Free HCIA-Datacom V2.0 Practice Questions

This question tests the difference between Layer 3 addressing and Layer 2 encapsulation during routing. The IP packet originated by PC1 keeps PC1 ' s IP address as its source IP and PC2 ' s IP address as its destination IP as it traverses the routers. Ethernet MAC addresses, however, are rewritten at every routed hop. When R1 forwards the packet across the link toward R2, R1 builds a new Ethernet frame on its outgoing interface. According to the exhibit, R1 ' s outgoing interface on the R1-R2 link uses MAC_C, so MAC_C is the source MAC address. The next-hop device on that link is R2, whose receiving interface uses MAC_D, so MAC_D is the destination MAC address. MAC_A belongs to PC1 and was relevant only on the first local Ethernet segment. MAC_F belongs to PC2 and is used on the final Ethernet segment from R2 to PC2, not on the R1-R2 link. Therefore the correct statements are B and

D.  

ospf 1 → [R1]

area 0 → [R1-ospf-1]

network 10.0.12.1 0.0.0.0 → [R1-ospf-1-area-0.0.0.0]

ospf enable 1 area 0 → [R1-GE0/0/0]

Huawei devices support two common ways to enable OSPF on an interface.

The first method is the process-based method . In this method, you first enter system view, then enter the OSPF process view using ospf 1, so this command belongs to [R1] . After that, you enter the area view using area 0, so this command belongs to [R1-ospf-1] . Inside the area view, the command network 10.0.12.1 0.0.0.0 is used to match the interface with IP address 10.0.12.1, so it belongs to [R1-ospf-1-area-0.0.0.0] .

The second method is the interface-based method . In this method, OSPF is enabled directly under the interface using ospf enable 1 area 0, so this command belongs to [R1-GE0/0/0] .

This question tests the difference between global OSPF process configuration and direct interface OSPF enabling , both of which are standard Huawei OSPF configuration methods.

The exhibit shows GE1/0/2 as an access port in VLAN 3 on both switches, so PC2 and PC4 belong to the same Layer 2 broadcast domain. The inter-switch GE1/0/3 link is a trunk that permits VLANs 2 and 3, allowing VLAN 3 frames to pass between SW1 and SW2. Therefore, PC2 and PC4 can communicate at Layer 2, making statement B true. GE1/0/1 remains an access interface in the default VLAN 1 because no other default VLAN is configured. VLAN 1 is not permitted across the shown trunk, so PC1 cannot communicate with PC3 across the switches. PC1 and PC2 are also in different VLANs locally, and PC2 and PC3 are in different VLANs. Devices in different VLANs cannot exchange Layer 2 traffic directly; a Layer 3 gateway is required for inter-VLAN communication. Accordingly, statements A, C, and D are the false statements, which makes A, C, and D the correct selections.

All four options are possible causes of FTP login failure, so the correct answer is A, B, C, and

D.  

Option A is correct because if the FTP server function is not enabled on the Huawei device, the device cannot provide FTP services and the client cannot log in. Option B is also correct because if the authorized directory is not specified for the FTP user, the user may not be able to complete login or access file services properly, depending on the FTP user configuration requirements. Option C is correct because an FTP user account must be configured with the required username and password; otherwise, authentication cannot succeed. Option D is also correct because if the network between the FTP client and the device is unreachable, the client cannot establish the FTP connection at all.

In HCIA-Datacom troubleshooting, FTP login failure is usually checked from four aspects: service enablement, user configuration, permission or directory authorization, and network connectivity. This question tests standard remote maintenance troubleshooting logic for file transfer services on Huawei network devices.

PC1 and PC2 are in different VLANs on SW1, while PC3 is in VLAN 4 on SW2. To allow traffic from VLAN 2 and VLAN 3 users to reach PC3 through the inter-switch link, SW1 must be able to send frames from PC1 and PC2 toward SW2 in a form that SW2 can place into VLAN 4.

Option B is valid because a hybrid interface on SW1 can send frames from VLAN 2 and VLAN 3 untagged , and setting the PVID to VLAN 4 allows untagged inbound frames on the peer side to be associated appropriately when matched with the SW2 configuration. Option C is also valid because configuring SW2’s GE1/0/3 as a trunk allowing VLAN 4 and setting its PVID to VLAN 4 means untagged frames arriving from SW1 are treated as belonging to VLAN 4 and can then be forwarded to PC3 through its access interface.

Option A is incomplete because only configuring SW2 does not solve the VLAN handling on SW1. Option D is incorrect because a trunk on SW1 would send VLAN 2 and VLAN 3 frames tagged, which would not match the VLAN 4-only expectation on SW2 in this scenario.