Exam Questions Answers Braindumps H12-821_V1.0-ENU Exam Dumps PDF Questions [Q183-Q203]

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Exam Questions Answers Braindumps H12-821_V1.0-ENU Exam Dumps PDF Questions

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NO.183 If roaming is realized between two APs, the same security policy forwarding mode and the same () must be met. (If English words are involved, please use capital letters)

SSID

NO.184 Regarding the default routes of each protocol, which of the following description is wrong?

BGP can deliver default routes

ISIS can issue default routes

OSPF cannot deliver the default route

Static default routing can be configured

NO.185 RSTP provides different protection functions in different scenarios. Which of the following is wrong?

After the BPDU protection function is enabled on the switching device, if the edge port receives the RST BPDU, the edge port will be set as a non-edge port, and the spanning tree calculation will be performed again

After the anti-TC-BPDU packet attack function is enabled, the number of times the switching device processes TC BPDU packets in a unit time can be configured

The designated port with root protection function enabled, its port role can only be maintained as the designated port

Start the designated port of root protection. When the port receives a better RSTBPDU, the port will enter the Discarding state and no longer forward packets. If the port does not receive a better RST BPDU within a period of time, it will automatically return to the normal Forwarding state

NO.186 As shown in the figure, R1 and R2 form a VRRP backup group with VRID 12.

Now the user starts R1 one minute after starting R2, so which of the following descriptions about the default state of R1 is correct? (Multiple choice)

If the priority of R1 is changed to 100 and then restarted, the final master device will be R2

After R1 starts and stabilizes, the final master device is R1

After R1 starts and stabilizes, the final Master device is R2

If the R1 priority is changed to 100 and restarted, the final Master device is R1

NO.187 Which of the following description of BGP features is false?

BGP is an external routing protocol, which used to transfer routing information between ASs

BGP is a link state protocol

BGP has rich routing filtering and routing strategies

BGP supports CIDR

NO.188 Which of the following statements about the concept of multicast is wrong?

Multicast router: A router or a Layer 3 switch that supports Layer 3 multicast function

Multicast group: A collection identified by an IP multicast address

The group refers to the source, the sender of the information, and needs to join the multicast group to provide the forwarding of the group refers to the group message

Multicast group members, multicast group members can be widely distributed anywhere in the network

NO.189 Regarding the description of the characteristics of the routing strategy, the correct one is:

Apply the command policy-based-route

Forwarding according to the routing table based on the destination address

Manual hop-by-hop configuration is required to ensure that packets are forwarded according to policies

Based on the forwarding plane, serving the forwarding strategy

NO.190 Which of the following OSPF messages carries master-slave relationship information?

LSA Update message

LSA Request message

D message

Hello message

NO.191 As shown in the figure, the four Huawei switches have been running and configured with the MSTP protocol. Now it is necessary to set SW3 as the root bridge of Instance 10. Which of the following commands can be used to achieve this? (Multiple choice)

stp instance 10 root primary

stp vlan 10 root primary

stp instance 10 priority 4096

stp root primary

NO.192 Two hosts A and B are interconnected through the Internet. Now it is found that A can ping B but B cannot actively ping A.
Which of the following is the possible reason? (Multiple choice)

There is a loop between B and A

TTL timeout from B to A

A firewall is enabled on host A

B does not have a route to A, or does not set a gateway

NO.193 OSPF can support multiple network types. Which of the following network types need to elect DR and BDR? (Multiple choice)

NBMA

P2MP

BROADCAST

P2P

NO.194 Which of the following description about VRRP is wrong?

When using the protocol, you need to configure the virtual router number and virtual IP address on the router, and directly use the real MAC of the main router, so that a virtual router is added to the network

VRRP is a redundant backup protocol designed for local area networks (such as Ethernet) with multicast or broadcast capabilities. Instead, thereby maintaining the continuity and reliability of network communications

A virtual router consists of a main router and several backup routers. The main router implements the real forwarding function. When the main router fails, a backup router will become the new main router and take over its work

The host on the network communicates with the virtual router without knowing all the information about the physical router on the network

NO.195 In BGP, the community attribute is an optional transitional attribute, which is a routing label and is used to simplify the execution of routing policies.
It is divided into custom community attributes and public community attributes, so which of the following items belong to public community attributes? (Multiple choice)

No_Export

Internet

No_Advertise

No_Export Subconfed

NO.196 Which is the correct description of Route Policy is? (Multiple choice)

The if-match clause is used to match the node’s matching conditions, and the apply clause is used to define the routing behavior through filtering

The filtering rule relationship of the if-match clause is ” and “, that is, all i-match clauses of the node must match

The relationship between Route-Policy nodes is ” or “, as long as one node is filtered, the Route-Policy can be passed

A Route-Policy consists of multiple nodes. A section can contain multiple if-match and apply clauses

NO.197 In the N+1 backup network of WLAN, which of the following statements about the application of option43 is correct? (Multiple choice)

The command to configure the IP addresses of the active AC and the standby AC in the option43 parameter field of the DHCP server is option43 sub-0ption 2 ip-address ip-address &<1-8>

If the AC with the IP address advertised by option 43 does not respond to the AP, the AP will immediately fail to discover the AC

After configuring the option 43 field, the AP will only send unicast Discovery Request messages to the AC IP address advertised by option 43

To configure the option 43 field, you need to notify the AP of the IP addresses of its active AC and standby AC, and also need to notify the IP addresses of other active AC.

NO.198 Routes are imported into BGP through the import-route command. Which of the following descriptions is correct?

The import-route command can only import IGP routes and static routes into BGP

By default, the Origin value of imported routes is IGP

When the imported routing protocol is ISIS, the process number must be specified

import-route cannot cooperate with route-policy to filter routes imported into BGP by other routing protocols

NO.199 What advantages does the application of jumbo frames bring to communication? (Multiple choice)

Effectively improve forwarding efficiency in Gigabit Ethernet

Ensuring the integrity and reliability of data during network communication

Reduce the CPU usage of the device and improve the forwarding performance of the device

Reduce delay in video communication transmission, the impact of jitter on business

NO.200 Which of the following descriptions about the application of route reflectors in BGP are correct?
(Multiple choice)

The route learned by the RR from the non-client IBGP peer is advertised to all clients of this RR

The route learned by the RR from the client is only advertised to all non-clients of this RR

RR advertises the routes learned from EBGP peers to all non-clients and clients

When RR receives the route sent by the peer, it only selects the best route for reflection

NO.201 Which of the following statements about BGP security are correct? (Multiple choice)

Keychain authentication can be used between BGP neighbors to reduce the possibility of being attacked, and Keychain has a set of passwords, which can be automatically switched according to the configuration

When configuring the MD5 authentication password, if the simple option is used, the password will be saved in the configuration file in plain text, which poses a security risk

You can use the display bgp peer verbose command to view the authentication details of BGP peers

To prevent attackers from simulating real BGP protocol packets to attack the device, you can configure the GTSM function to detect the TTL value in the IP packet header

NO.202 The following is part of the output information of the Huawei router, regarding the output information, which of the following description is incorrect?

PIM-SM running on the gigabitethernet 1/0/0 interface of the router

The PIM state of the router gigabitethernet 1/0/0 running interface is UP

The router gigabitethernet 1/0/0 interface is running PIMv2

The DR on the interface is 10.1.1.1

NO.203 Which of the following descriptions about the P/A mechanism in RSTP are correct? (Multiple choice)

In RSTP, the main purpose of the P/A mechanism is to speed up the speed at which the upstream port enters the Forwarding state.

In RSTP, when the switch receives the RST BPDU with the Agreement bit set from the opposite end, it will immediately put the designated port into the Forwarding state

In RSTP, the main purpose of the P/A mechanism is to speed up the speed at which the downstream port enters the Forwarding state

In RSTP, all switches will send RST BPDU with the Proposal bit set in the initial state

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The HCIP-Datacom-Core Technology V1.0 certification is particularly relevant for IT professionals who work in the telecommunications, Internet, and network industries. HCIP-Datacom-Core Technology V1.0 certification demonstrates a deep understanding of the latest data communication technologies and best practices, as well as the ability to design, deploy, and manage complex data communication networks. The HCIP-Datacom-Core Technology V1.0 certification is also a stepping stone to higher-level certifications offered by Huawei, such as the HCIE-Datacom certification.

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