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| Section | Weight | Objectives |
|---|---|---|
| IP Technology Basics | 25% | - OSPF fundamentals (single-area) - DHCP principles and configuration - IPv6 basics and address types - IPv4 addressing and subnetting - ICMP protocol - NAT (Network Address Translation) - Static routing and default routing - ACL (Access Control List) |
| Data Center Network Basics | 5% | - Data center fabric concepts (VXLAN, SDN) - Data center network architecture overview - Cloud computing and virtualization basics |
| Network O&M and Troubleshooting | 10% | - Common network fault diagnosis - Network maintenance tools (ping, tracert, display commands) - Troubleshooting methodology and process - Network documentation and baselining |
| WLAN Technology Basics | 10% | - WLAN networking architecture (AC + AP) - WLAN RF fundamentals (channels, bands) - WLAN basic configuration and troubleshooting - WLAN overview and 802.11 standards |
| Network Security and Services | 15% | - Network management protocols (SNMP, NTP) - FTP / TFTP and file management - AAA (Authentication, Authorization, Accounting) - Network security overview - Firewall basics and security zones - IPsec VPN fundamentals |
| Data Communication Network Basics | 10% | - OSI and TCP/IP protocol models and functions of each layer - Basic principles and operations of VRP (Versatile Routing Platform) - TCP/UDP principles - ARP principles - Data forwarding process - Basic concepts and life cycle of campus network - Basic network concepts, IP network architecture, and standardization organizations |
| Typical Campus Networking Solution | 5% | - Hierarchical network model (core, aggregation, access) - Typical campus network deployment scenarios - Campus network architecture design - Network reliability and redundancy design |
| Ethernet Technology Basics | 20% | - Ethernet overview and frame structure - VLAN principles and configuration - VLAN intercommunication (sub-interface, VLANIF) - Link aggregation (LACP) - MAC address table and forwarding - STP / RSTP / MSTP spanning tree protocols |
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NEW QUESTION # 127
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: A
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 # 128
The administrator performs the configuration shown in the figure on SW1. After the network is stable, the administrator pings the IP address of PC2 from PC1. The connectivity is normal. Then, the administrator runs the undo vlan 10 command on SW1. After the network is stable, the administrator pings the IP address of PC2 from PC1 again. Which of the following statements are false about this scenario? (Choose all that apply.)
Answer: A,B,C,D
Explanation:
After the VLAN is removed, the access VLAN referenced by the interfaces no longer exists, so frames arriving from either PC are dropped instead of being forwarded, breaking end-to-end communication. Because of this, connectivity between the two PCs cannot be maintained. The switch does not accept and process the incoming frames as described; they are discarded once the VLAN membership becomes invalid. In addition, access interfaces do not add VLAN tags during reception, and frames inside the device are still logically associated with VLAN tagging for forwarding purposes rather than being untagged internally.
NEW QUESTION # 129
Which of the following configurations is used to configure the WPA2 security policy on a Huawei WAC?
Answer: B
Explanation:
WPA2 security policy on a Huawei WAC is configured using the WPA2-specific command together with PSK (pre-shared key) authentication and encryption method (such as AES). The correct configuration explicitly specifies WPA2 and PSK together, ensuring the WLAN uses WPA2-PSK security mode with AES encryption for secure wireless access.
NEW QUESTION # 130
R1 has the following configurations:
[R1] nat address-group test 1
[R1-address-group-test] section 1 100.1.23.1 100.1.23.254
[R1-address-group-test] mode pat
[R1-address-group-test] quit
[R1] nat-policy
[R1-policy-nat] rule name test
[R1-policy-nat-rule-test] source-address range 192.168.0.0 192.168.255.255
[R1-policy-nat-rule-test] action source-nat address-group test
[R1-policy-nat-rule-test] quit
[R1-policy-nat] quit
[R1] interface GE 0/0/2
[R1-GE0/0/2] nat enable
[R1-GE0/0/2] quit
Which of the following statements is false ?
Answer: D
Explanation:
Option C is false. In this configuration, the NAT address group test contains the public address range
100.1.23.1 to 100.1.23.254 , and the address group works in PAT mode . Port Address Translation allows multiple different intranet users to share the same public IP address while being distinguished by different transport-layer port numbers. Therefore, intranet users with different private IP addresses do not have to use different post-NAT public IP addresses.
Option A is true because 100.1.23.254 is included in the configured public address pool and can be used for source NAT. Option B is also true because NAT is enabled on GE0/0/2 , so if user traffic does not leave through that interface, the NAT policy may not be applied and public access may fail. Option D is true because the configured source address range includes 192.168.1.100, which falls within 192.168.0.0 to
192.168.255.255. HCIA-Datacom teaches that NAT behavior depends on matching traffic, address pools, PAT or no-PAT mode, and the interface where NAT is enabled. This question mainly tests understanding of source NAT and PAT address-sharing behavior.
NEW QUESTION # 131
On an STP network, an administrator wants SW2 to be elected as the root bridge. Which of the following methods can be used to achieve this goal?
Answer: A
Explanation:
In STP, the root bridge is elected based on the lowest bridge ID (BID). A BID is composed of the bridge priority and the MAC address of the switch. The device with the smallest BID becomes the root bridge.
Therefore, if an administrator wants SW2 to become the root bridge, the most direct and correct method is to configure a lower system priority on SW2, making option C correct.
Option A is incorrect because port priority affects port-role selection in some tie-breaking scenarios, but it does not determine root-bridge election. Option B is the opposite of what is required, because a higher system priority makes the BID larger and reduces the chance of being elected as root. Option D is also incorrect because root path cost is used by non-root bridges to select the best path to the existing root bridge; it does not determine which switch becomes the root bridge in the first place. HCIA-Datacom stresses that bridge priority tuning is the standard administrative method used to control root bridge placement in campus networks for stable and predictable Layer 2 topology design.
NEW QUESTION # 132
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