H12-224 : HCNP-R&S Fast Track (Huawei Certified Network Professional – Routing & Switching Fast Track) : Part 02

H12-224 : HCNP-R&S Fast Track (Huawei Certified Network Professional – Routing & Switching Fast Track) : Part 02

1. Which of the following standards defines STP?

   • 802.1J
   • 802.1X
   • 802.1D 
   • 802.1P

2. Which statements about the PVID on the access interface are true?

   • When receiving a packet without the VLAN tag, the interface adds the VLAN tag to the packet and sets the VID in the tag to the default VLAN ID. 
   • When receiving a packet with a VLAN tag, the interface compares the VLAN ID in the tag with the default VLAN ID. If they are the same, the interface forwards the packets; otherwise, the interface discards the packets.
   • When the interface sends a packet with a VLAN tag that contains the default VLAN ID, the system removes the VLAN tag of the packet, and then forwards the packet.
   • None of the above.

3. Which statement about ARP proxy is false?

   • The ARP proxy, namely, the gateway, sends ARP request for the host. The MAC address in the ARP request packet is the MAC address of the host. 
   • The ARP proxy, namely, the gateway, sends ARP request for the host. The MAC address in the ARP request packet is the MAC address of its own interface.
   • ARP proxy is also called promiscuous ARP or ARP hack.
   • The ARP proxy allows the hosts on the networks with the same network ID to communicate with each other.

4. In RSTP network environment, a port can be set as edge port when it is directly connected with terminal.

   • True 
   • False

5. Which of the following statements about STP Designated Port is true?

   • Each of the bridge can have one Designated Port only.
   • Designated Port is responsible for forwarding packets to its connected network segments. 
   • The only path leading to the Root Bridge is through Designated Port.
   • Designated Port forwards the data packet from its corresponding switch to the Root Switch.

6. The following is the command output on a root switch of an MSTP region. How many switches are located in the MSTP region?

   • Less than 10
   • Less than 20
   • Less than 30 
   • Less than 40

7. If an MSTP switch detects that the neighboring switch works in RSTP mode, which mode does the MSTP switch work?

   • STP mode
   • RSTP mode 
   • MSTP mode
   • All of the above

8. When the GVRP registration mode is FIXED, which statement is true?

   • VLANs can be manually created and registered on the interface, and can also be dynamically registered and deregistered on the interface.
   • VLANs cannot be manually created and registered on the interface, but can be dynamically registered and deregistered on the interface.
   • VLANs can be manually created and registered on the interface, but cannot be dynamically registered or deregistered on the interface. 
   • VLANs cannot be manually created and registered on the interface, and cannot be dynamically registered or deregistered on the interface.

9. In a switching network that has been enabled with STP protocol, the priorities of all the switches are the same. The MAC address of switch1 is 00-e0-fc-00-00-40, MAC address of switch2 is 00-e0-fc-00-00-10, MAC address of switch3 is 00-e0-fc-00-00-20, and MAC address of switch4 is 00-e0-fc-00-00-80. Which of the switches will be elected as the Root Bridge?

   • Switch1
   • Switch2
   • Switch3
   • Switch4

10. Which statements are false?

    • The VLAN mapping function is usually configured on the edge node of a public network.
    • The VLAN mapping function can save VLAN resources on a public network.
    • VLAN mapping allows private networks on different VLANs to communicate with each other over the ISP network.
    • VLAN mapping allows only the private networks on the same VLAN to communicate with each other. 

11. After detecting a user with a new MAC address, the switch initiates an EAP authentication request. If the client does not respond and the MAC address bypass authentication is not configured, which statement is false?

    • If the client does not respond after the number of authentication requests reaches a specified value, the switch considers that the client software is not installed.
    • All permissions of the user are prohibited. 
    • The user is allowed to access only the isolated zone.
    • Detection is initiated again after a period of time.

12. As shown in the figure, which switch is the root switch according to the configuration?

    

    • SWA
    • SWB
    • SWC
    • None of the above

13. The STP protocol can prevent broadcast storms caused by loops on the Layer 2 network.

    • True 
    • False

14. According to the figure, what is the status of Ethernet1/0/13 in MSTI 1?

    

    • Forwarding
    • Discarding 
    • Learning
    • None of the above

15. Which types of interfaces can be configured with selective QinQ? (Choose two.)

    • Access interface
    • Trunk interface
    • Hybrid interface
    • dot1q-tunnel interface

16. Which of the following statements about the link failure detection in STP protocol is not true?

    • When network topology is stable, the Designated Port sends BPDU packet at every Hello Time interval.
    • When network topology is stable, BPDU packets will be transmitted periodically.
    • When the port does not receive new BPDU within a certain interval, the old configuration BPDU will time out and the link failure can be detected.
    • The port sends Configuration BPDU at every Hello Time interval. When the link fails, Configuration BPDU cannot be sent out. As a result, this port can detect the link failure. 

17. Which statement about the hybrid interface is true?

    • A hybrid interface can only be connected to network device.
    • A hybrid interface can only be connected to host.
    • A hybrid interface can be connected to host or network device. 
    • A hybrid interface cannot be configured with VLAN ID.

18. Which statements are true? (Choose three.)

    • Port isolation is a mechanism that controls the access between switch interfaces.
    • Port isolation is an isolation mechanism at the physical layer.
    • Port isolation prevents the computers connected to different ports from accessing each other.
    • Port isolation can be configured based on VLANs.

19. On the RSTP network as shown in the figure, what RSTP operations will occur after the E1 port of SWB fails? (Choose three.)

    

    • SWB deletes the MAC address entries with the E1 port as the destination interface. 
    • The spanning tree is recalculated and the E2 port is elected as the new root port.
    • All the interfaces in forwarding state send topology change notifications (TCNs) to notify other switches of the topology change.
    • All the non-edge ports in forwarding state send TCNs to notify other switches of the topology change. 

20. According to the MSTP protocol, each MST instance calculates an independent spanning tree by using the RSTP algorithm.

    • True 
    • False