In a multicast network, what causes multicast traffic to not forward properly?

The router does not have an RPF route

PIM is not enabled on the RPF interface

The upstream router will receive the PIM Join message dropped

The router does not have an RPF route

PIM is not enabled on the RPF interface

The upstream router will receive the PIM Join message dropped

Multi-router egress network, this router is not DR

Which of the following are single-packet attacks?

Special control message attacks

What is wrong with the following statement about digital certificates?

Even if two PRI entities are not in the same CA system, authentication can be completed as long as both parties can recognize each other's CA.

Digital signatures guarantee the integrity of digital certificates.

Digital certificates contain public key information.

Authentication fails when the peer certificate is received within the validity period, but the device itself is in the wrong time if it is not within the validity period of the certificate.

Even if two PRI entities are not in the same CA system, authentication can be completed as long as both parties can recognize each other's CA.

WRED is configured on the newly deployed router HW. What is the correct description of the WRED features below? (Multiple choice questions).

WRED can set different drop thresholds and packet loss rates for packets of different priority

Avoid global synchronization by selectively dropping multiple TCP streams

WRED can set different drop thresholds and packet loss rates for packets of different priority

When the flow exceeds the minimum threshold, WRED begins to discard all inlet flow (tail drop)

Avoid global synchronization by selectively dropping multiple TCP streams

Low-bandwidth traffic is easier to drop than high-bandwidth traffic

Regarding the FTP protocol, is it correct in the description below?

In ftP-style, the client completes the initialization of the TCP session for control and data

In ftP Activee, the server side tells the client which port it expects to send data on by commanding "PORT"

FTP always uses a TCP session to transmit control information and data information

FTP always uses the TCP port to establish a data session and ICP port 21 to establish a control session

FTP always uses TCP port 21 to establish a data session and TCP port 20 to establish a control session

If a Huawei switch runs the RSTP protocol, when will the BPDUs on a port on the switch be aged?

On the interface, RSTP does not age BPDU

after the Forward Delay timeout

In the use of the CP protocol, the following description is correct?

The Eth-Trunk interface can be avoided by frequent oscillation interfaceethtrunkllacppreemptenablelacppreemptdelaydelay- time by following command

Source A address can be configured for load sharing in an enabled link aggregation group with the following command: interface eth-trunk 110ad-balance src-dst-ip

A member interface can be removed from an enabled link aggregation group with the following command: interface GigabitEthernet0/0/1 shutdown interface GigabitEthernet0/0/1 undo eth-trunk 1 interfaceGigabitEthernet0/0/1undoshutdown

The member interface can be joined in the link aggregation group by enabling the following command: interface GigabitEthernet0/0/1 shutdown interface GigabitEthernet0/0/1 trunkport

Which of the following are used in Ethernet?

CSMA/CD in multiplexed interviews

Mac address in canonical format

A MAC address in a non-canonical format

CSMA/CD in multiplexed interviews

Mac address in canonical format

In RSTP , which port provides a backup path to reach the root node of the spanning tree? What state is the port in?

Alternate port and Discarding status

Alternate Port and Forwarding Status

Alternate Port and Learning Status

Designated port and Listening status

Alternate port and Discarding status

The following statement about isis protocol LSP messages is correct

The isP rapid diffusion feature, which first diffuses out LSPs that are smaller than a specified number , speeding up the synchronization process of LSDB

By configuring an LSP-generated smart timer, the timer automatically adjusts the delay time based on the frequency at which the routing information changes

As link status information increases, the packet length of the LSP can be increased so that each ISP can carry more information.

Reducing the minimum interval at which LSPs are sent per port can speed up the diffusion of LSPs.

The isP rapid diffusion feature, which first diffuses out LSPs that are smaller than a specified number , speeding up the synchronization process of LSDB

By configuring an LSP-generated smart timer, the timer automatically adjusts the delay time based on the frequency at which the routing information changes

As link status information increases, the packet length of the LSP can be increased so that each ISP can carry more information.

Reducing the minimum interval at which LSPs are sent per port can speed up the diffusion of LSPs.

Router RI and Router R2 run BGP. Both routers are in the AS65234 The route for router R2 exists in the BGP routing table of the router RI, but not in the IP routing table of the router RI . So what causes the problem to occur? (Single ChoiceQuestions).

The B. BGP neighbor relationship is Down

Router R1 does not enable BGP Multi-hop

Regarding the OSPFv3 protocol, what is the error described below?

Multiple instances can be run in the same OSPFv3 under the same interface

Under the sukugan of a shared router, each OSPFv3 process runs independently

Multiple instances can be run in the same OSPFv3 under the same interface

Can support running multiple instances on a single link

OSPFv3 message header will contain instance IDFu Duan flogging

The following is the correct statement about the LSA of OSPFv3?

Router-LSA and Network-LSA does not contain routing information

When the Intra-AreaPrefixLSA's ReferencedLinkStateType-2, referencedLinkStatelD contains the interface to DR ID

Inter-AreaPrefix-SA's LinkStatelD contains the prefix

Router-LSA and Network-LSA does not contain routing information

When the Intra-AreaPrefixLSA's ReferencedLinkStateType-2, referencedLinkStatelD contains the interface to DR ID

Inter-AreaPrefirLSA also contains LinkLocal information file

There is an existing router interface serial 0 in OSPF area 1 , well will interface Serial 0 is set to silent interface. So what is the impact of this setting?

OSPF does not establish any adjacency relationships through the junction

OSPF establishes usable adjacencies through this junction

OSPF does not join the routes learned from the connector to the local routing table

OSPF does not establish any adjacency relationships through the junction

OSPF receives a route update answer from the neighbor.

Is the following information about BGP4+ described correctly?

BGP4 can use dampening commands to suppress oscillations on IBGP routes.

Modifying the RouterID of BGP causes the BGP connection between routers to be re-established.

BGP4 can use dampening commands to suppress oscillations on IBGP routes.

Modifying the RouterID of BGP causes the BGP connection between routers to be re-established.

The Next Hop attribute in BGP4+ is represented by an IPv6 address, which can be the link-local address of the next hop.

BGP4+ does not support route auto-aggregate

Is the following description of ospf virtual links correct?

Virtual links can be used to solve the problem of zone 0 being segmented

A virtual connection can be established in any area, after which it itself belongs to the region

The virtual connection ip is used as the link address

Virtual links can be used to solve the problem of zone 0 being segmented

The cost of a virtual connection is zero and is the optimal link

What kind of scenario can use AS one path and one filter?

Filter routes received from BGP neighbors based on the AS PATH attribute that the route carries.For example, the command peer x.X.x.x as path-filter import

Filter routes sent to BGP neighbors based on the AS PATH attribute that the route carries. For example, the command peerx. X.x.x as path-filter export

If-natch clause answer in Route-policy.

Filter routes received from BGP neighbors based on the AS PATH attribute that the route carries.For example, the command peer x.X.x.x as path-filter import

The apply clause in Routepolicy

Filter routes sent to BGP neighbors based on the AS PATH attribute that the route carries. For example, the command peerx. X.x.x as path-filter export

If-natch clause answer in Route-policy.

Without dividing the zone, is the following description of the link state routing protocol correct?

Each router establishes a topology for the entire floodplain

Routers in the flood domain may receive the same link state information repeatedly

Routers throughout the flood domain have the same database of wrong-state states

Each router establishes a topology for the entire floodplain

Each router learns route entries directly from the route update and adds them to the routing table

Routers in the flood domain may receive the same link state information repeatedly

Routers throughout the flood domain have the same database of wrong-state states

The router will send all the mis-routing status information from one neighbor to all other neighbors to ensure the synchronization of the database

If an administrator wants to manage certain routes on the router during operations, the following tools are listed below. These routes can be flagged so that administrators can configure policies

If the BGP protocol is running, the route is marked with the community attribute

Use the Tag value to mark the route on the router.

If the BGP protocol is running, the route is marked with the community attribute

Use ACLs to tag routes on the router.

Use the Tag value to mark the route on the router.

Use ipprefix to tag routes on the router.

An existing router running BGP, HW1, has both IBGP neighbors and EBGP neighbors configured on the router. Are the IP Neighbors and EBGP Neighbors described below correctly?

The router sends BGP updates learned from its EBGP neighbors to its other IBGP neighbors and EBGP neighbors

IBGP neighbors can establish neighbor relationships through Loopback engagements

EBGP neighbors must be directly connected, otherwise, EBGP-Multi-hop must configure

The router will be connected directly from its EBGP IBGP neighbor, otherwise, IBGP-Multi-hop must be configured

The router sends BGP updates learned from its EBGP neighbors to its other IBGP neighbors and EBGP neighbors

IBGP neighbors can establish neighbor relationships through Loopback engagements

The router sends BGP updates learned from its IBGP neighbors to its other IBGP neighbors and EPGP neighbors

EBGP neighbors must be directly connected, otherwise, EBGP-Multi-hop must configure

Regarding the cross-domain VPN-OptionB scenario, what is the following description incorrect?

The outer layer label is exchanged between two ASBRs to VPNv4 routes.

In the process of packet forwarding, the private network LSP of the VPN should be exchanged once on the two ASBRs An EBGP neighbor relationship.

scheme is not limited by the number of interconnection links between ASBRs

The outer layer label is exchanged between two ASBRs to VPNv4 routes.

You need to configure smart policy routing on the router to specify that specific traffic is forwarded through an interface. When policy-based routing is applied, what are the two most typical types of information that can be used to forward traffic along a particular path?

Source IP address and specific protocol (such as FTP, HTTP, etc.)

The TTL and source IP address of the packet

Source A address and the Layer 2 source address

Source IP address and specific protocol (such as FTP, HTTP, etc.)

Service type header and message length

Cross-device link aggregation realizes the back-to-back transmission of data traffic and the mutual spare of the heap member switches, but due to the limited bandwidth of the heap cable between the heap devices, the forwarding efficiency can be improved in the following ways?

Enable traffic to be forwarded locally first

Connect the stacking device via a stacking card

Configure the stacking system MAC address switching

Enables the stacking multi-master check function

Is the following description of THE MUX VLA N in huawei switches correct?

The Principal port can pass the answer to all ends within the MUX VLAN

MUX VLAN ??Principal VI-AN ?Subordinate VI-AN ???Separate VLAN ? Isolate VLAN

Each Separate VLAN can bind multiple Principal VLANs

Under the same VLAN, muX VLANs can be mixed with SuperVLANs

The Principal port can pass the answer to all ends within the MUX VLAN

Router R1 runs the OSPF protocol, use the "display ip routing-table" command to view the routing table of the router R1, the following about the OSPF in the routing table Is the information described correctly?

In the routing table, the routing table entry identified with the "O_ASE" identifier can only be learned by routing introduction

In the routing table, route table entries identified by the "OSPF" identifier can only be learned through LSAs of Type 3

In the routing table, the routing table entries identified by the "OSPF" identifier can only pass Class 1 LSA

In the routing table, the routing table entries identified by the "OSPF" identifier can be learned through the 1/2/3/5 LSA

In the routing table, the routing table entry identified with the "O_ASE" identifier can only be learned by routing introduction

The following statement about the five types of LSAs in OSPF is used to pass external routes, and the following statement about the five types of LSAs is incorrect and flooding in

The FA address is included in the five types of LSAs, and the FA address is 000 only as reserved for no practical purpose

OSPF networks in non-Stub/NSSA regions

Routers in the same zone as ASBR can calculate external routes by chanting the LSA and the five types of ISAs in the region

The FA address is included in the five types of LSAs, and the FA address is 000 only as reserved for no practical purpose

Configuring the appropriate filtering policy on the ABR or ASBR can filter five types of LSAs

Huawei H12-891 Practice Test 2 - Free Online Exam Prep & Questions

What is the following correct for the process of registering the source-side DR with RP in PIM-SM?

Encapsulated in the registered message is multicast service data

RP sends a registration stop message as soon as it receives the registration message.

Registered messages are used to build the RPT tree between source DR and RP

Registered packets are multicast packets.

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