LDP has two different mechanisms for discovering peers. Which of the following statements are true?
(Multiple Choice)

The two mechanisms are basic discovery mechanism and extended discovery mechanism.
The basic discovery mechanism periodically sends Hello messages to discover LDP peers.
The basic discovery mechanism is used to discover directly-connected LSR peers on a link.
The extended discovery mechanism periodically sends Hello messages to specified addresses to discover LDP peers.
The extended discovery mechanism is used to discover indirectly-connected LSR peers on a link.

Answer(s): A,B,C,E

Which of the following are the major objects of network management? (Multiple Choice)

Ensure that network users can receive the expected service quality and technical support information.
Decrease device migration costs.
Reduce the network device service life and extend the service period.
Help network engineers copy with complex network data to ensure quick and correct data display to end users.

Answer(s): A,D

Which of the following statements regarding the VRRP backup are true? (Multiple Choice)

When the VRRP backup receives VRRP packet from the VRRP master, it can determine whether the master is in the normal state.
When receiving VRRP packets with the priority of 0, the backup directly switches to be the master.
The backup discards IP packets destined for the virtual MAC address.
The backup responds to IP packets destined for the virtual IP address.

Answer(s): A,B,C