None Stop Forwarding (NSF) is an important HA technology. It keeps neighbor relationships unchanged even in the case of a fault in the control plane of the router, protecting key services on the network from interruption.
A. True
B. False
Which of the following BFD versions is supported in VRP 5.7?
A. Version 0
B. Version 1
C. Version 2
D. Version 3
Which of the following statements about VRRP are true? (Choose three.)
A. VRRP determines the roles of routers (master or backup) in a virtual router based on their priorities.
B. If a backup router works in non-preemption mode and has a higher priority than the masterrouter, it will become the master router unless the master router fails.
C. After a backup router in preemption mode receives a VRRP packet from the master router, it compares its priority with the priority carried in the VRRP packet. If its priority is higher than the priority of the master router, it preempts to be the master router; if not, it remains in the backup state.
D. If two routers competing for the master router have the same priority, the router with a higher interface IP address becomes the master router.
Which of the following statements about VRRP are true? (Choose three.)
A. VRRP is a redundancy protocol designed for a multicast- or broadcast-capable LAN such as the Ethernet. VRRP ensures that traffic is switched to another router when the next-hop router for a host on the LAN fails. This guarantees the reliability and non-stop forwarding of services.
B. In VRRP, two virtual router ID and a virtual IP address need to be configured on a router to generate a virtual MAC address. A virtual router is formed.
C. Hosts on a network can communication with a virtual router without knowing any information about physical routers on the network.
D. A virtual router consists of a master router and several backup routers. The master router forwards packets. When the master router fails, a backup router takes over as the master router.
BFD control packets are encapsulated in UDP packets for transmission. Which of the following is the destination port number for single-hop BFD control packets?
A. 3784
B. 4784
C. 5784
D. 6784
Based on classification rules, traffic classification can be divided into which of the following types? (Choose two.)
A. Simple traffic classification
B. Complex traffic classification
C. On-demand traffic classification
D. Service traffic classification
A company has four departments. Department A has 80 PCs, Departments B and C both have 20 PCs, and Department D has 30 PCs. Assuming the IP address 192.168.1.0/x is used, which of the following statements are true if the VLSM technology is used to divide subnets? (Choose two.)
A. Plan subnet 192.168.1.0/25 for Department A. The range of host addresses is 1 to 126.
B. Plan subnet 192.168.1.128/27 for Department B. The range of host addresses is 129 to 159.
C. Plan subnet 192.168.1.160/27 for Department C. The range of host addresses is 161 to 190.
D. Plan subnet 192.168.1.192/27 for Department D. The range of host addresses is 192 to 222.
When a local BFD session in the Init state receives packets with the Stat field being Down, the local BFD session changes its status to Down.
A. True
B. False
In traffic shaping, the packet whose transmission rate exceeds the rate limit will be discarded or re-marked.
A. True
B. False
BFD packets are classified into control packets and echo packets.
A. True
B. False
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