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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Data Center Network Basics | 5% | - Data center network architecture overview - Cloud computing and virtualization basics - Data center fabric concepts (VXLAN, SDN) |
| Topic 2: Ethernet Technology Basics | 20% | - Link aggregation (LACP) - MAC address table and forwarding - VLAN principles and configuration - STP / RSTP / MSTP spanning tree protocols - VLAN intercommunication (sub-interface, VLANIF) - Ethernet overview and frame structure |
| Topic 3: Network O&M and Troubleshooting | 10% | - Common network fault diagnosis - Network documentation and baselining - Troubleshooting methodology and process - Network maintenance tools (ping, tracert, display commands) |
| Topic 4: Data Communication Network Basics | 10% | - ARP principles - Basic principles and operations of VRP (Versatile Routing Platform) - Basic network concepts, IP network architecture, and standardization organizations - OSI and TCP/IP protocol models and functions of each layer - Data forwarding process - TCP/UDP principles - Basic concepts and life cycle of campus network |
| Topic 5: Network Security and Services | 15% | - Firewall basics and security zones - FTP / TFTP and file management - IPsec VPN fundamentals - Network security overview - AAA (Authentication, Authorization, Accounting) - Network management protocols (SNMP, NTP) |
| Topic 6: Typical Campus Networking Solution | 5% | - Network reliability and redundancy design - Campus network architecture design - Hierarchical network model (core, aggregation, access) - Typical campus network deployment scenarios |
| Topic 7: IP Technology Basics | 25% | - NAT (Network Address Translation) - ACL (Access Control List) - ICMP protocol - DHCP principles and configuration - Static routing and default routing - IPv4 addressing and subnetting - IPv6 basics and address types - OSPF fundamentals (single-area) |
| Topic 8: WLAN Technology Basics | 10% | - WLAN basic configuration and troubleshooting - WLAN networking architecture (AC + AP) - WLAN RF fundamentals (channels, bands) - WLAN overview and 802.11 standards |
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NEW QUESTION # 41
OSPF supports the division of a network into areas, each identified by an area ID that ranges from 0 to 255. Area 0 is designated as the backbone area.
Answer: B
Explanation:
This statement is false because although Area 0 is indeed the backbone area, the statement about the area ID range is incorrect. In OSPF, the area ID is a 32-bit value, which can be represented either in decimal format or in IPv4 address format such as 0.0.0.0. It is not limited to the numeric range 0 to 255.
For example, an area can be configured as 0, 1, 100, or in dotted-decimal form such as 0.0.0.1 or
0.0.0.10, depending on implementation and configuration style. HCIA-Datacom teaches that OSPF uses hierarchical area design to improve scalability, reduce SPF calculation scope, and optimize LSA flooding. The backbone area, which is Area 0, serves as the transit area connecting all non-backbone areas in a standard OSPF design. Therefore, the second part of the statement is correct, but the first part is wrong, making the entire statement false. This question tests whether the learner understands both the function of Area 0 and the actual format of OSPF area identifiers.
NEW QUESTION # 42
Given the following routing table, what is the source IP address used by R1 when sending an ICMP packet to ping 10.0.3.3?
Answer: B
Explanation:
When R1 sends an ICMP echo request, it selects the outgoing interface based on the routing table. The route to 10.0.3.3 uses the next hop 10.0.23.3 via GE0/0/2. Huawei devices use the IP address of the egress interface as the source IP for locally generated packets. GE0/0/2 has the address 10.0.23.2, so this is used as the source IP.
NEW QUESTION # 43
To ensure that the same data flow can be forwarded through the same physical link in a link aggregation group (LAG) and different data flows can be load balanced among different physical links in the LAG, the administrator needs to enable per-packet load balancing on the devices at both ends of the LAG.
Answer: B
Explanation:
Per-packet load balancing is not required to ensure that the same data flow stays on the same physical link. In fact, per-packet load balancing can cause packet reordering and is generally not used for preserving flow consistency. Consistent flow-based load balancing (such as hash-based methods) is what ensures that the same data flow is always forwarded over the same member link in a LAG.
NEW QUESTION # 44
If PC1 obtains an IPv6 address through SLAAC, which of the following is the network prefix length of the address that PC1 receives?
Answer: D
Explanation:
In SLAAC (Stateless Address Autoconfiguration), IPv6 hosts always use a 64-bit interface identifier with a /64 network prefix. The router advertisement provides a /64 prefix, and the host generates the remaining 64 bits for its interface ID.
NEW QUESTION # 45
After the root bridge is elected on an STP network, which of the following parameters may be compared by ports on non-root bridge nodes to elect the root port? (Select all that apply)
Answer: A,B,C,D
Explanation:
On a non-root bridge, the root port is the port that receives the best BPDU toward the root bridge. STP selects the root port by comparing several parameters in order. The first important parameter is the root path cost (RPC) , so option B is correct. If multiple ports have the same RPC, the switch then compares the bridge ID (BID) of the upstream device sending the BPDU, making option C correct. If those are still equal, the switch compares the port ID (PID) of the upstream sending port, so option D is also correct.
If all of those values remain identical from the switch's perspective, the device can finally compare the local port ID to determine which local interface becomes the root port, so option A is also correct. HCIA-Datacom teaches this comparison logic as part of STP election rules. The process ensures deterministic selection of a single root port on every non-root switch. Understanding the comparison sequence is essential for predicting STP topology behavior and for influencing port roles through path cost tuning or bridge-priority adjustments during campus network design and troubleshooting.
NEW QUESTION # 46
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