[Aug 18, 2022] H12-261_V3.0 Exam Dumps, H12-261_V3.0 Practice Test Questions [Q103-Q122]

H12-261_V3.0 Huawei

admin • August 18, 2022

[Aug 18, 2022] H12-261_V3.0 Exam Dumps, H12-261_V3.0 Practice Test Questions [Q103-Q122]

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[Aug 18, 2022] H12-261_V3.0 Exam Dumps, H12-261_V3.0 Practice Test Questions

Free H12-261_V3.0 Study Guides Exam Questions and Answer

QUESTION 103
Which of the following statements about the tail of ISIS protocol LSP packets is correct?

LSP fast diffusion feature, first diffuse LSPs less than the specified number to speed up the synchronization process of LSDB

by configurationAn intelligent timer generated by LSP, which can automatically adjust the delay time according to the changing frequency of routing information

When the link state information increases, the packet length of the LSP can be increased, so that each LSP can carry more information.

Decreasing the minimum time interval for sending LSPs by port can speed up the diffusion of LSPs.

QUESTION 104
IPSG can statically configure the binding table, orDHCP-Snooping is used together to form a binding table

True

false

Explanation
DHCP Snooping isDHCP A security feature of , mainly used in switchThe function is to shield the illegal DHCP server in the access network. combineDAI (Dynamic ARP Inspection)and IPSG(IP Source Guard) can realize ARP anti-spoofing and IP flow controlcontrol function.

QUESTION 105
The OSPF protocol runs on a company’s network. An engineer performs packet diversion operations on the network in order to gain a deeper understanding of the OSPF mechanism. Which of the following descriptions about OSPF packets is correct?

Add interface to OSPSend Hello message immediately after area F

LSUpdate packets are only sent when adjacency is established

After receiving the LsUpdate message, the router must send LsAck to confirm

LS Update packets synchronize the link state database by sending detailed LSA information

Explanation
LSUpdate: The LSU packet is used to send the LSA it needs to the peer device or to flood the updated LSA of the local end. The content is a collection of multiple LSAs (all contents). In order to achieve reliable transmission of flooding, an LSAck packet is required to Confirmation, for those who have not received the confirmation messageLSAFor retransmission, the retransmitted LSA is sent directly to the neighbor.
LSACK: The LSAck packet is used to confirm the received LSU packet, and the content is the header of the LSA to be confirmed (one LSAck packet can confirm multiple LSAs).
After receiving the LSU message, depending on the situation, what is returned to the other party is different, not just the LSACK message, as follows:
if LSThere is no such entry in the DB, it is added to the LSDB, a link state acknowledgment (LSAck) is returned, and this information is diffused to other routers, running the SPF algorithm and updating their routing tables.
ifIf there is such an entry in the LSDB and the information contained in the LSU is the same, it is ignored.
ifIf there is such an entry in the LSDB, but the information contained in the LSU is updated, it is added to the local LSDB, an LSAck is returned, and the information is diffused to other routers, SPF is run, and its routing table is updated.
ifIf there is such an entry in the LSDB, but the information contained in the LSU is older, an LSU containing the new information is sent to the sender.

QUESTION 106
Which of the following are the advantages of using stacking and clustering technologies to build a campus network?

The business interruption time is greatly reduced

Can effectively reduce network power consumption

Simplify network management and reduce the complexity of network deployment planning

Improve network sound setting and link utilization

QUESTION 107
BGP can only automatically aggregate routes imported locally through the Import-route command.

TRUE

FALSE

QUESTION 108
IPv6 introduces Solicited-Node address, the following description about this address is correct: ( confirmed)

This is a specific address used in ARPv6 to resolve MAC addresses.

Solicited on router interface -Node addresses are automatically generated, and there can be more than one.

If Solicited is not configured-Node address, the router will automatically generate one on each interface.

IPv46 Introducing Solicited-Node address is to support IPv6 multicast.

Explanation
ask- Node multicast address (solicited-node multicast address) requested-The multicast address of the node is the multicast address of the requested node, which is assigned a Target address (that is, the address that is undergoing address resolution or duplicate address detection), targeting the requested-node multicast address.
Address (Destination Address) will be multicast to this node.

QUESTION 109
As shown in the figure, the ISIS overload bit is set in the configuration of router R3. Which of the following statements is correct?

When the router’s memory is insufficient, the system automatically sets the overload flag in the sent LSP message, regardless of whether the user has configured the set-overload command.

The routes imported by R3 through import-route cannot be published.

R3 starts the overload state, R1 and R2 will not calculate the LSP generated by R3 in the SPF tree. The direct route of D, R3 will be ignored by R1 and R2 because the setting of the overload bit will be ignored.

The LSP of R3 will not be able to diffuse to R1 and R2

QUESTION 110
Which of the following descriptions is wrong about the OSPFv3 protocol?

In the case of sharing a router, each OSPFv3 process runs independently

Multiple instances can run in the same OSPFv3 process under the same interface

Can support running multiple instances on a single link

OSP the Fv3 packet header will contain the Interface ID field

QUESTION 111
What is the most efficient way to pass view device alarms via CLI?

display alarm

display current- configuration

display interface brief

display clock

QUESTION 112
An engineer uses 2 routers to test IPv6 services, runs 0SPFv3 to realize interconnection of IPv6 networks, and requires R1 to be able to access the loopback interface address of R2. The engineer checks the OSPFv3 routing table entry of R1 as shown in the figure and finds that there is no route to the loopback interface address of R2.
Which of the following reasons cannot be caused?

R2 does not configure the Router ID used in the OSPFv3 process

R2 advertises the loopback interface into different OSPFv3 processes

R2 does not use network to advertise the loopback interface address in area 0

R2 does not enable OSPFv3 on the loopback interface

QUESTION 113
Router A has an IP routing entry with the destination network segment 10.0.0.1/32 and the outbound interface GigabitEthernet0/0/1. Now add the following configuration: acl numberr 2000 rule 10 permit source 10.0.1.1 traffic classifier test if-match acl 2000 traffic behavior test remark dscp cs3 traffic policyy test classifier test behavior test interface GigabitEthermet0/0/1 ip address 10.0.12.1 255.255.255.0 traffic-policy test outbound Assuming that router A receives a packet with destination IP 10.0.0.1, which of the following statements are correct:

If the source IP address of the packet is 10.0.1.2, it can be forwarded, and at the same timeDSCP field is marked as CS3

If the packet source IP address is 10.0.1.1, it can be forwarded, and the DSCP field is marked as CS3

If the source IP address of the packet is 10.0.1.2, it cannot be forwarded

If the source IP address of the packet is 10.0.1.2, it can be forwarded, and at the same timeDSCP field remains unchanged

Explanation
In the test policy, if the matching source address is 10.0.1.1, the remarked dscp value is cs3. If it does not match, it will be forwarded normally.

QUESTION 114
four routersR1, R2, R3 and R4 run ISIS, The ISIS router type has been marked in the figure, and the area addresses of the four routers are all 49.0001.The result of checking the routing table on R1 is as follows. The reason why R1 does not reach the route to 10.34.34.4 is because

The routing policy configured on R2 filters out the default route

System-ID of R2 andR3 conflict

Territorial planning errors for R3 and R4

System-ID of R2 andR1 conflict

QUESTION 115
Community-filter has two types of basic community attribute filters and advanced community attribute filters.
Which of the following filter tools makes the advanced groupAre gender filters more flexible than basic community attribute filters for matching community attributes?

IP-prefix

AS-path-filter

Regular-expression

ACL

Explanation
Regular-expressionregular expression

QUESTION 116
BGP4+ carries the next-hop address of the IPv6 route through the next-Hop attribute in the Update packet.

TRUE

FALSE

Explanation
should be MP-Reach-NLRI

QUESTION 117
Which of the following BGP attributes is not a BGP routeUp date. What must be included in the message?
(multiple choice)

AS PATH

NED

Oorigin

Local -Preference

QUESTION 118
The following about OSPFv3Router-LSA, which statement is correct?

The data area of the Router-LSA contains the Link-Local address

The data area of the Router-LSA contains the interface of the local neighbor ID

Similar to OSPFv2, the Option field exists in the LSA header instead ofRouter-LSA data area

When L in the header of LSAS When type=0x0001, the data area representing LSA isRouter-LSA

QUESTION 119
Which of the following descriptions about the OSPF protocol are correct?

AS-External-LSA does not belong to any area

The cost value of the second type of external route is only the AS external cost value, ignoring the AS internal cost value

AS-External-LSA describes the path to the AS external route, and the flooding range is AS external

AS-External-LSA Describes the path from the router to the ASBR

QUESTION 120
Which of the following descriptions is correct about the FTP protocol?

existFTP In Passive mode, the client completes the control and dataInitialization of a TCP session

existFTP In Active mode, the server side passes the command”PORT” to tell the client which port it expects to send data on

FTP always uses one TCP session to transfer control information and data information

FTP always uses TCP port 20 for data sessions and ICP port 21 for control sessions

FTP always uses TCP port 21 for data sessions and TCP port 20 for control sessions

Explanation
FTP (File Transfer Protocol, file transfer protocol) YesTCP/IP One of the protocols in the protocol group.The FTP protocol consists of two componentspoints, one of which isThe FTP server, and the second is the FTP client.
By default, the FTP protocol uses two TCP ports, 20 and 21, where 20 is used to transmit data and 21 is used to transmit control information. However, whether to use 20 as the port for data transmission is related to the transmission mode used by FTP. If the active mode is used, the data transmission port is 20; if the passive mode is used, the specific port to be used is determined by the server and the client through negotiation.

QUESTION 121
As shown below,R1, R2, R3 established Level2’s neighbor relationship. aboutR3’s IP routing table statement is correct:

The 2022::/64 route will appear in the IP routing table

The 2019::/64 route will appear in the IP routing table

The 2020::/64 route will appear in the IP routing table

The 2021::/64 route will appear in the IP routing table

QUESTION 122
Which of the following statements about the BFD single-arm echo function is correct

BFDThe one-arm echo function must configure the local identifier and the terminal identifier

BPThe default destination IP address of the protocol packet of the D one-arm echo is 224.0.0.184

BAfter the FD one-arm echo function is enabled, the destination IP and source IP of BFD packets are the same

BFDThe one-arm echo function is suitable for scenarios where one device supports BD and the other device does not.

BFDThe one-arm echo function detects the connectivity of the forwarding link through the loopback operation of BFD packets.
Among two directly connected devices, one device supports the BFD function, and the other device does not support the BFD function and only supports basic network layer forwarding. To quickly detect the fault between the two devices, you can create a BFD session with the one-arm echo function on the device that supports the BFD function. A device that supports the BFD function actively initiates the echo request function, and a device that does not support the BFD function directly loops back the packet after receiving it, thereby implementing the connectivity detection function of the forwarding link.
One-arm detection Huawei equipment will send one to the opposite end every 3S or soUDP packet, the source IP and destination IP in the packet are the IP of their own interface

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