Provide Huawei H12-891_V1.0 Dumps Updated Nov 27, 2023 With 610 QA's [Q57-Q79] : Free Exam Dumps Collection : http://free.examcollectionpass.com

Q57. Which of the following does the digital certificate not contain?

Digital envelopes

Issued by

Digital signature

Public key information

Q58. Which of the following options can affect the establishment of IBGP neighbors?

iBGP-Multi-hop is not configured

Authentication is unsuccessful

IGP routing is not passable

BGP protocol version inconsistencies

Q59. When configuring the source NAT and having no pat configuration parameters, which of the following statements is true?( Radio)

Perform destination IP address and destination port translation

Only source P address translation occurs

Only destination IP address translation occurs

Simultaneous source P address and source port translation

Q60. If four routers run ISIS and have established an adjacency relationship, and the area code and router rank are marked as shown in the figure, what is the cost value of R4 reaching 10022/32?

Q61. Regarding the description of the encapsulation format of the labels in MPLS, the correct one is ?

The TTL field in the label has a similar meaning to the TTL (Time To Live) in the IP packet, and also has the effect of preventing loops

The total length of an MPLS single tag is 4 bytes (32 bits).

For Ethernet, PPP packets, the tag stack is like a “cushion layer”, located between the layer 2 header and the data, and when there is a VLAN tag, the MPLS header is placed on the Ether head and VLANtag between

label in the S field, lbit Used to identify whether the label is a bottom label, and a value of 1 indicates that it is the penultimate label

Q62. Regarding BGP route filtering, the following description is wrong?

The filtering relationship between Route-Policy’s noodes is “or.” “, that is, as long as a node filter is passed, it can pass through the Route-policyo

For routes published locally, configure a routing policy that takes effect before the route is added to the BGP route table.

In the same node of Route-Policy, multiple if-match clauses for different attributes are “or” relationships.

When a route to a BGP peer is received, a routing policy is enforced to filter unwanted BGP routes that are not added to the local BGP routing table.

Q63. The HTTP protocol is based on TCP, so http Flood attacks can be defended against HTTP Flood attacks using the TCP Flood attack prevention method.

True

False

Q64. You want to set the DSCP value of VolP traffic in HW network devices to EF. According to the differentiated service model RFC, traffic token EF should be set to:

DSCP is set to decimal 36

IP ToS is set to OXEF

IP Experimental ECN

DSCP is set to decimal 5

Bitstream 101110

Q65. As shown in the figure, there are two IP6 networks that can access the IPv4 network, and the IPsec tunnel needs to be established between the two IPv6 networks to communicate, which of the following requirements?(). Single choice questions).

ESP + tunnel mode

AH + transmission mode

AH + tunnel mode

None of the above options are correct

Q66. The following statement about OSPF route filtering is incorrect.( Single choice questions).

In the NSSA area, filtering for external route ingestion and advertisement can be configured on ASBR or ABR

Filtering for the three types of LSAs needs to be configured on the ABR across OSPF regions

Interface-based filtering of LSAs allows all LSAs in the inbound and outbound directions except grace LSAs

Based on the link state database, when calculating routes, the fiter-policy import command is used, which only affects the route addition in the route table, and has no effect on the OSPF link state database

Q67. When the IPv6 address of a host is configured with a stateless address configuration, and other parameters other than the address are obtained through DHCPv6, how to set the M and 0 bits in the RA message ?

M=10=1

M=10=0

M=1 0=0

M=00=1

Q68. The message types of ISIS mainly include SNP, IIH, and LSP

True

False

Q69. There is a concept of FEC-Forwarding Equivalence Class in MPLS, so what criteria can FEC not allocate based on?

Application Protocol

Class of Service

Destination Address

Fragment offset

Q70. View the details of all VPN instances on a network device and the results are as follows, which of the following statements is wrong?( Multiple choice questions).

The total number of instances that enable the IPv6 address family in the VPN configured on this side is 1.

VPN-Instance vpna does not receive VPN routes with an RT of 2:1.

The GigabitEthernet 1/0/0 interface is tied to the VPN-Instance vpna

The device assigns a label to each route of the VPN-Instance vpna.

Q71. What kind of scenario can use AS one path and one filter?

Filter routes received from BGP neighbors based on the AS PATH attribute that the route carries. For example, the command peer x.X.x.x as path-filter import

The apply clause in Routepolicy

Filter routes sent to BGP neighbors based on the AS PATH attribute that the route carries. For example, the command peerx. X.x.x as path-filter export

If-natch clause answer in Route-policy.

Q72. In broadcast networks, elections to DIS begin only after a neighbor relationship has been established

True

False

Q73. The following statement about RSTP root protection is correct?

Turning on root protection on the root port takes effect

The port that turns on the root protection receives the RST BDPU with a higher priority and will enter the error-down state

It is recommended that you turn it on on a switch that is at the edge of the network

After opening the root-protected port and receiving the RSTBPDU with a higher priority, if it does not continue to receive the RSTBPDU with a higher priority for a period of time, it will return to the normal forwarding state

Q74. How do 8021w and 8021D handle BPDUs?( Confirmed) The

8021D bridge only forwards BPDU packets received from the root bridge

The 8021D bridge does not forward BPDU messages

The 8021w bridge forwards only BPDU packets received from the root bridge

8021w Bridge does not forward BPDU packet

Q75. What are the three ways to send IPv4 messages?

broadcast

Unicast

Multicast

Any broadcast

Q76. The correct description of the scene shown in the following figure is:

LSDB

R1, which exists in both Level-1 and Leve-2, can ping the interface address of R2 loopback0

R there is a route to R2 loopback0 100

No neighbor relationship can be established between R1 and R2

Q77. Level-1-2IS transmits Level-2LSP to the Level-1 area if the AT location 1 in Level-2LSP is delivered It means that the Level-1lS in the area can be accessed to the outer area through Level-1-2IlS

True

False

Q78. The following statement about a cross-domain MPLS VPN is mischaracteristic?

When the public network tag is LDP only , for cross-domain VPN-optionC scenario 2, a three-layer tag is required in the packet forwarding process.

For the cross-domain VPN-OptionB approach, an MP-eBGP neighbor relationship needs to be established between the two ASBRs.

For the cross-domain VPN-OptionA mode, the route passed between the two ASBRs is a normal IPv4 route.

For the cross-domain VPN-OptionB approach, two ASBR-PEs are interconnected with multiple interfaces (including sub-interfaces), each associated with a VPN, each ASBR PE treats the peer as a CE.

Q79. The main routing policy tools that BGP can use are Filter-policy and Route-policy, where Fate-policy can only filter routes and Route-policy can only modify routes

TRUE

FALSE