H12-224 : HCNP-R&S Fast Track (Huawei Certified Network Professional – Routing & Switching Fast Track) : Part 14

H12-224 : HCNP-R&S Fast Track (Huawei Certified Network Professional – Routing & Switching Fast Track) : Part 14

1. Which of the following statements are correct regarding default gateway of PC in the network running VRRP?

   • Configure only one gateway for the PC which is the IP address of Master.
   • Configure only one gateway for the PC which is the IP address of virtual router. 
   • Configure two gateways for the Pc which are the IP addresses of Master and Slave.
   • Configure three gateways for the PC which are the IP addresses of Master, Slave and virtual router.

2. In traffic policing using two token buckets & two-rate, when the CIR is set to 1 Mbit/s and the PIR is set to 2 Mbit/s, what is the maximum transmission rate for the traffic in green?

   • 1 Mbit/s 
   • 2 Mbit/s
   • 3 Mbit/s
   • 4 Mbit/s

3. WFQ can effectively control the delay and jitter by means of configuring weights for different services.

   • True 
   • False

4. The IP packet has a special field to mark the QoS. For example, the last 6 bits in the ToS field of an IPv4 packet mark the DSCP value.

   • True
   • False 

5. Which of the following statements about the device state change is correct after failure in the intermediate link for transmitting VRRP heartbeats?

   • The status of the master and salve devices remains unchanged.
   • Both the master and slave devices enter the Master state. 
   • Both the master and slave devices enter the Slave state.
   • Both the master and slave devices enter the Initial state.

6. IP QoS models include: (Choose three.)

   • Best-Effort
   • Integrated Service
   • Differentiated Service
   • FIFO Service

7. The virtual router uses a virtual MAC address but not the actual MAC address of the interface to respond to an ARP request.

   • True 
   • False

8. A VRRP virtual router can have one or more IP addresses.

   • True 
   • False

9. After the session is re-established between the BGP GR helper and its neighbor, original forwarding entries are deleted.

   • True
   • False 

10. Which of the following statements about the master router in a VRRP backup group are true? (Choose three.)

    • It regularly sends VRRP packets.
    • It uses a virtual MAC address to respond to ARP requests sent from a virtual IP address.
    • It forwards an IP packet whose destination MAC address is a physical MAC address.
    • It changes to the Backup state if the priority carried in the received packet is greater than its own priority. 

11. The reliability of a product or a system is generally evaluated with the two indicators of Mean Time to Repair (MTTR) and Mean Time Between Failures (MTBF).

    • True 
    • False

12. During the GR of dynamic routing protocols (such as OSPF and BGP) neighbor relationships remain unchanged.

    • True
    • False 

13. Complex traffic classification matches packets with rules and then takes actions to matching packets.

    • True 
    • False

14. Which of the following technologies are available for traffic shaping? (Choose two.)

    • GTS
    • LR
    • CAR
    • WRED

15. Traffic shaping uses queues to cache traffic whose transmission rate exceeds the limit.

    Which of the following statement about traffic shaping is not true?

    • Compared with traffic policing, traffic shaping is advanced in terms of caching burst traffic.
    • With traffic shaping, packets can be transmitted at an even rate.
    • Caching packets in the queue increases the packet delay in case of congestion.
    • In case of congestion, traffic shaping causes the packet loss ratio to increase. 

16. Which of the following statements are correct regarding VRRP?

    • Only Master can process the data packets sending to virtual router. 
    • Only Slave can process the data packets sending to virtual router.
    • Both Master and Slave can process the data packets sending to the same virtual router to realize load balance.
    • By default, only Master can process the data packets sending to virtual router; but we can do some configuration to make the Slave process the data packets sending to virtual router.

17. Which of the following statement about QoS in DiffServ mode is false?

    • The parameter field in the IP packet header informs devices on the network of the QoS requirements of the application.
    • Every device on the packet transmission paths can learn the service request types by analyzing the IP packet header.
    • Before sending packets, the application program needs to confirm that the network has reserved resources for packet transmission. 
    • DiffServ is a QoS solution based on packets.

18. In addition to traffic rate limit, the CAR can mark packets with colors. If one token bucket & one-rate is used in traffic policing and the number of tokens is insufficient, packets are marked with which of the following color?

    • Red 
    • Green
    • Yellow
    • Blue

19. BFD is a common fast detection technology. It implements the fast switchover function only when collaborating with other fast switchover technologies.

    • True 
    • False

20. Which of the following statement about packet marking is false?

    • TheQosInfo field of the packet can be marked.
    • The DSCP and IP precedence fields of the IP packet can be marked.
    • The 802.1p field of the VLAN packet can be marked.
    • The IP address of the packet can be marked.