Off-stem cross-domain VPN-Option B scenario, the following description is incorrect?

The outer layer tag is exchanged between two ASBRs to vpnV4 routes.

During the packet forwarding process, it is necessary to exchange the VPN's private network LSP on the

two ASBRs IP-EBGP neighbor relationships.

The cross-domain VPN-Option B scheme is not limited by the number of interconnection links between ASBRs

The outer layer tag is exchanged between two ASBRs to vpnV4 routes.

Huawei's two switch SWA, SWB is connected together through 7 Ethernets, and static route aggregation is configured, and the corresponding ports on the switch SWA are E1/0/1, E1/02, E1/0/3, E1/0/4, E1/ 0/5, E1/0/6, E1/0/7, configured sequentially as if switch SWA, SWB Each aggregation group supports only 6 ports.

With the same configuration across ports, the Ethemet 1/0/7 port is the aggregate group Unselected port

With the same configuration of each port, the Ethemet 1/0/6 port is the aggregate group Unselected port

With the same configuration of each port, SWA randomly selects one of the 7 ports as the aggregate group Unselected port

With the same configuration of each port, the Ethemet1/0/1 port is the aggregation group Unselected port

What command can be used to prevent users from accessing multiple devices through the HUB on the switch's access port?( Radio).

Huawei interface GigabiEthemetO/0/1Huawei-GigabiEthemetO/OJport link-type acces Huawei GigabilEthemet/0/1port-secunty enable0

[Huawe interface Gigabithemeto/0/1[Huawei-GigabiEthermeto/O/lport linktypetrunk [Huawel- GigabithemetO/1]port trunk allow pass vlan 10

[Huawei interface GigabiEthemet/0/1[Huawe-GigablEthemetO/0/1Jpor ink type acess(Huawei GigabitEthemet/O/Tipsg enable

Huawei interface GigabiEthemetO/0/1Huawei-GigabiEthemetO/OJport link-type acces Huawei GigabilEthemet/0/1port-secunty enable0

[Huawei iterface Gigabithemeto/0/1 (Huawei-GigabitEthemeto//1)pot ink type access(Huawel-CigabiEthemeto/1]portisolate enable

Router RL runs the OSPF protocol and uses the display ip routing-tabe command to view the router RL's routing table , the following information about OSPF in the routing table is described correctly as ?

In the routing table, Route table entries identified with the "O_ASE identifier can only be learned through routing introduction

In the routing table, the routing table entries identified by the OSPF identifier can only be learned through the 3 types of LSAs to

In the routing table, used The 'OSPF' identifier identifies a route table entry that can only pass a Type 1 LSA

In the routing table, the routing table entries identified with the 'OSPF identifier' can be learned through the 1/2/3/5 LSA to

In the routing table, Route table entries identified with the "O_ASE identifier can only be learned through routing introduction

Regarding the BGP ring protection mechanism, the following description is correct?

A AS_PATH attribute is used between autonomous systems to prevent ring cats.

Routes learned from IBGP are not advertised to IBGP neighbors and are used to prevent routing loops inside the AS

You can use the AS_CONFED_SET attribute to prevent loops within a consortium:

A AS_PATH attribute is used between autonomous systems to prevent ring cats.

The Cluster List property is used for reflector cluster inner ring defense, and the router finds that the Cluster List of route entries contains its own Client lD The route is rejected

Routes learned from IBGP are not advertised to IBGP neighbors and are used to prevent routing loops inside the AS

You can use the AS_CONFED_SET attribute to prevent loops within a consortium:

Regarding route Policy, the following description is correct as ?( Multiple selection) Multiple selection

The table entry exceed::0 less-equal 128 indicates that all IPv6 routes are allowed through

If more than one node is defined in Route-policy, at least one node in each node should have a matching pattern of permit

Route-Policy can filter only the default route

Advanced ACLs can be applied in route-policy to filter routes

The table entry exceed::0 less-equal 128 indicates that all IPv6 routes are allowed through

If more than one node is defined in Route-policy, at least one node in each node should have a matching pattern of permit

Route-Policy can filter only the default route

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

R there is a route to R2 loopback0 10022/32

No neighbor relationship can be established between R1 and R2

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 10022/32

No neighbor relationship can be established between R1 and R2

The following is the correct description of the aggregation of BGP (radio).

Routes in the BGP local route table can be manually aggregated.

After you configure the Aggregate ipv4-address mask, only aggregate routes are published, not detail routes.

For IPv6 routing, BGP supports manual aggregation and automatic aggregation.

BGP enables automatic aggregation by default.

Routes in the BGP local route table can be manually aggregated.

The following about BGP routing, describing the error, is ?

non-aggregate routes take precedence over aggregate routes

In PrefVal, Local_ Preference is equal to the case if the route is generated locally, IBGP Routing, the BGP preference for EBGP routing, is generated effectively referring to route priority.

See the following entry in the BGP routing table:* 172161.11/32 000010 0? Indicates that the route is available non-optimal

For next_hop unreachable routes when invalid routes, do not participate in the preferred.

The following description of Filter-Policy is correct?( Radio).

Filter-policy filters the link state information received or published, and can modify the properties of route entries.

With Filter-Policy, on ASBR in OSPF, type5LSA and type7LSA can be applied The build is filtered.

Prefix lists can be used to filter both routes and packets.

Filter-policy filters the link state information received or published, and can modify the properties of route entries.

When filtering routes using the pre-slow list, the table entry ip-prefxldeny0000 0 lese-qual 32 indicates that only the default route matches

Deploying the ISIS protocol in an IPv6 environment is true in the following statement (radio).

In the same broadcast network. If each router supports both IPV4 and Pv6, the DISC of JPV4 and Pv6 must be the same device

By default, the DIS priority of broadcast network interfaces at Level-1 and Level-2 is 1

In broadcast networks, the DIS priority for IPV4 and IPV6 can be set separately

In the same broadcast network. If each router supports both IPV4 and Pv6, the DISC of JPV4 and Pv6 must be the same device

IS-IS sient is configured under the finger port, this interface will not send ISIS packets, but will receive ISIS packet

As shown in the figure, in the HUB & Spoke networking mode of MPLS BGPVPN, in order to achieve the division can only communicate with the headquarters, the division can not communicate with each other When setting up RT, which of the following scenarios is this?( Radio).

Headquarters: importTarget: 12:3EpodTarget: 3:12

:import Target:12:3EpodTarget:12:3

Headquarters: importTarget:1:1EpodTarget:3:3

Headquarters: Impot Target:2:2; Expor Target:3:3

Headquarters: importTarget: 12:3EpodTarget: 3:12

The following statement about IPSec VPN is correct

The two routers establish IPSecVPN in main mode, and from the 5th message (included), the payload's data is often encrypted.

The two routers can establish an OSPF neighbor relationship through the IPSec VPN (19) channel and exchange intranet devices by

Brutal mode can support NAT traversal, while main mode does not support NAT traversal.

The two routers establish IPSecVPN in main mode, and from the 5th message (included), the payload's data is often encrypted.

Two routers establish an IPSec VPN in brutal mode, so that the tunnel is built with a minimum of 4 messages interacting between the two devices.

The two routers can establish an OSPF neighbor relationship through the IPSec VPN (19) channel and exchange intranet devices by

For Layer 2 VPN technology, the following statement is correct? Multi-select

The VPLS configuration is complex and the Layer 2 network transmits BUM packets.

BGPEVPN supports features such as tenant isolation, Multi-homing, and broadcast suppression. D.BGPEVPN addresses mac address drift and multi-tenancy that VPLS cannot support.

VPLS is a widely used technology in the live network, which can provide transparent transmission of three-layer messages and achieve multi-point access.

The VPLS configuration is complex and the Layer 2 network transmits BUM packets.

BGPEVPN supports features such as tenant isolation, Multi-homing, and broadcast suppression. D.BGPEVPN addresses mac address drift and multi-tenancy that VPLS cannot support.

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

In a network, the same gigabit running S and OSPF anti-tampering and fluttering as shown in the figure, on the two border routers RTB and RTC are introduced into the wine route, the device question is to use gigabit one port strobe, , 222 The network is introduced into the OSE via impotrote direct on the RTD, assuming that all other configurations are dead default configurations, then the description of this network is wrong ?

On the RTC, the following configuration is adopted, only the routes of the 2222/32 cinder segment can be filtered out when routing is introduced, IRTClip ip-prefix 10 index 1 deny2000 8 lessequal 32

Adjusting the ISIS priority to 160 on the RTB avoids suboptimal routing problems in the network.

On the RTC, the following configuration is adopted, only the routes of the 2222/32 cinder segment can be filtered out when routing is introduced, IRTClip ip-prefix 10 index 1 deny2000 8 lessequal 32

RTB learns that the routing next hop for the 2222/32 network segment is RTA

The following configuration can filter out the routes of the 2222/32 CIDR block of the white RTD when RTC introduces OSPF routes.

Is the following description of the OSPFv3 message correct?

The interface ID of the sending interface must be included in the A Hello packet

The LSACK message contains LSA header information to confirm the receipt of LSU packets

Hello messages and the Option field for DD messages extends to 24-bit

The interface ID of the sending interface must be included in the A Hello packet

The LSACK message contains LSA header information to confirm the receipt of LSU packets

The LSR message contains the complete LSA header information for requesting an update to the LSA

Hello messages and the Option field for DD messages extends to 24-bit

As shown in the figure, all routers declare the loopback address in OSPF where the R storage does not return address is 1022 [2 declares 10033[ at the Ael.R3 ring E port[ 92101102A External routing in order to win light R win L away from the negative cut. The noodle command is as follows: (multi-select) [BIppprefixt permlt 1001.1.024 [R1] ospf1

router RI of the IP routing table, there is no external route to 1001.1.0/24 of

In the IP routing table of Router R1, there is no loopback route to

In the IP routing table of Router R1, there is no loopback route to R3

router RI of the IP routing table, there is no external route to 1001.1.0/24 of

router R1 In the IP route table, there is an external route to 1001.1.0/24

In the IP routing table of Router R1, there is no loopback route to

In the IP routing table of Router R1, there is no loopback route to R3

The following description is correct regarding route control

AS-path-fiter is for AS-path, which affects the routing of paths.

OSPF, ISIS, and BGP can issue default routes.

In Node 10, if-match community-fiter1 and f-match as-pah-fiter1 are "and the relationship

IBGP routes can be introduced using the impot-route BGP command

AS-path-fiter is for AS-path, which affects the routing of paths.

OSPF, ISIS, and BGP can issue default routes.

In Node 10, if-match community-fiter1 and f-match as-pah-fiter1 are "and the relationship

The following statement about VXLAN gateways is incorrect

Layer 2 gateway and VPN instance binding.

Layer 2 gateway: Used to solve the problem of tenant access to the VXLAN virtual network, it can also be used for subnet communication of the same VXLAN virtual network.

Layer 3 gateway: Used for cross-subnet communication of VXLAN virtual networks and access to external networks.

VXLAN Layer 3 gateways can be divided into centralized gateways and distributed gateways.

Layer 2 gateway and VPN instance binding.

The following description of the attributes of BGP is correct? Radio

When a BGP Speaker publishes a route learned from an EBCP peer to an IBGP peer, it does not change the next hop attribute of that routing information.

The AS number of the adjacent AS, ranked to the far right of the list of AS_Path in the BGP route entry.

When a BGP Speaker publishes a route learned from an EBCP peer to an IBGP peer, it does not change the next hop attribute of that routing information.

Local_Pref is valid only between EBGP peers and is not advertised to third-party AS

A route can have only one community attribute value.

Regarding the BGP alliance, the following description is wrong? Radio

The subas number of the federation, which by default is advertised to the BGP peer outside the federation

The consortium divides an AS into sub-AS, and the alliance external AS still considers the consortium to be an AS

Subsystems within a consortium can use private AS numbers. Huawei NE/AR routers, a consortium can be configured with up to 32 subsystems.

Consortium can easily detect the routing loop within the AS because EBGP is running between the subAS

The subas number of the federation, which by default is advertised to the BGP peer outside the federation

In order to reduce the number of OSPF routes in certain areas, the OSPf protocol has developed special area functions, and the following description of the characteristics of OSPF special areas is correct

Zone can be equipped with zhiyi

ASBR-Sunmary-LSA is allowed to be published to the NSSA region

AS-External-LSA is allowed to be published to the Stub region

Any OSPF zone can be configured as a special zone

Zone can be equipped with zhiyi

When the ACL in the VRP has multiple matching rules (rules), the matching order is about Which of the following statements is true?( Confirmed).

By default, rule-ID is followed Match from small to large

By default, matching is based on the principle of "depth first"

By default: Match in the order in which the perfect is matched first, then deny is matched.

By default, rule-ID is followed Match from small to large

There is only one matching order and cannot be modified

Regarding how the device handles messages in the MPLS network model, what is the following description of the error?

The label forwarding path LSP is determined and established by various protocols during the forwarding of messages. There is certainly no stripping of the label

For IP packets entering the MPLS domain, the device discards them.

The topology diagram and configuration are as follows, and now we hope that there is no buttoned route entry of 10033/32 in the Rl route table

Configure route summarization on R3 to summarize the routes to 10000/16

Configure filter-pollcy on top of R1 with 10033/32 via ACLL. Also applied in the Import direction

Configure route summarization on R3 to summarize the routes to 10000/16

Configure route rollup on R2 to summarize the route as 10000/16

Configure filter-pollcy on top of R1 with 10033/32 via ACLL. Also applied in the Import direction

Configure flter-policy on the above, match 10033/32 through ACL, and apply the answer in the expo direction

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

This router has established an adjacency relationship

This router supports external route ingestion

The Router ID of this router is 100121

Huawei H12-891 Practice Test 11 - Free Online Exam Prep & Questions

In an MPLS BGPVPN environment, if tags are distributed only through BGP and LDP, the MPLS tags of the message can be up to two layers of tags

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