H12-821_V1.0 Exam Questions

In different scenarios, RSTP provides different protection functions. Which of the following statements is wrong?

The command format of the prefix list [IP (ip-prefix) is ip (ip-prefix-name [index index-number] | deny | ipv4-address mask-length | [greater-equal greater-equal-value] | [less-equ...

What should you do when a router running BGP receives a route whose next hop is unreachable?

Which of the following description of the BGP UPDATE message is incorrect?

Which TLV is used by IS-IS to describe the IP Interface Address?

Which of the following statements about the OSPF protocol is incorrect?

When the MTU of the interconnection interface of two routers in the broadcast network does not match, and the interface is configured with ospf mtu-enable, which of the description...

Application Specific Packet Filter (ASPF) is a packet filter based on the application layer. It will check the application layer protocol information and monitor the application la...

Which of the following types of LSAs can carry tag information for external routes?

In which of the following situations will a router running IS-IS not generate LSP?

Can be used for a variety of routing protocols. The routing tool consisting of if-match and apply clauses is?

During the operation of DHCP, various message types will be exchanged. So which of the following messages are not sent from the client to the server?

Which of the following description about BGP, OSPF, IS-IS is correct?

When configuring BGP, if such an alarm is generated: "BGP!6ESTABLISHED-OID[old] The BGP FSM enters the Establishedstate , which of the following description is correct?"

Which of the following description about the reliable routing update of BGP is correct?

Which of the following is the Link ID of the third type LSA?

There are 500 employees in a certain enterprise building, and they usually start to connect to the company's WLAN network in the lobby when they go to work. As each employee walks...

Which of the following attacks is not a network layer attack?

Which of the following description of the permanent multicast address is wrong?

Which of the following description about BGP features is wrong?

In the IS-IS broadcast network, which multicast MAC address does the Level-2 router use as the destination address for sending IH?

Which of the following IEEE 802.11 standards corresponds to Wi-Fi6?

If the current dual-link hot backup, the engineer configures the OAPWAP heartbeat detection interval to be 20 seconds, and enables the dual-link backup function, then the time when...

Which of the following is the command to configure VRRP to track the status of the physical interface?

IGMP Snooping cannot solve the bandwidth waste of multicast traffic on Layer 2 switches. That is, whether IGMP Snooping is configured on Layer 2 switches has no impact on multicast...

IGMPv1 also supports the general group query of IGMPv1 version and the specific group query of IGMPv2 version, but also supports the specified source/group query of IGMPv3 version.

In a typical security-based Portal authentication scenario, when a user successfully performs Portal authentication and disconnects from the network and reconnects within a certain...

In OSPF, the AS border router can be an Internal Router or an ABR, but it must belong to the backbone area.

The ABR of the OSPF complete stub area does not flood the third, fourth and fifth type LSAs to the area. Therefore, the ABR of the complete stub area needs to manually configure a...

ICMPv6 has two types: Error Messages and Information Messages.

The shortest path from the multicast source to the receiver is called the shortest path tree SPT.

RSTP defines four port roles. Among them, the Part role value of the Alternative port and the Backup port in the flags field of the STP packet is always 01.

The router-id is configured in both the system view and the BGP view of the router, since the BGP view has a higher priority, BGP uses the router-id in the BGP view.

In the BGP routing protocol, the asbr-summary command can be followed by the not-advertise parameter. The meaning of this parameter is not to advertise summary routes.

In the OSPF routing protocol, the unit of bandwidth-reference command is Mbps.

The value of the OSPF port cost is related to the bandwidth of the port. The calculation formula is bandwidth-reference/bandwidth. The cost is only calculated by OSPF itself and ca...

Which of the following statements about the forwarding plane of switching equipment is incorrect?

Regarding the following configuration commands for issuing default routes for each protocol, which of the description is wrong?

Which of the following description of the VRRP master device is wrong?

If there are two to connecting two or more switches to each other through dedicated connecting cables. For example, to connect two switches, you can directly connect the UP stack p...

A network engineer outputs the following information when troubleshooting OSPF protocol faults. <pre><code><Huawei>display ospf error interface GigabitEthernet 0/0/0 OSPF Process 1...

As shown in the figure, in a pure IPv6 environment, if you want to realize the communication between PC1 and PC2, which of the following groups of addresses can be configured on PC...

Which of the following statements is correct?

When using the RSTP protocol, and its related configuration information is shown in the figure. According to the command configuration, please point out that for instance 1, the ro...

The following is the description of a partial configuration of a router. The correct description of this configuration is: ``` [HUAWEI]acl number 2001 [HUAWEI-acl-basic-2001]rule 0...

Which of the following statement about OSPF neighbor information is wrong?

Based on the provided OSPF configuration for R1 and R2, which statement accurately describes their adjacency and route calculation capabilities?

Based on the figure, the forwarding of data traffic before roaming is STA->HAP->upper layer network, the forwarding method is direct forwarding, and the home agent is configured on...

As shown in the figure, SWA, SWB, and SWC all run RSTP. What are the port roles of the GE0/0/2 port on SWB and the GE0/0/1 port on SWC?

The following is part of the output information of the router RTB. Which is the wrong description of the output information?