Huawei H12-891_V1.0-ENU Free Online Test: The Demo of Updated H12-891_V1.0-ENU Exam Questions

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1. An interface has the following configuration: isitimerhello5level-2. Which of the following descriptions is correct?

The CSNP packet sending interval for Level-2 on this interface is 5s.

The hello packet sending interval for Level- on this interface is 5s.

The hello packet sending interval for Level -2 of this interface is 5s.

The hello packet sending interval for Level-1 and Level-2 of this interface is both 5s.

Question 1 of 33

2. Which of the following descriptions of MPLS label space is wrong?

When the penultimate hop LSR performs label exchange, if it is found that the exchanged label value is 3, the label will be popped up by default and the packet will be sent to the last hop.

16~1023 is the label space shared by static LSP and static CR-LSP

If the outgoing label value is 0, the router will directly discard the packet.

Above 1024 is the label space shared by dynamic signaling protocols such as LDP, RSVP-TE, MP-BGP and so on.

Question 2 of 33

3. After the interface Sticky MAC function is enabled on the device, what is the number of MAC addresses learned by the interface by default?

Question 3 of 33

4. In the firewall dual-machine hot standby scenario, when VGMP is working in load sharing mode, in order to avoid the return traffic being discarded because it does not match the session table entry in the scenario where the round-trip paths are inconsistent, what functions do the firewall need to enable?

Session quick backup

Manual batch backup

Automatic backup

Turn on BFD detection

Question 4 of 33

5. Which of the following descriptions of Underlay in VXLAN virtualized campus applications is wrong?

When using IMaster NCE-Camspus to implement automatic orchestration of Underlay network routing domains, only OSPF routing protocol is supported.

The virtualized campus solution uses VXLAN technology and adopts MAC IN UDP encapsulation method to virtualize a layer of logical network on the traditional IP network.

The underlay network implements IP reachability so that VXLAN-encapsulated service packets can be communicated between VTEP nodes.

When using IMaster NCE-Campus to implement automatic orchestration of Underlay network routing domains, only single-area deployment of routing protocols is supported.

Question 5 of 33

6. Which of the following descriptions of BGP/MPLSIPVPN routing interactions is wrong?

PE and CE exchange IPv4 routing information.

The egress PE can send IPv4 routes to the remote CE through BGP, IGP or static routing.

The ingress PE changes the IPv4 routes received from the CE into VPNv4 routes and saves them according to different VPN instances.

After receiving the VPNv4 routes advertised by the ingress PE, the egress PE filters the VPNv4 routes based on the RT attributes carried by the routes.

Question 6 of 33

7. In the following MPLSL3VPN cross-domain solution, which one of the VPNv4 routes needs to be transmitted between ASBRs?

Option B

Option D

Option A

Option C

Question 7 of 33

8. Which of the following BGP routing attributes cannot control BGP route selection?

Originator ID

MED

AS_Path

Community

Question 8 of 33

9. In the scenario of dynamically establishing a VXLAN tunnel through BCP EVPN, when using BGP EVPN Type2 routing for host MAC address advertisement, which of the following descriptions is correct?

It will carry specific L2 VNI and L3 VNI values at the same time.

Will carry specific L3 VNI value

The RT value carried is the Export RT in the IP VPN instance.

The IP Address and IP Address Length fields will not carry specific content.

Question 9 of 33

10. There are three different roles in strategic linkage. Which of the following is not a role defined in strategic linkage?

Authentication execution point

Authentication Control Point

Policy execution point

Terminal

Question 10 of 33

11. A company's headquarters network and branch network are interconnected through the Internet. If you want to use VPN technology to ensure safe and reliable data transmission between headquarters users and branch users, which of the following VPN technologies is the most suitable?

IPsec VPN

SSL VPN

L2TP VPN

MPLS VPN

Question 11 of 33

12. In the scenario of dynamically establishing a VXLAN tunnel through BGP EVPN, when EVPN Type2 is used to advertise host ARP and host IP routes respectively, which option is wrong in the following description?

Both carry L2 VNI

Both carry host IP information

Both carry L3 VNI

Both carry MAC information

Question 12 of 33

13. In the campus network, in order to facilitate the management of servers, printers, video surveillance and other equipment, which of the following methods is recommended for address allocation?

DHCP dynamically obtains a non-fixed IP address

Use BOOT protocol to dynamically obtain an IP address

Use PPPoE authentication and perform address binding during authorization

DHCP static address allocation based on MAC address

Question 13 of 33

14. For scenarios where advanced security functions such as UR filtering, IPS, security defense, and AV anti-virus need to be supported, and multi-link uplink needs to be supported, which of the following can be selected for the egress device?

Question 14 of 33

15. Which of the following options is not the discarding strategy of the cache queue?

Tail discard

WRR

RED

WRED

Question 15 of 33

16. There are many types of token buckets. Which type of token bucket should be used for long-term burst traffic?

Double bucket double speed token bucket

Single bucket double speed token bucket

Single bucket single speed token bucket

Single bucket double speed token bucket

Question 16 of 33

17. How many bits are there in the MPLS label field?

Question 17 of 33

18. Which of the following is the meaning of the ipv6 enable topology ipv6 command in IS-IS protocol view?

IPv4 and IPv6 use the same topology for SPF calculation

SPF calculation is performed separately in IPv4 and IPv6 topologies.

SPF calculation for IPv6 routing is not supported

Does not have any meaning

Question 18 of 33

19. When the network administrator tried to access the internal network device through Telnet, he found that he could not access it. Which of the following reasons is impossible?

The route is unreachable and the client and server cannot establish a TCP connection.

ACL is bound in the VTY user interface

Protocol inbound all is configured in the VTY user interface.

The number of users logged into the device has reached the upper limit.

Question 19 of 33

20. When troubleshooting MSTP, the network administrator executed the display current-configuration command to obtain the configuration file of the device. Which of the following description of troubleshooting ideas is wrong?

Whether the MSTP port connected to the user terminal device is disabled or configured as an edge port

Check whether the device port is added to the correct VLAN

Regardless of whether BPDU Tunnel is configured on the device, it will not affect STP.

Check the port configuration and confirm whether the protocol packet sending command is enabled on the STP-enabled port, such as bpdu enable

Question 20 of 33

21. Which of the following descriptions about the purpose of configuring LSP fragmentation on IS-IS equipment is correct?

Prevent the device from learning IS-IS routing information

Without any practical purpose

Prevent the device from establishing IS-IS neighbors

Allow the device to support more IS-IS routing entries

Question 21 of 33

22. Which of the following NAT64 prefixes does not require manual configuration by the administrator?

64:FF9B::/32

64:FF9B::/16

64:FF9B::/64

64:FF9B::/96

Question 22 of 33

23. SR-MPLS Policy needs to introduce business traffic into the tunnel for forwarding. If there are different business traffic going to the same destination address, in order to better ensure the quality of different services, which of the following traffic diversion methods is best to use?

Drainage based on quintuple

Driving traffic based on End Point

Traffic diversion based on DSCP

Driving traffic based on Color

Question 23 of 33

24. The default priority of VRRP devices in the backup group is?

100

150

200

Question 24 of 33

25. Regarding the description of MAC address spoofing attack, which of the following statements is correct?

A MAC address spoofing attack will cause the data that the switch intends to send to the correct destination to be sent to the attacker.

An attacker can implement a MAC address spoofing attack by sending forged source Mac address data frames to the switch.

MAC address spoofing attacks mainly utilize the switch’s Mac address learning mechanism.

MAC address spoofing attacks will cause the switch to learn the wrong mapping relationship between Mac addresses and IP addresses.

Question 25 of 33

26. Regarding the description of configuring the security level of the firewall security zone, which of the following statements is correct?

For the newly created security zone, the system default security level is 1.

The security level can only be set for customized security zones.

In the same system, two security zones are not allowed to configure the same security level.

Security level - once set, no changes are allowed

Question 26 of 33

27. Regarding the description of Network Address Port Translation (NAPT) and Network Address Only Translation (No-PAT), which of the following statements is correct?

After NAPT conversion, for external network users, all packets will only come from the same IP address.

No-PAT supports protocol address translation at the network layer

NAPT only supports protocol address translation at the network layer

No-PAT only supports protocol port conversion at the transport layer

Question 27 of 33

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

For a designated port with root protection enabled, its port role can only remain as a designated port.

After enabling the anti-TC-BPDU packet attack function, the number of times the switching device processes IC BPDU packets within a unit time can be configured.

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

Enable root protection on the designated port. When the port receives a better RST BPDU, 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.

Question 28 of 33

29. Which of the following descriptions about DHCP Snooping is wrong?

If the DHCP Snooping function is enabled in the interface view, all DHCP message command functions under the interface will take effect.

DHCP Snooping can prevent illegal attacks by setting trusted ports

Enable DHCP Snooping globally. Without any post-parameters, the device only processes DHCPv4 messages by default.

If the DHCP Snooping function is enabled in the VLAN view, the command function will take effect on the DHCP messages belonging to the VLAN received by all interfaces of the device.

Question 29 of 33

30. Which of the following descriptions of BGP/MPLS IP VPN network architecture is wrong?

The P device only needs to have basic MPLS forwarding capabilities and does not maintain VPN related information.

Under normal circumstances, CE devices are not aware of the existence of VPN, and CE devices do not need to support MPLS, MP-BGP, etc.

The BGP/MPLS IP VPN network architecture consists of three parts: CE (Customer Edge), PE (Provider Edge) and P (Provider). PE and P are operator equipment, and CE is BGP/MPLS IP VPN user equipment.

Sites can access each other through VPN, and a site can only belong to one VPN.

Question 30 of 33

31. The default sending interval of BFD detection packets is?

1000ms

10s

100ms

Question 31 of 33

32. What is the default lease period of the DHCP address pool?

1 month

1 hour

1 day

1 week

Question 32 of 33

33. In scenarios with dense rooms such as dormitories, hotels, and wards, deploying an AP in each room will cause a large number of packets to be sent to the AC, which can easily cause performance bottlenecks on the AC. In order to cope with this challenge, which networking architecture can be adopted?

FAT AP

Leader AP

Agile distributed AP

AC+FIT AP

Question 33 of 33

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