初心者向けのH12-821_V1.0試験 [2026] 問題集でHuaweiのPDF問題 [Q32-Q56]

質問32、 Which of the following descriptions about ABR in OSPF is wrong?

The ABR converts Type 1 and Type 2 LSAs in the connected non-backbone area into Type 3 LSAs and advertises them to the backbone area

ABR cannot generate Type 4 and Type 5 LSAs

There are multiple LSDBs on the ABR, and the ABR maintains an LSDBD for each area.

ABR converts Type 1, Type 2 LSA and Type 3 LSA in the backbone area into Type 3 LSA and publishes them to the connected non-backbone area

質問33、 In the VRP system, which of the following descriptions about OSPF cost (Cost) is wrong?

Cost takes effect in the incoming direction of traffic on the interface

The default cost value of the Loopback interface is 1

Modifying the reference bandwidth of OSPF will affect all local interface overheads in OSPF

OSPF will automatically calculate the cost value based on the bandwidth of the interface. The calculation formula is interface cost-bandwidth reference value / interface bandwidth

質問34、 STP ensures a loop-free network but has a slow network topology convergence speed, affecting communication quality. RSTP has made some improvements based on STP. Which of the following improvements is not included?

If a port does not receive configuration BPDUs from the upstream device within four Hello intervals, the switch considers that the negotiation with the neighbor fails.

The non-root switch running RSTP sends configuration BPDUs at the interval specified by the Hello timer, which is performed independently by each device.

RSTP reduces five port states to three port states based on user traffic forwarding and MAC address learning.

RSTP deletes three port states and adds two port roles.

質問35、 See the following figure. RTA, RTB, RTC, and RTD are in the same AS and establish IBGP peer relationships through direct links. RTB an RTC are route reflectors (RRs), RTA and RTC are the RR clients of RTB, and RTB and RTD are the RR clients of RTC. If RTA advertises the route 10.1.1.0/24 to the BGP process, the Originator ID of the BGP route received by RTD is——————.

質問36、 For the same multicast source, the device can determine the only multicast traffic incoming interface on the device through RPF inspection.

TRUE

FALSE

質問37、 RTA is the source DR router, and RIB is the RP router. The multicast source sends group blessing data to RTA, but the group blessing source Source registered with it through the PIM Register message cannot be seen on the RIB. The possible reasons are as follows: (Multiple choice)

There is no single-finger route from RTB to RTA, which causes RIB to fail the RPF check of the source

The multicast network dynamically elects RP, but RTA fails to check the RPF of BSR

The RP elected by RTA is not RTB

The multicast network is statically configured with RP, but the RTA router is not statically configured with RP

質問38、 R1 contains the configuration shown in the figure.
Isis 1
Cost-style wide
Network-entity 49.0022.ee8c.a0c2.baf2.00
Which option is correct for the following description of IS-IS process 1?

The device type of R1 is Level-1

The device type of R1 is Level-2

The device type of R1 is Level-1-2

The device type of R1 cannot be determined

質問39、 Which of the following statements regarding multicast MAC addresses are false?

One multicast MAC address maps to 32 multicast IP addresses.

One multicast MAC address maps to only one multicast IP address.

The high 24 bits of the multicast MAC address are 0x01005E, the 25th bit is fixed to 1, and the lower 23 bits of the MAC address map to the lower 23 bits of the multicast IP address.

A multicast MAC address identifies receivers of a multicast group on the data link layer.

質問40、 The advantage of IS-IS messages using the TLV structure is that it has better scalability. To add new features, you only need to add a new TLV, and there is no need to change the overall structure of the entire message.

TRUE

FALSE

質問41、 On a network, some switches are enabled with RSTP and some switches are enabled with STP.
What will happen?

A Huawei switch changes from RSTP to STP. After the STP-enabled switch is removed from the network, the RSTP-enabled switch can be moved back to the RSTP mode.

A Huawei switch changes its mode from STP to RSTP. After the RSTP-enabled switch is removed from the network, the STP-enabled switch can be moved back to the RSTP mode.

STP and RSTP are compatible with each other, but the rapid convergence of RSTP is unavailable.

STP and RSTP calculation are performed independently.

質問42、 Which of the following IP address ranges are not multicast address ranges? (Multiple choice)

192.168.0.0~192.168.255.255

239.0.0.0~239.255.255.255

168.1.0.0~168.1.255.255

224.0.0.0~ 224.0.0.255

質問43、 Regarding BGP Local-Preference, which of the following descriptions are correct? (Multiple choice)

The default value of BGP route Local-Preference is 100

The default value of BGP routing Local-Preference is 0

In the BGP route selection rules, Preferred-value has a higher priority than Local-Preference, that is, Preferred-Value is compared preferentially

In the BGP route selection rules, the priority of MED is higher than that of Local-Preference, that is, priority is given to comparing MED

質問44、 The networking diagram of a certain IS-IS is as shown in the figure.

According to the content analysis in the figure, which one of the following descriptions is wrong?

The LSDB of Level-2 of the R6 device only contains the routing information of this area.

The LSDB of Level-1 of the R1 device only contains the routing information of this area.

R2 and R1 form a Level-1 adjacency relationship, and R2 and R4 form a Level-2 adjacency relationship.

R1 can access R4 through R2 or R3

質問45、 An IP prefix list is a common matching tool in routing policies. When an IP prefix list is configured on a Huawei router, which of the following parameters are optional?

Index of the prefix list

Longest mask length to be matched

Shortest mask length to be matched

Mask length

質問46、 ON a stateful inspection Firewall where there is no session table, when the status detection mechanism is enabled and the second packet (CYN+ACK) of 3-way hadshakes reaches the firewall. Which of the following statements is true?

By default, when status detection is disabled and the permit policy is configured packets can pass.

If the firewall security policy permits packets to pass, the session table is created.

Packets must pass the firewall, and a session table is established.

If the firewall security policy permits packets to pass, the packets can pass the firewall.

質問47、 Which of the following descriptions of BGP features are correct? (Multiple choice)

Able to carry large amounts of routing information and support large-scale networks

Periodic routing updates

Can support MPLS/VPN applications and deliver customer VPN routes

Use TCP as the transport layer protocol

質問48、 On a broadcast or NBMA network, not all neighbors will establish adjacency relationships.

TRUE

FALSE

質問49、 Link aggregation is a common network technology. Which of the following are advantages of link aggregation?

Load balancing

Improved reliability

Increased link bandwidth

Route backup

質問50、 Which of the following descriptions about BGP are correct? (Multiple choice)

When BGP establishes a neighbor relationship, the necessary parameters are negotiated through Notification messages.

When BGP establishes a neighbor relationship, it must first complete the TCP three-way handshake.
Otherwise, the neighbor relationship cannot be established.

BGP uses Keepalive messages to keep the TCP connection valid. The default Keepalive sending period is 60 seconds.

BGP uses TCP port 179 for communication.

質問51、 By default, in the VRP version, when the BGP neighbor ingress routing policy (route-policy) changes, refresh will be automatically sent to the neighbor to request the neighbor to resend an Update message.

TRUE

FALSE

質問52、 The traffic policy supports calling on the interface, but only supports calling the traffic policy in the outbound direction of the interface.

TRUE

FALSE

質問53、 To prevent the system from misjudging roaming with the same VLAN ID but in different subnets as Layer 2 roaming, you need to use the roaming domain to determine whether the devices are in the same subnet. If they are the same, it is Layer 2 roaming, and vice versa. layer roaming.

TRUE

FALSE

質問54、 As shown in the figure, both SWA.SWB.SWC run RSTP.

What is the port role of GE0/0/2 port on SWB and GEO/0/1 port on SWC?

Alternative port, Backup port

Backup port, Root port

Root port, Designated port

Backup port, Alternative port

質問55、 Configure OSPF area 10 as a Totally NSSA area. The commands that need to be configured are:
[Huawei] ospf 1
[Huawei-ospf-1] area 10
[Huawei-ospf-1-area-0.0.0.10] nssa ______

質問56、 In BGP, Keepalive messages are used to maintain BGP peer relationships. When a BGP router receives a Keepalive message from a peer, the BGP router sets the state of the peer to Established and periodically sends Keepalive messages to maintain the connection. By default, the device sends Keepalive messages every seconds.