Regarding the BGP/MPLS IP VPN network architecture, what is the error described below?

sites can be accessed each other through vPNs, and a site can only belong to a VPN

P devices only need basic MPLS forwarding capabilities and do not maintain VPN-related information

BGP/MPLSIPVPN network architecture consists of CE (Customer Edge), PE (Provider Edge) and P (Provider), of which PE and P Is a carrier device, CE is BGP/MPLSIPVPN with Household equipment

Under normal circumstances, CE devices are not aware of the presence of VPN, and CE devices do not need to support MPLS MP-BGP, etc

RTA is the source DR router, RTB is the RP router, and the multicast source sends multicast data to the RTA, but the PIM is not visible on the RTB Register the multicast source to which the message is registered, then the possible causes are ?

Multicast network statically configures RP, while RTA router does not statically configure RP

The RP elected by RTA is not an RTB

RTB to RTA has no unicast routing, causing the RTB to fail RPF checks for the source

The multicast network dynamically elects the RP instead RTA failed RPF check for BSR

Multicast network statically configures RP, while RTA router does not statically configure RP

The RP elected by RTA is not an RTB

RTB to RTA has no unicast routing, causing the RTB to fail RPF checks for the source

The multicast network dynamically elects the RP instead RTA failed RPF check for BSR

Regarding the description of the permanent multicast address, the error is ?

All routers running the PIM protocol listen on 22400100

All hosts and routers in the network segment listen on 224001

All routers running the OSPF protocol listen to 224005

If all the public IP addresses are used by a company's intranet users to access the Internet using NAT's No-pat method, what will happen to subsequent intranet users who access the Internet?

Subsequent intranet users will not be able to access the Internet

automatically switch NAT to PAT after the Internet

Subsequent intranet users will not be able to access the Internet

Synchronize messages to other NAT conversion devices for NAT conversion

Squeeze out the previous user and force NAT conversion to go online

The correct statement about the VRRP protocol version is ?

VRRPv2 is only available for IPv4

VRRPv3 does not support authentication

VRRPv2 is only available for IPv4

VRRPv3 does not support authentication

VRRPv3 is only available for IPv6

The RSTP protocol provides a variety of protection functions, such as when the edge port is configured as a protection state, the edge port receives the BPDU packet processing method;

Directly discard the BPDU packet

After parsing the BPDU message, the relevant information is obtained

Forward BPDU packets as required

The role of Link-LSA in OSPFv3 does not include ?

Advertise to other routers on the link optional that is set in the Network LSA from which this link originates

Advertise the per-port ID of this router to other routers on the link

Advertise the link-local address

of this interface to other routers on the link Advertise this IPv6 prefix list to other routers on the link

Regarding BGP MED, which of the following descriptions is correct?

In the BGP routing rules, MED has a lower priority than AS Path, Praferred-value, Local-Preference, etc Origin

The default value for the B. BGP routing MED is 0

By default, if there is no MED value in the route attribute, it is processed by 0 If the bestroute med-none-as-maximum command is configured, MED is processed as the maximum 4294967295

In the BGP routing rules, MED has a lower priority than AS Path, Praferred-value, Local-Preference, etc Origin

The default value for the B. BGP routing MED is 0

By default, if there is no MED value in the route attribute, it is processed by 0 If the bestroute med-none-as-maximum command is configured, MED is processed as the maximum 4294967295

By default, BGP routing rules can MED comparison of routes from different autonomous systems

What does IPV6 enable topology ipv6 mean under IS-IS protocol view?

SPF calculation is performed separately in the topology of IPv4 and IPv6,

SPF calculation for IPv6 is not supported

SPF calculation is performed separately in the topology of IPv4 and IPv6,

IPv4, IPv6 using the same topology for SPF calculation

The value of OSPF and BFD linkage is ? Radio

Any change in BFD status is realized by detecting the BFD at the millisecond level, which correlates the OSPF state and realizes the purpose of OSPF rapid sensing link state

Does not affect OSPF neighbor status

BFD packet transmission interval can reach the 100-second level, which is slower than the OSPF induction link state

OSPF's hello send interval is seconds, which is faster than BFD inductive link state

A campus deployed both IPv4 and IPv6 networks for service testing, and ran IS-S to interconnect the networks. (The S-S routing protocol has good scalability and is widely used in the live network.)Regarding IS-IS extensibility, which of the following statements is true?

In order to support IPv6, IS-IS needs to add TLV to carry IPv6 address information

IS-IS uses the TLV structure to build messages, making lS-IS more flexible and extensible

For IS-IS, adding new features simply adds a new TLV to

In order to support IPv6, IS-IS needs to add TLV to carry IPv6 address information

IS-IS uses the TLV structure to build messages, making lS-IS more flexible and extensible

NLPID is a new type of TLV added by IS-IS to support IPv6

For IS-IS, adding new features simply adds a new TLV to

Regarding the domain-authentication-mode md5 hello command in the ISIS process, the correct explanation is ?

All router domain authentication methods of the same routing domain are MD5, the password is hello, and lS-IS SNP and LSP will spread normally.

ISIS authentication cannot be applied in IPv6 environments.

This command is mainly used to make is the ISIS Hello message carry authentication information during the transmission process.

All router domain authentication methods of the same routing domain are MD5, the password is hello, and lS-IS SNP and LSP will spread normally.

Which of the following configurations is the correct OSPFv3 route aggregation configuration:

[Huawei]ospfv3 1 [Huawei-ospfv3-1J]area 1[Huawel-ospfv3-1-area-0001]abr-summary fc00:0-0:48 cost 400

[Huawei]ospfv3 1 [Huawei-ospfv3-1]asbr-surmary fcO0-0:0::48 3 cost 20 tag 100

[Huawei]ospfv3 1 [Huawei-ospfv3-1J]area 1[Huawel-ospfv3-1-area-0001]abr-summary fc00:0-0:48 cost 400

[Huawei] interface gigabitethernet 1/0/0[Huawei-GigabitEthernet1/0/0]asbr-surmary fcO0-0:0:48 cost 20

[Huawei]ospfv3 1 [Huawei-ospfv3-1]asbr-surmary fcO0-0:0::48 3 cost 20 tag 100

[Huawei]ospfv3 1 [Huawei-ospfv3-1]abr-surmary fcO0:0:0:48 cost 400

(Huaweijospf3 1 Huawei-ospfv3-1Jarea 1Huawei-ospfv3-1-area-0001]asbr-sumary fcO0:0:0: 48 cost 20 tag 100

If we have a VPN instance configured on a router, if we need to view the VPN route on a Huawei router, which of the following commands should we use?

display ip routing-table vpn-instance vpn-instance-name

Is the following statement about VLAN aggregation correct?

Sub-VLAN is used to isolate broadcast domains

A Super VLAN can contain one or more Sub-VLANs

Sub-VLAN is used to isolate broadcast domains

A Super VLAN can contain one or more Sub-VLANs

The super Sub-VLAN contains a physical interface that can establish a Layer 3 VLANIF interface

Sub-VLAN contains a physical interface that can establish a Layer 3 VLANIF interface

Regarding the characteristics of CE double attribution, the description is wrong with ?

VRFs of two PEs connected to the same CE can belong to different VPNs.

CE accesses the backbone through two links that can be used as both load sharing and primary and standby links.

CE and PE form a CE dual-home network, which can ensure high network availability.

VRFs of two PEs connected to the same CE can belong to different VPNs.

In the CE dual home network, it is possible to generate loops, and you can use route-tag to solve the loop problem.

There is a new HW office that needs to use their router as a DHCP server. When configuring the DHCP server to provide DHCP services to the current office, what of the following items need to be configured?

Exclude unused IP addresses from the DHCP server

Configure the timeout period for ping packets

Configure the startup file for the DHCP server

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, 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.

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.

Regarding the MPLS basic forwarding process, the following description is incorrect? Radio

When the P message enters the MPLS domain, check whether the Tunel lD value corresponding to the destination IP address is Ox0O If the Tunel IlD value is Ox0 Then enter the MPLS forwarding process.

By default, the PHP-enabled Erass node assigns a label value of 3 to the inverted second-hop node.

When an IP message enters the MPLS domain, the MPLS boundary device inserts a new label between the layer 2 header and the IP header.

When the P message enters the MPLS domain, check whether the Tunel lD value corresponding to the destination IP address is Ox0O If the Tunel IlD value is Ox0 Then enter the MPLS forwarding process.

The transport node device replaces the existing top-of-stack label (outermost label) with the label assigned by the next hop device.

In EPIM-SM, the following description of the PIM Join message is correct?

The PIM Join message is sent every 60 seconds to refresh the status of the upstream router mroute for the multicast tree

APIM Join messages are sent every 3 minutes, and status

PIM Join messages for the multicast tree are only sent when the multicast tree is first established

The PIM Join message is sent every 60 seconds to refresh the status of the upstream router mroute for the multicast tree

The upstream router sends a PIM Join acknowledgment in response to each PIM Join message received from the downstream router

Four routers R1, R2, R3, and R4 run IS, and the I5S router type is noted in the diagram. All four routers have an area address of 49001, and looking at the routing table on R1l shows the following results, the reason why R did not reach the route of 1034344

R and R4 Zone Planning Errors The System-ID of

The routing policy configured on the ARO filters the System-ID of the default route

R and R4 Zone Planning Errors The System-ID of

A router Router LSA is shown in the figure, and the error in the following statement is ?

This router supports external routing ingestion

The Router ID of this router is 100121

This router has established an adjacency relationship

The correct statement about the difference between OSPFv2 and OSPFv3 is ? Multi-select

OSPFv3 is similar to OSPFv2 in that it uses a multicast address as the OSPF message destination address

The same type of message exists in OSPFv2, OSPFv3: Hello, DD, LSR, LSU, LSAack, Their message format is the same

OSPFv2 has the protocol number 89 in the IPv4 packet header, OSPFv 3 The next number in the IPv6 message header is 89

BOTH OSPFv2 and OSPFv3 support interface authentication. And OSPFv3 authentication is still based on the fields in the ospf message header

OSPFv3 is similar to OSPFv2 in that it uses a multicast address as the OSPF message destination address

The same type of message exists in OSPFv2, OSPFv3: Hello, DD, LSR, LSU, LSAack, Their message format is the same

OSPFv2 has the protocol number 89 in the IPv4 packet header, OSPFv 3 The next number in the IPv6 message header is 89

Regarding the Stub region and the NSSA region of the OSPF protocol , the following statement is incorrect with a single choice

Type5 LSA injection is not allowed in the Stub region, while Type5LSA injection is allowed in the NSSA region

Neither the Stub region nor the NSSA region allows injection of Type4 LSA

Type5 LSA injection is not allowed in the Stub region, while Type5LSA injection is allowed in the NSSA region

Type7LSA injection is not allowed in the Stub region, while Type7LSA injection is allowed in the NSSA region

Both the Stub region and the NSSA region allow injection of Type3 LSA

As shown in the figure, SWA, SWB runs the PSTP protocol, and Cost of Path remains the default without modification, so the following statement is correct

GE0/0/2 on SWB is Alternative port

GEO/0/1 on ASWB is Alternative port

GE0/0/2 on SWB is Alternative port

SWB will become the root bridge

Which of the following is the benefit of VLAN aggregation?

Implements isolation of broadcast domains between Sub-VLANs

Reduce the waste of IP addresses

Increased flexibility in addressing

Implements isolation of broadcast domains between Sub-VLANs

Reduce the waste of IP addresses

Increased number of available VLANs

Increased flexibility in addressing

The correct description about the prefix list is:

The prefix list is used to filter P prefixes and can match both prefix numbers and prefix lengths

The prefix list cannot be used for packet filtering

The prefix list is used to filter P prefixes and can match both prefix numbers and prefix lengths

The prefix list is used to filter IP prefixes, and cannot match both the prefix number and the prefix length

The prefix list cannot be used for packet filtering

The prefix list can be used to filter packets

There can be multiple nodes under a route -policy, different node numbers are identified by nodes, and each node can have multiple if-match and apply clauses, which of the following descriptions are wrong ?

The relationship between different nodes is an "and" relationship

The relationship between the if-match clauses under each node is "or"

The relationship between the if-match clauses under each node is "and"

The relationship between different nodes is an "and" relationship

There is an "or" relationship between different nodes

The relationship between the if-match clauses under each node is "or"

Huawei H12-891 Practice Test 8 - Free Online Exam Prep & Questions

Regarding BGP/MPLS IP VPN routing interactions, the following description is incorrect?

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