Question 11
Which of the following statements about the master router in a VRRP backup group are true? (Choose three.)
A. It regularly sends VRRP packets.
B. It uses a virtual MAC address to respond to ARP requests sent from a virtual IP address.
C. It forwards an IP packet whose destination MAC address is a physical MAC address.
D. It changes to the Backup state if the priority carried in the received packet is greater than its own priority.
Question 12
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).
A. True
B. False
Question 13
During the GR of dynamic routing protocols (such as OSPF and BGP) neighbor relationships remain unchanged.
A. True
B. False
Question 14
Complex traffic classification matches packets with rules and then takes actions to matching packets.
A. True
B. False
Question 15
Which of the following technologies are available for traffic shaping? (Choose two.)
A. GTS
B. LR
C. CAR
D. WRED
Question 16
Traffic shaping uses queues to cache traffic whose transmission rate exceeds the limit.Which of the following statement about traffic shaping is not true?
A. Compared with traffic policing, traffic shaping is advanced in terms of caching burst traffic.
B. With traffic shaping, packets can be transmitted at an even rate.
C. Caching packets in the queue increases the packet delay in case of congestion.
D. In case of congestion, traffic shaping causes the packet loss ratio to increase.
Question 17
Which of the following statements are correct regarding VRRP?
A. Only Master can process the data packets sending to virtual router.
B. Only Slave can process the data packets sending to virtual router.
C. Both Master and Slave can process the data packets sending to the same virtual router to realize load balance.
D. 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.
Question 18
Which of the following statement about QoS in DiffServ mode is false?
A. The parameter field in the IP packet header informs devices on the network of the QoS requirements of the application.
B. Every device on the packet transmission paths can learn the service request types by analyzing the IP packet header.
C. Before sending packets, the application program needs to confirm that the network has reserved resources for packet transmission.
D. DiffServ is a QoS solution based on packets.
Question 19
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?
A. Red
B. Green
C. Yellow
D. Blue
Question 20
BFD is a common fast detection technology. It implements the fast switchover function only when collaborating with other fast switchover technologies.
A. True
B. False
