Assume that the following WRED policies are used in QoS:
The length of the queue for saving DSCP packets with the priority being AF21 ranges from 35 to 40. The length of the queue for saving DSCP packets with the priority being AF22 ranges from 30 to 40. The length of the queue for saving DSCP packets with the priority being AF23 ranges from 25 to 40. In the case of congestion, DSCP packets with which of the following priority value will be discarded first?
A. AF21
B. AF22
C. AF23
D. All the same
Availability identifies the utility of a system. The availability of the system increases if the MTBF decreases or the MTTR increases.
A. True
B. False
Traffic policing usually uses which of the following QoS technologies?
A. GTS
B. LR
C. CAR
D. WRED
Assume that there are four flows a, b, c, and d, the transmission rate of each flow is 50 Mbit/s, and the total bandwidth of the interface for flow transmission is 100 Mbit/s. In the case of congestion, PQ is available for flow a. WFQ is available for flows b, c, and d, with the weight proportion being 1:2:3:4. Which of the following statement about the interface bandwidth allocated to each flow is true? (Choose two.)
A. The interface bandwidth allocated to flow a is 100 Mbit/s.
B. The interface bandwidth allocated to flow a is 50 Mbit/s.
C. The interface bandwidth allocated to flows b is 10 Mbit/s and interface bandwidths allocated to flows c and d are 20 Mbit/s each.
D. The interface bandwidth allocated to flows b is 25 Mbit/s and interface bandwidths allocated to flows c and d are 12.5 Mbit/s each.
Which of the following statements about the VRRP working process is false?
A. The router with the highest priority is elected as the master router.
B. The master router sends gratuitous ARP packets to inform connected devices or hosts of its virtual MAC address.
C. If the master router fails, the backup router with the highest priority is elected as the new master router.
D. To ensure fast convergence, a backup router immediately becomes the master router if the priority of the backup router is higher than the priority of the master router.
Based on fields IP precedence, MPLS EXP, or 802.1p, packets can be classified into how many service types?
A. 4
B. 6
C. 7
D. 8
IP network can provide various packet forwarding service, the service demands that users care during packet forwarding include. (Choose three.)
A. Throughput
B. Delay
C. Cost
D. Loss of packet
QoS includes which of the following aspects? (Choose three.)
A. Transmission bandwidth
B. Transmission delay and jitter
C. Packet loss ratio
D. Network security
Which of the following link efficiency mechanism can be used to compress RTP and TCP packet headers?
A. IPHC
B. LFI
C. PPP
D. All of the above
The Committed Access Rate (CAR) technology uses the token bucket (TB) to control traffic.
A. True B. False
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