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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: WLAN Technology Basics | 10% | - 802.11 standards and WLAN components - Basic WLAN configuration - WLAN architecture and working principles |
| Topic 2: Network Security and Services | 15% | - AAA and basic security technologies - ACL, NAT principles and configuration - DHCP, DNS, FTP, Telnet services |
| Topic 3: Network O&M and Troubleshooting | 10% | - Network monitoring and management tools - Fault diagnosis and troubleshooting methods |
| Topic 4: Typical Campus Networking Solution | 5% | - End-to-end networking scenarios - Campus network design and integration |
| Topic 5: Data Communication Network Basics | 10% | - Basic network concepts and architecture - Data forwarding process - OSI and TCP/IP protocol models - ARP, TCP/UDP principles - Campus network basics - VRP system basics and operations |
| Topic 6: Ethernet Technology Basics | 20% | - Ethernet standards and switch principles - VLAN, STP, RSTP principles and configuration - Link aggregation and stacking technologies |
| Topic 7: IP Technology Basics | 25% | - Static routing, OSPF fundamentals - IPv6 basics - IPv4 addressing, subnetting - IP routing basics and forwarding |
| Topic 8: Data Center Network Basics | 5% | - Basic data center networking technologies - Data center architecture overview |
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NEW QUESTION # 118
The emergence of AI poses new requirements on data center networks. To meet AI computing requirements, a high-speed intelligent computing data center network with zero packet loss needs to be constructed. Which of the following statements are false about the requirements and solutions of intelligent computing data center networks? (Select all that apply)
Answer: A,D
Explanation:
The false statements are A and D. Option A is considered false in HCIA-Datacom wording because intelligent computing data center networks aim to build a lossless Ethernet fabric through coordinated technologies such as high-bandwidth interfaces, deep buffers, PFC, ECN, congestion control, and optimized forwarding. The exam-oriented knowledge point treats these technologies as solutions for a zero packet loss network design goal rather than stating that a truly lossless network cannot be achieved.
Option D is also false because RDMA is used to reduce end-to-end communication latency and CPU overhead between servers, especially for east-west traffic in AI and high-performance computing clusters. It is not specifically described as reducing latency between GPU servers and physical switches. That wording is inaccurate.
NEW QUESTION # 119
LACP is used to dynamically establish an Eth-Trunk between SW1 and SW2. Each of SW1 and SW2 has eight interfaces for aggregation, but only four links need to be active. Which of the following parameters should the administrator configure to determine the switch that is responsible for selecting active links?
Answer: A
Explanation:
In LACP, when more interfaces are available than the maximum number of active links, the device uses LACP interface priority to determine which links are selected as active. Interfaces with higher priority (lower priority value) are preferred for active forwarding.
NEW QUESTION # 120
AAA is short for authentication, authorization, and accounting. The accounting function records only the fees incurred when users use network resources, but not the Internet access traffic or duration.
Answer: B
Explanation:
The accounting function in AAA records user activity details such as login/logout times, session duration, accessed services, and traffic statistics. It is not limited to recording fees; it also tracks usage data for auditing, monitoring, and billing purposes.
NEW QUESTION # 121
The figure shows the simplified topology of an enterprise campus network. On this network, the aging time of dynamic MAC address entries on switches is 300 seconds. Employee A uses PC1 to connect to the GE1/0/1 port of the switch and continuously communicates with PC3 for 10 minutes. After that, the employee disconnects the network cable and leaves the workstation. Subsequently, PC4 continues to communicate with PC3. After 30 minutes, employee B connects PC2 to GE1/0/1 of SW1, and PC2 ' s ARP cache table is empty.
At this point, when SW1 receives an ARP request from PC2, it will search the MAC address table and forward the request packet only through GE1/0/3.
Answer: B
Explanation:
An ARP Request is carried in an Ethernet broadcast frame whose destination MAC address is FF-FF-FF-FF- FF-FF. When SW1 receives the ARP Request from PC2, it does not look up a single destination MAC entry and send the frame only toward PC3. Instead, the switch floods the broadcast frame through all other eligible ports in the same VLAN, excluding the ingress port. The 300-second MAC aging time reinforces why the earlier PC1 entry is not relevant after 30 minutes: a dynamic entry that is not refreshed will age out long before PC2 is connected. PC4 ' s continued communication with PC3 may refresh MAC entries associated with that traffic, but it does not transform PC2 ' s ARP Request into a known unicast frame. ARP relies on broadcast precisely because the sender does not yet know the target ' s Layer 2 address. Therefore, the claim that SW1 forwards the request only through GE1/0/3 is incorrect. The verified answer is FALSE, option B.
NEW QUESTION # 122
After checking the status of GE0/0/1 on R1, you obtain the command output shown below. Which of the following statements are true? (Choose all that apply.)
Answer: A,C,D
Explanation:
The interface status shows both the physical layer and line protocol are UP, confirming the physical status is UP. The output explicitly indicates PVID: 1, so the VLAN ID is 1. The hardware address field displays b0c7-8733-d65c, which is the MAC address of the interface. The port mode is COMMON COPPER, meaning it is a copper Ethernet interface rather than an optical interface, so the statement about optical type is incorrect.
NEW QUESTION # 123
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