The following statement about the VXLAN gateway is incorrect?( Single choice questions).

Layer 2 gateway and VPN instance binding.

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

Layer 3 gateway: Used for cross-subnet communication of the VXLAN virtual network 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 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).

The switch records the source MAC address of the data frame and floods the data frame

The switch will drop the data frame

The switch records the source MAC address of the data frame and floods the data frame

The switch will forward data to interface

based on the mesh MAC address of the data frame The switch caches the data frame and waits for the destination host to send the effect frame before forwarding it

The following description of 8021S deployment characteristics is correct?( Multiple choice question)

Multiple VLANs share a spanning tree instance

All VLANs share a spanning tree instance

Multiple bridges share a spanning tree instance

Each VLAN has one spanning tree instance

Multiple VLANs share a spanning tree instance

The following description of the attributes of BGP is correct?( Single choice questions).

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

The AS deficit of the adjacent AS is ranked at the far right of the list of AS_Path in the BGP route entry.

When the B. BGP Speaker publishes a route learned from an EBGP 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.

The following statement about the alliance is correct?( Single choice questions).

The subas number of the consortium, which by default notifies BGP peers outside the consortium

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 consortium, which by default notifies BGP peers outside the consortium

The following about the Router-LSA of OSPFv3 is correct?( Single choice questions).

The router-LSA data area contains the Interface ID of the neighbor on this side

The router-LSA data area contains the Link-Local address

The router-LSA data area contains the Interface ID of the neighbor on this side

Similar to OSPFv2, the Option field exists in the header of LSA, not in the data area of Router-LSA

When LS type= Ox0001 in the head of LSA, the data area representing LSA is Router-LSA

When judging the old and new LSA, the serial number parameter and the age parameter are used , and the following two parameters are correct for ?( Multiple choice questions).

When the router receives two LSAs, where the sequence number is the same and the checksum is the same, the smaller the age, the better

When the router receivesóThe age of the LSA is set to 3600S, the LSA is unavailable

If the serial number of the LSA reaches the end value of Ox7FFFFFFF, the current router advertises an LSA with an age of 3600S

Both the serial number and age parameters can determine whether the LSA is old or new, and the router prioritizes the sequence to participate in the teaching, and the larger the better

?? ipIp- prefoi p prefierame lndeindeoxrunmber)( pemit demy)ip+4adrssmasklengh gratrequa gratercqual abel]lescqualesequl ole) for ï Pprefofiier?If a pre-list of tooequal has been specified, but the greater-equal has not been specified, then how much of the prefix's range is sufficient?(). Radio neck).

[mask-length, less-equal-value]

The following description of MP-BGP is incorrect?( Single choice questions).

MP_REACH_NLRI and MP_UNREACIH_NLRI are optional transition properties.

The MP_UNREACH_NLRl of the update message, excluding the path nationality.

MP-BGP can be used to assign tags.

MP_REACH_NLRI and MP_UNREACIH_NLRI are optional transition properties.

A complete MP_REACH_NLRI attribute structure contains address family, next hop, and prefix information.

The following description of the BGP route reflector is ?( Multiple choice questions).

The route learned from the client, all non-clients and clients published to this RR.

A network of bones is divided into multiple reflection clusters, each of which configures the other RRs as non-clients, and establishes an IBGP full connection between the RRs.

Cluster_List is an optional non-staging property for ring protection within the cluster.

The route learned from the client, all non-clients and clients published to this RR.

A network of bones is divided into multiple reflection clusters, each of which configures the other RRs as non-clients, and establishes an IBGP full connection between the RRs.

The Originator_ID attribute is generated by the Route Reflector (RR) for inter-cluster ring protection.

The router connects two EBGP neighbors through two parallel Serial cables, what do you do to achieve bidirectional negative sharing between two EBGP neighbors connected by these two parallel Serial cables? ( Single choice questions).

Use the Loopback interface to establish an EBGP neighbor relationship, configure EBGP Muti-hop, configure the Loopback interface as the update source, and then use IGP to implement Equivalent path load sharing between Loopback addresses

Without any method, BGP automatically implements load sharing of traffic across different autonomous systems on the available links

Use the Loopback interface to establish an EBGP neighbor relationship, configure EBGP Muti-hop, configure the Loopback interface as the update source, and then use IGP to implement Equivalent path load sharing between Loopback addresses

Configure the EBGP neighbor relationship with the Loopback interface as the update source, and the IGP in each AS needs to introduce two equivalent paths to the loopback address of the EBGP neighbor; And you need to use the command "next-hop?local"

Use the command "ebgp-load-balance" at both ends

To configure an EBGP neighbor relationship with the Loopback interface as the update source, the IGP in each AS needs to introduce two equivalent paths to the EBGP neighbor loopback address ; And the commands "ebgp maxhop" and "next-hop-local" are used

IPv6 introduces the Solicited-Node address, which is described correctly below (multiple choice)

The Solicited-Node address on the router interface is automatically generated and can have multiple.

This is a specific address that is used for resolution in ARPv6 The MAC address.

The Solicited-Node address on the router interface is automatically generated and can have multiple.

If the Solicited-Node address is not configured , the router automatically generates one on each interface.

IPv6 introduced the Solicited-Node address to support IPv6 multicast.

NXLAN under different VPNs need to be accessed, one of the subnets is as follows, EVPN under RT 10: 10 both, RT 1000: 1000 export, VPN RT 100: 100 The other subnet can be configured as ?

Vpn configure 1000:1000 both evpn

Configure 1000:1000 export under EVPN

Configure 10:10 both under VPN.

The following description of the CHAP authentication function in the PPP protocol is correct?( Multiple choice questions).

The user name must be configured under the authenticated party interface for CHAP authentication

can also be configured without the authenticated party interface Using the authentication sequence ID, random number, and key, a Hash value

is calculated using the MD5 algorithm Three message interactions are required for authentication, and only the user name is transmitted on the network without the password

The user name must be configured under the authenticated party interface for CHAP authentication

If the authenticator does not have a username configured, password

can also be configured without the authenticated party interface Using the authentication sequence ID, random number, and key, a Hash value

is calculated using the MD5 algorithm Three message interactions are required for authentication, and only the user name is transmitted on the network without the password

The following message about OSPFV3 is correct?

The Option field of the Hello and DD packets extends to 24-bit

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

The Hello message must contain the interface ID of the sending interface

The Option field of the Hello and DD packets extends to 24-bit

LSR packets containing the full LSA header information for requesting an update to the LSA

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

The Hello message must contain the interface ID of the sending interface

When configuring ISIS zone authentication, which ISIS message will carry the authentication letter? ( Single choice questions).

Hello message of ISIS's Level-1.

Hello message of ISIS's Level-2

ISIS elects DIS in broadcast multiplexed access networks, and the following statement about DIS is correct?( Multiple choice)

ISIS elects dis by comparing priorities, and mac addresses if the priorities are consistent

In a broadcast multiple access network, DIS sends Hello PDUs at three times the frequency

DIS guarantees database synchronization by periodically sending CSNP messages

ISIS elects dis by comparing priorities, and mac addresses if the priorities are consistent

In a broadcast multiple access network, DIS sends Hello PDUs at three times the frequency

DIS guarantees database synchronization by periodically sending CSNP messages

DIS supports preemption function, after the new DIS preemption is successful, there is no need to flood any LSP packet

The following is an error in the OSPF routing calculation (single choice).

Compared to the PRC algorithm, the ISPF algorithm only calculates the changed leaf nodes when the route changes PRC algorithm to recalculate routes

When the first and second class LSAs on the network change, OSPF uses the ISPF algorithm to recalculate the routes The

OSPF router uses the FULL SPF algorithm to calculate all nodes in the network when initially calculating routes

The correct description about the BGP reflector is ?( Multiple choice questions).

IBGP neighbor relationships need to be fully interconnected without a route reflector. The introduction of route reflectors can reduce the need for full interconnection

The route reflector can advertise routes learned from non-clients to all clients

The route reflector can advertise routes learned from one client to other clients and non-clients

IBGP neighbor relationships need to be fully interconnected without a route reflector. The introduction of route reflectors can reduce the need for full interconnection

The route reflector can advertise routes learned from non-clients to all clients

The route reflector can advertise routes learned from one client to other clients and non-clients

The route reflector can advertise routes learned from IBGP neighbors to all clients and non-client

A router receives a BGP route with the community attribute NO-Export , how will the router handle the BGP route?

Advertise only to IBGP neighbors.

No more advertising to other BGP routers.

Advertise only to IBGP neighbors.

The route is advertised normally, but the route is not used to forward data.

The HW appliance network administrator plans to migrate IGMPv2 in the multicast network to IGMPV3 Where does IGMPV3 improve over IGMPv2?

IGMPv3 adds the ability for hosts to specify multicast groups that do not join a specific multicast source

IGMPv3 adds the ability for hosts to specify multicast groups that are joined to a specific multicast source

IGMPv3 removes the Report-suppression feature for membership reporting

IGMPv3 adds the ability for hosts to specify multicast groups that do not join a specific multicast source

IGMPv3 adds the ability for hosts to specify multicast groups that are joined to a specific multicast source

IGMPv3 adds Request-to-send and Clear-to-send between source and local IGMP queries

IGMPv3 removes the Report-suppression feature for membership reporting

IGMPv3 removes the ability to include all sources in a wildcard group

What does RT do in MPLS VPN? Multiple choice questions).

Allows the peer PE to decide which VPNv4 routes to import into a particular VRF

Allows peer PE to decide which VPNv4 routes not to import into a particular VRF

Allows the peer PE to decide which VPNv4 routes to import into a particular VRF

Allows peer PE to decide which VPNv4 routes not to import into a particular VRF

Allows the peer CE to decide which VPNv4 routes to import into a particular VRF

Allows the peer CE to decide which VPNv4 routes not to import into a particular VRF

The following description of the process of sending and receiving data frames in switch interface Access mode is correct? ( Single choice questions).

Access mode strips off the VLAN tag of the dataton when sending .

In Access mode, labeled data frames are discarded directly when they are received.

Access mode strips off the VLAN tag of the dataton when sending .

Access mode receives only unlabeled data frames.

When a data frame enters the switch interface, the switch learns the destination MAC address in the data frame.

What is the wrong description of the function of OSPFv3 protocol authentication?

Huawei router OSPFv3 IPSec authentication can not only support transmission mode, but also support tunnel mode

OSPFv3 can only establish a security alliance SA using manual mode

Huawei router OSPFv3 IPSec authentication can not only support transmission mode, but also support tunnel mode

OSPFv3 authentication relies on IPv6 packet authentication headers and encapsulation security net load headers

The OSPFv3 protocol header removes the Type and Automation fields

The OSPF3 protocol is a separately developed protocol that differs somewhat from OSPF2 in that OSPFv3 is link-based rather than network segmented, and the following statement is incorrect?().Single choice questions).

All OSPFv3 interfaces use the Link-Local address as the destination address of the message

Two OSPF routers connected to the link can establish a neighbor relationship even if their IPv6 address prefixes are different

The routing information obtained by the B. OSPFv3 router from the neighbor uses the neighbor's Link-Local address as the next hop in the forwarded packet

For two OSPF routers connected to the link, you can establish a neighbor relationship even if you do not configure a unicast IPv6 address

All OSPFv3 interfaces use the Link-Local address as the destination address of the message

In order to reduce the number of OSPF routes in some unscheduled areas, the OSPF protocol has developed special area functions, and the following characteristic description of ospf special areas is correct?( Single choice questions).

Special area routers cannot establish OSPF neighbor relationships with regular area routers

ASBR-Sunmary-LSA is allowed to be published to NSSA regions

AS-External-LSA is allowed to be published to Stub regions

Any OSPF zone can be configured as a special zone

Special area routers cannot establish OSPF neighbor relationships with regular area routers

Huawei H12-891 Practice Test 4 - Free Online Exam Prep & Questions

Assume that BGP/MPLSIPVVPN, OSPF, LDP, and static routing protocols are already enabled on the PE router . Which of the following protocols need to enable GR on PE in order to get NSF functionality? (Multiple choice questions).

BGP

Static circuit

OSPF

MPLS LDP

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