describes several technologies introduced or enhanced relative to Wi-Fi 6 to increase throughput, spectrum efficiency, and reduce latency. 4096-QAM raises modulation density from the 1024-QAM maximum associated with Wi-Fi 6, allowing more bits to be carried per modulation symbol under suitable radio conditions. Multi-RU allows one user to be assigned multiple resource units, improving spectrum scheduling flexibility compared with the Wi-Fi 6 restriction of a user operating within its assigned RU. Multi-link operation allows a station to establish and use links across multiple bands or radios as a coordinated connection. Wi-Fi 7 also enhances MU-MIMO capabilities, increasing the ability to serve multiple users and exploit additional spatial resources. Huawei product documentation commonly lists 4096- QAM, multi-RU, MLO/multi-link, and enhanced MU-MIMO among Wi-Fi 7 improvements built on Wi-Fi 6.
Therefore, each technology listed in the question contributes to Wi-Fi 7 performance improvement, and the verified selection is A, B, C, and D.
問題 #91
Which of the following DHCPv4 messages are sent by a DHCPv4 server?
答案：B,C
解題說明：
The normal DHCPv4 address-allocation exchange is commonly summarized as DORA: Discover, Offer, Request, and Acknowledge. A DHCP client that needs configuration begins by sending DHCPDISCOVER to locate available DHCP servers. A server responds with DHCPOFFER, proposing an address and other parameters. The client then sends DHCPREQUEST to indicate the offered address and server it has selected.
Finally, the selected DHCP server sends DHCPACK to confirm the lease and deliver the final configuration.
Therefore, DHCPDISCOVER and DHCPREQUEST are client-originated messages in the standard allocation process, while DHCPOFFER and DHCPACK are server-originated messages. DHCP also defines other messages for lease renewal, decline, release, and negative acknowledgment, but those are not among the answer choices. For the options provided, A, DHCPACK, and D, DHCP OFFER, are the messages sent by a DHCPv4 server. The verified answer is A and D. This server-versus-client message direction is fundamental when interpreting DHCP packet captures and troubleshooting address-allocation failures on enterprise campus access networks.
問題 #92
On an enterprise network, SW1 and SW2 are connected through an Eth-Trunk in LACP mode.
The administrator sets the minimum number of active links to 3 on SW1. However, there are only two physical links between the two switches and the links are normal. Which of the following statements are true about this scenario? (Choose all that apply.)
答案：A,B
解題說明：
In LACP mode, an Eth-Trunk requires the number of active member links to meet the minimum active link threshold to stay up. Here, SW1 is configured with a minimum of 3 active links, but only
2 physical links exist. Since the requirement cannot be satisfied, the Eth-Trunk interface will go down.
However, the physical interfaces themselves remain in an up state at Layer 1 because the physical links are normal and operational; only the aggregation logic is affected, not the physical link status.
Therefore, the Eth-Trunk is down, while the two physical interfaces are still up.
問題 #93
Which of the following protocols cannot be used for accounting between an AAA client and an AAA server?
答案：C,D
解題說明：
RADIUS and HWTACACS are AAA protocols that support accounting functions in addition to authentication and authorization. Accounting records can be used to track login sessions, service usage, command activity, or other information required by the deployment. LDAP and Microsoft Active Directory, by contrast, are directory-based identity technologies. Huawei documentation describes LDAP/AD integration primarily for authentication and authorization by querying directory information and validating user credentials. They are not used as the native AAA accounting protocol between a Huawei AAA client and an AAA server in the same way as RADIUS or HWTACACS. Therefore, when the question asks which listed protocols cannot be used for accounting between the AAA client and AAA server, AD and LDAP are the appropriate selections. RADIUS explicitly carries accounting messages, and HWTACACS also separates and supports authentication, authorization, and accounting functions. The source file leaves the answer blank, but the Datacom AAA model supports a verified answer of B and D.
問題 #94
Which of the following configurations can enable connectivity between interfaces on R1 and R3? (Select all that apply)
答案：B,C
解題說明：
For two directly connected edge networks to communicate through intermediate routing, each end router must have a route to the remote destination network pointing to the correct next hop on the transit link. Since
10.0.0.0/24 is directly connected to R1 and 20.1.1.0/24 is directly connected to R3, R1 needs a route to
20.1.1.0/24, and R3 needs a route to 10.0.0.0/24.
Option A is correct because it configures on R1 a static route to the remote network 20.1.1.0/24 using next hop 10.0.0.2, which is the neighbor toward the transit path. Option D is correct because it configures on R3 a static route to the remote network 10.0.0.0/24 using next hop 20.1.1.1, which is the proper adjacent forwarding address in that direction. Option B is incorrect because a router cannot use a next hop that belongs to the remote destination network but is not directly reachable as a valid immediate forwarding address in this topology. Option C is also incorrect because the specified next hop is not the correct adjacent next-hop address for R3. HCIA-Datacom stresses that static routes must always point to a reachable next hop or outbound interface.
問題 #95
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