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Huawei H12-891 Practice Test - Questions Answers, Page 19

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Regarding the certification of the ISIS protocol, there is a correct statement
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 default configured switch has an empty MAC address table at this time , and Host A connected to the switch issues the first unicast data frame, so what will the switch do after receiving the teaching system?( Single choice questions).
If the PIM-SM protocol is running in a multicast network , you need to configure RP, and the configuration equation of RP is divided into dynamic RP and static RP. The following configuration description of the RP is correct (radio).
The switch SWA and SWB are connected together by 2 Ethernet links, where the switch SWA has the following interface configuration:
The Option field in OSPFv3 appears in all LSAs
In Huawei devices, when SIS introduces external routes and sets external route tags for route information, the Metric type of ISIS does not need to be modified and remains default.
What of the following actions can enable fast failure detection on multicast networks?
As shown in the figure, which of the following options satisfies two routers to establish an ISIS neighbor?( Single choice questions).
In the use of the CP protocol, the following description is correct?

Question 181

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Run the SSM across the entire HW IP multicast network. The following about SSM understands correctly?( Multiple choice question)

A.
No RP is required
A.
No RP is required
Answers
B.
SSM uses only shared trees
B.
SSM uses only shared trees
Answers
C.
SSM uses only the SPT tree
C.
SSM uses only the SPT tree
Answers
D.
Ideal for 1-to-many applications
D.
Ideal for 1-to-many applications
Answers
E.
SSM is recommended when you have multiple sources and expect to minimize the state of mroute in your network Ideal for many-to-many applications
E.
SSM is recommended when you have multiple sources and expect to minimize the state of mroute in your network Ideal for many-to-many applications
Answers
Suggested answer: A, C, D

Question 182

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

A.
True
A.
True
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B.
False
B.
False
Answers
Suggested answer: B

Question 183

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The following statement about IPSG technology is correct (single choice).

A.
The ip source checkuser-bind check-item command is used to configure VLAN- or interface-based IP packet checks, which take effect for both dynamic and static table entries.
A.
The ip source checkuser-bind check-item command is used to configure VLAN- or interface-based IP packet checks, which take effect for both dynamic and static table entries.
Answers
B.
If an interface is configured as the OKCP Scooing Tust interface, the interface can normally receive DHCP ACK and DHCPNAK responded to by the OHHNP server and DHCPOffer packets, other untrusted ports cannot receive these packets properly.
B.
If an interface is configured as the OKCP Scooing Tust interface, the interface can normally receive DHCP ACK and DHCPNAK responded to by the OHHNP server and DHCPOffer packets, other untrusted ports cannot receive these packets properly.
Answers
C.
On Huawei routers, ipSG functions can be configured in Vlanif.
C.
On Huawei routers, ipSG functions can be configured in Vlanif.
Answers
D.
The IPSG can perform binding table match checks on IP packets entering and leaving the interface.
D.
The IPSG can perform binding table match checks on IP packets entering and leaving the interface.
Answers
Suggested answer: B

Question 184

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Underneath, what doesn't belong to EVPN Type2 routing is ?( Multiple choice question)

A.
Host ARP advertisement
A.
Host ARP advertisement
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B.
BUM message forwarding
B.
BUM message forwarding
Answers
C.
Host MAC address advertisement
C.
Host MAC address advertisement
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D.
Host IP Route Advertisement
D.
Host IP Route Advertisement
Answers
Suggested answer: B

Question 185

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The following description of the PPPoE data frame is correct?( Multiple choice questions).

A.
Once a PPPoE session is established, all Ethernet packets are unicast
A.
Once a PPPoE session is established, all Ethernet packets are unicast
Answers
B.
The Ethernet_Type domain is fixed to Ox8863
B.
The Ethernet_Type domain is fixed to Ox8863
Answers
C.
When PPPoE passes session data, Code must be set to Ox0
C.
When PPPoE passes session data, Code must be set to Ox0
Answers
D.
The Session_ID of the PPP session is not allowed to change and must be the specified in the Discovery phase
D.
The Session_ID of the PPP session is not allowed to change and must be the specified in the Discovery phase
Answers
Suggested answer: C, D

Question 186

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Regarding BGP route filtering, the following description is wrong?

A.
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
A.
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
Answers
B.
For routes published locally, configure a routing policy that takes effect before the route is added to the BGP route table.
B.
For routes published locally, configure a routing policy that takes effect before the route is added to the BGP route table.
Answers
C.
In the same node of Route-Policy, multiple if-match clauses for different attributes are "or" relationships.
C.
In the same node of Route-Policy, multiple if-match clauses for different attributes are "or" relationships.
Answers
D.
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.
D.
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.
Answers
Suggested answer: C

Question 187

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Regarding route introduction, the following description is correctly ?( Multiple choice questions).

A.
OSPF introduces two types of external routes, with the first type of external route taking precedence over the second type of external route.
A.
OSPF introduces two types of external routes, with the first type of external route taking precedence over the second type of external route.
Answers
B.
Use the default-route imported command in BGP only to introduce default routes that already exist in the local IP routing table.
B.
Use the default-route imported command in BGP only to introduce default routes that already exist in the local IP routing table.
Answers
C.
When ISIS introduces an external route, if you do not specify the route type that is introduced, the Level-1 route is introduced by default on the L1/2 router
C.
When ISIS introduces an external route, if you do not specify the route type that is introduced, the Level-1 route is introduced by default on the L1/2 router
Answers
D.
When ISIS introduces an external route, if you do not specify the type of route that is introduced, the Leve1-1 route is introduced by default on the L1 router .
D.
When ISIS introduces an external route, if you do not specify the type of route that is introduced, the Leve1-1 route is introduced by default on the L1 router .
Answers
Suggested answer: A, B

Question 188

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Two routers connected through a firewall cannot establish a BGP neighbor relationship. What causes it?

A.
EBGP Multi-hop is not configured
A.
EBGP Multi-hop is not configured
Answers
B.
The firewall did not release IP protocol number 89
B.
The firewall did not release IP protocol number 89
Answers
C.
Firewalls that do not have an open UDP port number of 179
C.
Firewalls that do not have an open UDP port number of 179
Answers
D.
BGP neighbors must form a Layer 2 adjacency
D.
BGP neighbors must form a Layer 2 adjacency
Answers
Suggested answer: C

Question 189

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When a Layer 3 switch sends IP packets originating from one VLAN to another LAN, which field in the following options is overridden?( Single choice questions).

A.
Three layers of TTL
A.
Three layers of TTL
Answers
B.
Layer 3 destination address
B.
Layer 3 destination address
Answers
C.
Layer 3 source address
C.
Layer 3 source address
Answers
D.
Layer 3 Transport Protocol
D.
Layer 3 Transport Protocol
Answers
E.
Two-tier TTL
E.
Two-tier TTL
Answers
Suggested answer: A

Question 190

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The following statement about the NSSA area is correct (multiple choice).

A.
In the NSSA area where the OSPF neighbor sends hello packets, the N position 0, E within the option field Position 1
A.
In the NSSA area where the OSPF neighbor sends hello packets, the N position 0, E within the option field Position 1
Answers
B.
The NSSA zone must automatically generate a default LSA to access the external network
B.
The NSSA zone must automatically generate a default LSA to access the external network
Answers
C.
The NSSA zone generates a Category VII LSA to advertise external routing, and the FA address in the Category VII LSA acts to prevent loops
C.
The NSSA zone generates a Category VII LSA to advertise external routing, and the FA address in the Category VII LSA acts to prevent loops
Answers
D.
In the OSPF neighbor in the NSSA region sends hello packets, position 1 within the option field , position E
D.
In the OSPF neighbor in the NSSA region sends hello packets, position 1 within the option field , position E
Answers
Suggested answer: D
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