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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Typical Campus Networking Solution | 5% | - Campus network design and integration - End-to-end networking scenarios |
| Topic 2: Network O&M and Troubleshooting | 10% | - Fault diagnosis and troubleshooting methods - Network monitoring and management tools |
| Topic 3: Data Communication Network Basics | 10% | - Data forwarding process - Basic network concepts and architecture - Campus network basics - ARP, TCP/UDP principles - VRP system basics and operations - OSI and TCP/IP protocol models |
| Topic 4: Data Center Network Basics | 5% | - Data center architecture overview - Basic data center networking technologies |
| Topic 5: WLAN Technology Basics | 10% | - Basic WLAN configuration - WLAN architecture and working principles - 802.11 standards and WLAN components |
| Topic 6: Network Security and Services | 15% | - DHCP, DNS, FTP, Telnet services - ACL, NAT principles and configuration - AAA and basic security technologies |
| Topic 7: IP Technology Basics | 25% | - IPv4 addressing, subnetting - IP routing basics and forwarding - IPv6 basics - Static routing, OSPF fundamentals |
| Topic 8: Ethernet Technology Basics | 20% | - Link aggregation and stacking technologies - Ethernet standards and switch principles - VLAN, STP, RSTP principles and configuration |
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問題 #106
A Layer 2 switch works at the data link layer. As such, it can identify MAC addresses in data frames, forward data based on MAC addresses, and record mappings between MAC addresses and interface numbers in its MAC address table.
答案：B
解題說明：
Layer 2 switches operate at the data link layer, handling frames based on MAC addresses. They maintain a MAC address table to record mappings between MAC addresses and interfaces, allowing efficient frame forwarding within the local network.
問題 #107
The essence of communication is the transmission and exchange of information between two or more points.
The three elements of communication are the sender, content, and transmission channel of the information.
The receiver of the information is not included among these elements.
答案：A
解題說明：
This statement is false because the receiver is one of the fundamental elements of communication. In basic communication theory, a complete communication process requires at least four essential elements: the sender
, the information or message content , the transmission medium or channel , and the receiver . If the receiver is missing, communication cannot be completed because there is no endpoint to accept, interpret, or respond to the transmitted information.
In datacom networks, this concept maps directly to real networking scenarios. A source host generates data, the data is carried over some medium such as copper, fiber, or wireless, and a destination host receives the data. Network devices such as switches and routers assist the forwarding process, but the fundamental communication model still includes both communicating endpoints. HCIA-Datacom emphasizes the complete sender-to-receiver process when introducing network communication basics, protocol encapsulation, and forwarding. Therefore, excluding the receiver from the communication elements is conceptually incorrect.
The correct understanding is that sender, receiver, information content, and channel together form the essential basis of communication.
問題 #108
FILL BLANK
If a gateway router wants its connected IPv6 terminals to obtain IPv6 addresses through SLAAC, it must set the M-bit in RA messages to _______. (Enter only digits.)
答案：
解題說明：
0
Explanation:
For SLAAC (Stateless Address Autoconfiguration), the router advertisement message must indicate that no DHCPv6 stateful configuration is required. This is done by setting the M-bit (Managed flag) to 0, which tells hosts to configure their IPv6 addresses using SLAAC only.
問題 #109
According to the following routing table, it can be inferred that the IP address of VLANIF 2 on R1 is 10.0.12.1
/24.
[R1] display ip routing-table
Proto: Protocol Pre: Preference
Route Flags: R - relay, D - download to fib, T - to vpn-instance, B - black hole route Routing Table : public Destinations : 10 Routes : 10 Destination/Mask Proto Pre Cost Flags NextHop Interface
10.0.12.0/24 Direct 0 0 D 10.0.12.1 Vlanif2
10.0.12.1/32 Direct 0 0 D 127.0.0.1 Vlanif2
10.0.12.255/32 Direct 0 0 D 127.0.0.1 Vlanif2
10.0.21.0/24 Direct 0 0 D 10.0.21.1 Vlanif3
10.0.21.1/32 Direct 0 0 D 127.0.0.1 Vlanif3
10.0.21.255/32 Direct 0 0 D 127.0.0.1 Vlanif3
答案：B
解題說明：
This statement is true . From the routing table, the entry 10.0.12.0/24 Direct ... NextHop 10.0.12.1 Interface Vlanif2 indicates that the network 10.0.12.0/24 is directly connected through Vlanif2 , and the local interface address associated with that directly connected network is 10.0.12.1 .
This conclusion is further supported by the host route 10.0.12.1/32 Direct ... 127.0.0.1 Vlanif2, which represents the local IP address of the interface itself. On Huawei devices, when an IP address is configured on an interface, the routing table commonly generates a direct route to the connected network, a host route to the interface IP itself, and sometimes a host route to the broadcast address where applicable in IPv4. Therefore, from the displayed entries, it can indeed be inferred that VLANIF 2 has the IP address 10.0.12.1/24 . HCIA- Datacom uses these routing-table characteristics to help learners identify connected interfaces, local addresses, and route origins during troubleshooting and route analysis on routers and Layer 3 switches.
問題 #110
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.
答案：A
解題說明：
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.
問題 #111
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