A company is building a new network and needs to deploy VRRP to improve reliability. To prevent configuration errors from causing network communication failures, what should engineers pay attention to when deploying VRRP?

• The virtual IP address deployed by VRRP and the IP address of the interface need to be in the same network segment.

• The VRRP protocol versions configured on the internal switches of different backup groups should be kept as consistent as possible, otherwise, packets may not interoperate.

• The virtual IP addresses between different backup groups cannot overlap.

• The security factor can be improved by manually configuring the virtual MAC address of VRRP.

A corporate administrator wants to configure BFD single-hop detection to achieve fast detection of directly connected routes. Which of the following configurations are essential for the administrator?

• Configure the remote identifier of the BFD session.

• Configure the local identifier of the BFD session.

• Configure the BFD group IP address.

• Enable global BFD function.

The figure shows an OSPF network. R1, R2, and R3 are running OSPF. R1 will advertise its four private network routes into OSPF. The current requirement is to use the filter-policy tool to ensure that only R2's routing table does not contain the route entry for the destination network 192.168.3.0/24, but R1 and R3's routing tables contain the route entry for the destination network 192.168.3.0/24. Which of the following operations using filter-policy cannot achieve the above requirement?

• Filter routes using Filter-Policy when importing them on R1.

• Filter received routes using Filter-Policy on R2.

• Filter advertised routes using Filter-Policy on R2.

• Filter routes imported by Filter-Policy when advertising them on R1.

During daily operations and maintenance, a corporate administrator checks the IGMP configuration of a router interface as shown below. Which of the following descriptions about this information are correct?

• The interface IP address is 192.168.1.1.

• The IGMP protocol version is 2.

• The specific group query message interval is 60 seconds.

• The maximum query response time is 10 seconds.

The IP-Prefix configured for a Huawei router is shown below. Which of the following route information can be successfully matched and execute the 'permit' action?

• 10.1.2.0/25

• 10.1.2.5/32

• 10.1.1.0/24

• 10.1.1.2/32

A corporate administrator checked the detailed information of a BGP route during daily operations and maintenance, as shown below. Which of the following descriptions about this route are correct?

• The original next-hop of this route is 172.16.1.2.

• The ID of the local BGP device is 10.1.1.1.

• The local autonomous system number is 100.

• This route is preferred because of its high local pref priority.

In an OSPF network, the Router ID is used to uniquely identify a router running OSPF within an autonomous system and follows certain election rules. In which of the following scenarios will a re-election of the Router ID be triggered?

• import-route was configured and the OSPF process was restarted.

• The OSPF Router ID was manually changed and the OSPF process was restarted.

• The IP address that was originally elected as the system's Router ID was deleted and the OSPF process was restarted.

• The system Router ID was reconfigured and the OSPF process was restarted.

In an OSPF network, to reduce the size of the LSDB and improve device performance, OSPF defines several special areas. Among them, which of the following types of LSAs may exist in a totally NSSA area?

• Type 3 LSA

• Type 7 LSA describing summary routes

• Type 7 LSA

• Type 3 LSA describing summary routes

In an OSPF network, there are various network types, such as Broadcast, P2P, P2MP, and NBMA. Under default circumstances, which of the following network types have a Hello time of 30 seconds?

• P2P

• Broadcast

• NBMA

• P2MP

A company deployed IPSec and later found that services were not communicating. After investigation by the administrator, it was discovered that no data traffic was triggering IKE negotiation. Which of the following reasons could potentially lead to this situation?

• Route unreachable.

• ACL and protected data flow mismatch.

• Inter-zone security policy configuration error.

• IPSec policy was not correctly applied to the relevant interface.