H12-811_V1.0 Exam Dumps - Huawei HCIA-Datacom Questions and Answers

In the ACL (Access Control List) configuration:

Rule 5: Permits traffic from 192.168.1.1.

Rule 10: Denies traffic from 192.168.1.1.

Since ACLs are processed in sequential order, the first matching rule is applied.

Option A (Incorrect): The first rule (permit) is matched before the deny rule.

Option B (Incorrect): 192.168.1.254 is not listed in the ACL, so it does not match any rule.

Option C (Correct): 192.168.1.1 matches the first permit rule (Rule 5), so it is allowed.

Option D (Incorrect): 192.168.1.254 is not mentioned in the ACL rules, so it does not match the permit rule.

Thus, the correct answer is C.

Detailed Explanation:Access ports are configured for a single VLAN and thus send untagged frames by default. Trunk ports, conversely, handle traffic for multiple VLANs, tagging each frame with a VLAN ID. (Reference: HCIA-Datacom Training Material, Switch Port Types and VLAN Tagging)

Comprehensive Explanation: Router A needs a static route to reach the Loopback interface (10.0.2.2/32) on Router B. The correct next-hop IP address is 10.0.12.2, which is Router B's interface IP address directly connected to Router A​

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Understanding the Network Diagram

Host A is in VLAN 10 with a gateway of 10.0.1.254.

Host B is in VLAN 20 with a gateway of 10.0.2.254.

The router (RTA) has two sub-interfaces:

G0/0/1.1 (10.0.1.254/24) for VLAN 10

G0/0/1.2 (10.0.2.254/24) for VLAN 20

The switch (SWA) is using VLAN trunking to forward packets to the router, requiring 802.1Q encapsulation.

One-Armed Routing (Router-on-a-Stick) is being used, meaning a single physical interface (G0/0/1) handles multiple VLANs using sub-interfaces.

Analyzing the Answer Choices

Option A (dot1q termination vid 20) → Incorrect

This command would be configured on G0/0/1.2, not G0/0/1.1.

Option B (dot1q termination vid 30) → Incorrect

VLAN 30 is not part of this topology.

Option C (dot1q termination vid 10) → Correct

Since G0/0/1.1 corresponds to VLAN 10, the correct command is dot1q termination vid 10.

Option D (dot1q termination vid 1) → Incorrect

VLAN 1 is usually the default VLAN, which is not relevant here.

Thus, the correct answer is C (dot1q termination vid 10).

Detailed Explanation:Based on the provided configuration, the interfaces on LSW1 and LSW2 are both configured as trunk ports that allow VLAN 10 to pass. This ensures that data frames tagged with VLAN 10 can be transmitted and received across the trunk link between LSW1 and LSW2 without issues​​.

Direct Route (C): This has the highest priority because it represents networks directly connected to a router’s interfaces.

Static Route (B): These are manually configured but have lower priority than direct routes.

OSPF Route (D): OSPF dynamically learns routes and assigns them based on cost, but it has lower priority than direct and static routes.

RIP Route (A): RIP has the lowest priority due to its high administrative distance (120).

Priority order (from highest to lowest):Direct Route > Static Route > OSPF Route > RIP Route.

Thus, the correct answer is C (Direct Route).

Detailed Explanation: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. (Reference: HCIA-Datacom Training Material, Layer 2 Switching and MAC Address Learning)

MAC Address Analysis:

MAC addresses starting with 01-00-5E are reserved for IPv4 multicast by the IANA.

Why Other Options Are Incorrect:

A: The address is valid and reserved for multicast.

C: Broadcast addresses use FF-FF-FF-FF-FF-FF.

D: Unicast addresses are typically hardware-assigned and do not use this prefix.

References: HCIA-Datacom V1.0 Certification Guide, Chapter 7: Ethernet Basics.

In Spanning Tree Protocol (STP), Topology Change (TC) BPDUs are used to notify switches about network topology changes.

The Root Bridge generates BPDUs with TC bits set, which are forwarded through the network.

Non-root switches forward these BPDUs through their Designated Ports.

Option A (Incorrect - Root Port): The Root Port receives BPDUs from the Root Bridge but does not forward them.

Option B (Correct - Designated Port): Designated ports are responsible for forwarding BPDUs down the tree towards other switches.

Option C (Incorrect - Backup Port): Backup ports are blocking and do not forward BPDUs.

Option D (Incorrect - Alternate Port): Alternate ports are in a blocking state and do not forward BPDUs.

Thus, the correct answer is B.