H12-224 : HCNP-R&S Fast Track (Huawei Certified Network Professional – Routing & Switching Fast Track) : Part 05

H12-224 : HCNP-R&S Fast Track (Huawei Certified Network Professional – Routing & Switching Fast Track) : Part 05

1. The Layer 2 packet header in EAPoL packets is | DMAC | SMAC | TYPE | EAPOL | FCS |.

   Which statements are true? (Choose three.)

   • The destination address of packets is a specified MAC address. 
   • The destination address of packets is a unicast MAC address.
   • EAPoL packets cannot be forwarded by switches.
   • The source MAC address of packets is the MAC address of the interface that sends packets.

2. Which statements about the MUX VLAN configuration are true? (Choose two.)

   

   •  VLAN 10 is the principal VLAN 
   • VLAN 11 is the principal VLAN
   • VLAN 12 is the subordinate separate VLAN 

3. On the MSTP network as shown in the figure, what is the role of the switch in MSTID according to the configuration?

   

   •  Root switch 
   • Slave switch
   • Non-root switch
   • None of the above

4. Which of the following statements about RSTP and STP is true?

   • STP has more port states than RSTP. 
   • The port roles used in RSTP is less than the port roles used in STP.
   • Since RSTP adopts fast convergence mechanism, it does not have Learning state which is available in STP.
   • Same as STP, the ports will enter into Listening state once the RSTP has been enabled. Then, the ports can receive BPDU and calculate the spanning tree.

5. 

   • True 
   • False

6. Which statements about VLAN configuration are true? (Choose two.)

   • You can enter the VLAN view at the same time you create a VLAN. 
   • If you run undo vlan, the VLAN is invalid, but still exists. You do not need to create the VLAN when you use it next time.
   • You can configure a character string of VLAN description. The length of the character string is not limited.
   • If you do not enter the VLAN ID when running the display vlan command, information about all VLANs will be displayed. 

7. Which of the following statements is not the advantage of STP?

   • STP can manage the redundant links. When the working link is down, network connectivity can be restored.
   • STP can prevent loops
   • STP can prevent broadcast storm
   • STP can save network bandwidth 

8. RSTP adopts fast convergence mechanism. So, there is no Forward Delay interval in RSTP.

   • True
   • False 

9. On an STP network, after the network topology changes, which BPDUs are sent during flooding of topology change information on the entire network?

   • BPDUs with the TCN flag
   • BPDUs with the TCA flag
   • BPDUs with the TC flag
   • All of the above 

10. According to OSI reference model, Layer 2 LAN switch operates at ( ).

    • Physical layer
    • Data link layer 
    • IP layer
    • Application layer

11. Which statements about VLAN are true? (Choose three.)

    • The VLAN improves network security. Users on different VLANs cannot communicate with each other.
    • The VLAN improves network processing efficiency. Users on different VLANs are separated from each other. Therefore, the size of a broadcast domain is reduced.
    • Layer 2 forwarding is only based on destination MAC addresses, and is irrelevant to VLAN configuration.
    • The VLAN technology is a management method that controls the communication between terminals.

12. In STP, BPDU packet is carried by ( ).

    • IP packet
    • TCP packet
    • Ethernet frame 
    • UDP packet

13. Which statements about VLAN allocation are true? (Choose three.)

    • The IP subnet VLAN is used to send the packets from the specified network segment or IP address over the specified VLAN.
    • The MAC address- or IP subnet-based VLAN is valid for only the untagged packets.
    • The protocol-based VLAN has a higher priority than the IP subnet-based VLAN.
    • The protocol-based VLAN indicates that service types on the network are bound to VLANs. 

14. According to the STP protocol, a certain field in the BPDU identifies the root switch. That is, if the BPDU sent by a switch contains this field, this switch is considered as the root switch.

    What is this field?

    • Root Identifier 
    • Root Path Cost
    • Bridge Identifier
    • Port Identifier

15. In the network diagram, which switch will be selected as the root switch?

    • SWA 
    • SWB
    • SWC
    • None of the above

16. Which are 802.1x authentication modes? (Choose two.)

    • EAP relay mode 
    • Proxy mode
    • EAP termination mode 
    • Remote mode

17. STP elects ( )

    • One bridge as the Root Bridge and another one as the Backup Root Bridge
    • One bridge as the Root Bridge 
    • Two bridges as the Root Bridge
    • One Designated Bridge

18. How many port states are defined by STP?

    • 3
    • 4
    • 5
    • 6

19. As shown in the figure, when the STP network runs properly, which device does the designated port of LANC reside?

    

    • SWA
    • SWB 
    • SWC
    • None of the above

20. Each STP switch has a unique switch ID. Which two entries does the switch ID contain?

    • Two-byte switch priority
    • Six-byte MAC address
    • Two-byte switch priority and six-byte MAC address 
    • Six-byte switch priority and six-byte MAC address