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Huawei H12-891 Practice Test - Questions Answers, Page 23

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Regarding the Stub region in the OSPF protocol, the following statement is correct.

A.
Virtual connections cannot traverse the Stub region
A.
Virtual connections cannot traverse the Stub region
Answers
B.
Backbone zones cannot be configured as Stub zones
B.
Backbone zones cannot be configured as Stub zones
Answers
C.
ASBR cannot exist in the Stub zone
C.
ASBR cannot exist in the Stub zone
Answers
D.
Type7 LSA injection is not allowed in the Stub zone
D.
Type7 LSA injection is not allowed in the Stub zone
Answers
Suggested answer: A, B, C, D

Because BGP is an EGP routing protocol, BGP routing policies can only be deployed between EBGP neighbors, and routing policies between IBGP neighbors are not valid.

A.
TRUE
A.
TRUE
Answers
B.
FALSE
B.
FALSE
Answers
Suggested answer: B

An advanced access control list is a sequence of rules consisting of permit |deny statements that can match IP messages based on which attributes ?(). Multiple select).

A.
Destination port number
A.
Destination port number
Answers
B.
Source address
B.
Source address
Answers
C.
Destination address
C.
Destination address
Answers
D.
Source port number
D.
Source port number
Answers
Suggested answer: A, B, C, D

The basic header length of an IPv6 message is a fixed value.

A.
TRUE
A.
TRUE
Answers
B.
FALSE
B.
FALSE
Answers
Suggested answer: A

Regarding the site in the BGP/MPLSIP VPN network architecture, the following description is correct?

A.
Under no circumstances can different sites that belong to the same VPN use overlapping address spaces
A.
Under no circumstances can different sites that belong to the same VPN use overlapping address spaces
Answers
B.
Two geographically separated networks must belong to different sites
B.
Two geographically separated networks must belong to different sites
Answers
C.
Terminals connected to the carrier network through the same CE may belong to different sites
C.
Terminals connected to the carrier network through the same CE may belong to different sites
Answers
D.
A site is a set of IP systems, and a network of hosts cannot be called site
D.
A site is a set of IP systems, and a network of hosts cannot be called site
Answers
Suggested answer: A, B, C, D

In MPLSVPN, in order to distinguish between IPv4 prefixes that use the same address space, the RD value is added to the IPv4 address, and the following options are described correctly as ?

A.
RD can be used to control the publication of VPN routing information
A.
RD can be used to control the publication of VPN routing information
Answers
B.
On a PE device, each VPN instance corresponds to an RD value, and the RD value must be unique on the same PE device
B.
On a PE device, each VPN instance corresponds to an RD value, and the RD value must be unique on the same PE device
Answers
C.
RD is encapsulated in the Update message as an extended community attribute of BGP during delivery
C.
RD is encapsulated in the Update message as an extended community attribute of BGP during delivery
Answers
D.
After the PE receives an IPv4 route from CE, it adds an RD to the route to IPv4 that translates to a globally unique VPN-IPv4 route and publishes it on the public network
D.
After the PE receives an IPv4 route from CE, it adds an RD to the route to IPv4 that translates to a globally unique VPN-IPv4 route and publishes it on the public network
Answers
Suggested answer: B

Which of the following VPN technologies may have two IP message headers in one message?

A.
GOES
A.
GOES
Answers
B.
SSL VPN
B.
SSL VPN
Answers
C.
IPsec VPN
C.
IPsec VPN
Answers
D.
L2TP
D.
L2TP
Answers
Suggested answer: A, C, D

The following statement about the application of BFD is correct?

A.
The one-arm echo function refers to the detection of the connectivity of the forwarding link through the loopback operation of the BFD packet
A.
The one-arm echo function refers to the detection of the connectivity of the forwarding link through the loopback operation of the BFD packet
Answers
B.
BFD multi-hop detection means that BFD can detect arbitrary paths between two systems that may span many hops or overlap in some parts
B.
BFD multi-hop detection means that BFD can detect arbitrary paths between two systems that may span many hops or overlap in some parts
Answers
C.
BFD and OSPF linkage is to associate BFD and OSPF, and notify OSPF through BFD's rapid sensing of link failures, thereby speeding up OSPF Response to changes in network topology
C.
BFD and OSPF linkage is to associate BFD and OSPF, and notify OSPF through BFD's rapid sensing of link failures, thereby speeding up OSPF Response to changes in network topology
Answers
D.
BFD single-hop detection refers to the IP connectivity detection of two direct-connected systems
D.
BFD single-hop detection refers to the IP connectivity detection of two direct-connected systems
Answers
Suggested answer: A, B, C, D

BGP EVPN Type2 routes are used to pass IRB type routes with information including ?( Multi-select)

A.
Layer 2 VNI
A.
Layer 2 VNI
Answers
B.
Host IP address
B.
Host IP address
Answers
C.
Host MAC address
C.
Host MAC address
Answers
D.
Three layers of VNI
D.
Three layers of VNI
Answers
Suggested answer: A, B, C, D

Use ping-ax-cY-sZ-vpn-instance M 105162, which has the meaning of

A.
IcMP request for the ping, message size Z (without IP and ICMP headers)
A.
IcMP request for the ping, message size Z (without IP and ICMP headers)
Answers
B.
The source IP address of the ping packet is X
B.
The source IP address of the ping packet is X
Answers
C.
The ping belongs to the VPN instance M
C.
The ping belongs to the VPN instance M
Answers
D.
The ping sends Y ICMP requests
D.
The ping sends Y ICMP requests
Answers
Suggested answer: A, B, C, D
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