Which is the correct description of optimal routing election for each protocol in the following options?( Radio).

From BGP and OSPF, different route entries to reach the same destination segment are learned, and the optimal route is selected to join the IP route table by comparing the protocol's preference value .

Route entries in BGP that are unreachable for the next hop are also placed in the IP routing table.In the

BGP protocol, the best route to reach the same destination circumference is selected by comparing the cost values of the route entries.

The OSPF protocol puts all the routing information in the LSDB into the IP routing table.

From BGP and OSPF, different route entries to reach the same destination segment are learned, and the optimal route is selected to join the IP route table by comparing the protocol's preference value .

The following description of ISIS's routed infiltration is correct?( Multi-select)

ISIS routing penetrates | Can be used in Pv6 environments.

Route penetration of ISIS does not cause neighbor concussions.

ISIS routing penetrates | Can be used in Pv6 environments.

Route penetration for ISIS can be deployed on Level-1 routers.

Route penetration for ISIS does not include aggregated routes.

Route penetration of ISIS does not cause neighbor concussions.

Route infiltration of ISIS is used to prevent routing loops.

The following statement about the BFD one-arm echo function is correct (multiple choice).

After the BFD one-arm echo function is turned on, the destination IP and source IP of the BFD message are inducted

BFD One-Arm Echo function is suitable for scenarios where one device supports BDD and the other device does not support

The BFD one-arm echo function must be configured with local identifiers and carrier identifiers

The default destination IP address for the protocol message for BFD one-arm echo is 22400184

After the BFD one-arm echo function is turned on, the destination IP and source IP of the BFD message are inducted

BFD One-Arm Echo function is suitable for scenarios where one device supports BDD and the other device does not support

The following statements about the VRRP protocol are correct (multiple choice).

VRRPv3 does not support authentication, while VRRPV2 does

Both VRRPv2 and VRRPv3 support authentication

VRRPv3 does not support authentication, while VRRPV2 does

VRRPv2 only applies to IPv4 networks, and VRRPv3 only applies to IPv6 networks

The owner of the Master IP address has a VRP priority of 255, and all configurable priorities range from 0 to 254

When you deploy LLQ, you need to configure bandwidth parameters, what is the significance of bandwidth parameters?( Single choice questions).

Provides a built-in policer to limit the maximum available bandwidth of a low-latency queue during congestion

The parameter should be as small as possible. It means that the bandwidth is always preserved, and even if the LLQ is set, changing the parameters will reduce the available bandwidth of the interface

It represents a reference CIR to calculate the burst size D of the built-in tactician token bucket Changing parameters is an option because LLQ always takes precedence over other queues

As shown in the figure, there are two IP6 networks that can access the IPv4 network, and the IPsec tunnel needs to be established between the two IPv6 networks to communicate, which of the following requirements?(). Single choice questions).

None of the above options are correct

Router HW1 and Router HW2 connect Network A and Network B, respectively. As shown in the figure below, if you want to set up an IPsec VPN between router HWI and router HW. (single selection).

rule permit ip source 101.1.0000255 destination 101.20000255

rule permit ip source 1921681.10 destination 1921681.20

rule permit ip source 101.1.0000255 destination 1921681.20

rule permit ip source 101.1.0000255 destination 101.20000255

rule permit ip source 1921681.10 destination 101. 20000255

rule permit ip source 101.20 000255 destination 101.1.0000255

Which of the following options is described correctly for the assertion mechanism?( Radio).

In the assertion mechanism, the winner is responsible for forwarding multicast data to the broadcast segment

Winner's election process does not make IP address size a condition of the election

In the assertion mechanism, the winner is responsible for forwarding multicast data to the broadcast segment

The assertion mechanism is used for the election of DR

In the assertion mechanism, the loser will shut down the interface with the broadcast network necklace

The BSR/RP mechanism described below describes the correct determination ?( Multiple choice questions).There can be multiple C-BSRs in the

PIM-SM domain, but only one BSR can be elected.

BSR collects C-RP information by receiving packets of C-RP

BSR advertises BSR and C-RP information to all routers in the PIM-SM domain via flood bootstrap messages

PIM-SM domain, but only one BSR can be elected.

BSR collects C-RP information by receiving packets of C-RP

BSR advertises BSR and C-RP information to all routers in the PIM-SM domain via flood bootstrap messages

A C-BSR can also collect C-RP information by receiving C-RP packets

The following description of LDP reliability is incorrectly ?( Radio).

Manually configured LDP FRR policies default to 32-bit backup routes that trigger LDP to establish backup LSPs

LGP GR takes advantage of the high difference between the LS forwarding plane and the control plane to realize that the device forwards without interruption when the protocol is restarted or the master-standby is reversed

Manually configured LDP FRR policies default to 32-bit backup routes that trigger LDP to establish backup LSPs

LLDPFRR also allows LSPs to be generated for tag mappings from non-optimal next hops, and as a live LSP backup, supervising forwarding table entries

LDP and IGP linkage, the need for IGP has been routed to release, to ensure that LDP and LGP path consistent

Regarding the LDP protocol session establishment process, the description is correct?

When both parties receive a keepalive message from the peer, the LDP session is successfully established

After the TCP connection is successfully established, the active party sends an initialization message to negotiate the relevant parameters of the LDP session,

The party with the larger transmission address initiates the establishment of a TCP connection as the active party

When both parties receive a keepalive message from the peer, the LDP session is successfully established

Hello messages discovered by LDP neighbors use TCP messages with a destination address of multicast address 224002

After the TCP connection is successfully established, the active party sends an initialization message to negotiate the relevant parameters of the LDP session,

The party with the larger transmission address initiates the establishment of a TCP connection as the active party

Regarding the MPLS handling mode of TTL, the following description is correct?

MPLS tags in the TTL, which mean the same as the TTL domain in the IP header. TTL prevents mpLS networks from creating routing loops

Pipe mode. When an IP message passes through an MPLS network, the IPTTL minus l at the entry point is mapped to the MPLS TTL field

MPLS tags in the TTL, which mean the same as the TTL domain in the IP header. TTL prevents mpLS networks from creating routing loops

In Unifor mode, when an IP message passes through an MPLS network, the inbound IPTTL is minus

The MPLSTTL field is a fixed value

In MMLSVPI, if you need to hide the structure of the MPLS backbone network, you can use the Uniform mode on Ingress for private network messages

WRED is configured on the newly deployed router HW The following description of the WRED feature is correct as ?( Multiple select).

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

Avoid global synchronization by selectively dropping multiple TCP streams Low-bandwidth traffic is easier to drop than high-bandwidth traffic

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

When traffic exceeds the minimum threshold, WRED starts dropping all ingress traffic (tail drops).

Avoid global synchronization by selectively dropping multiple TCP streams Low-bandwidth traffic is easier to drop than high-bandwidth traffic

Regarding the FTP protocol, which of the descriptions below is correct?

In FTP Passive mode, the client completes the initialization of the TCP session for control and data

In FTP Active mode, the server 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 TCP port 20 to establish a data session, and ICP port 21 to establish control will always use E. FTP TCP port 21 to establish a data session, TCP port 20 to establish a control session

As shown in the figure, RI, R2 establishes an EBGP neighbor and turns on the BFD detection function, the following statement is correct

R1 Detection time for BFD packets The detection time for BFD packets for 660ms

Detection time for BFD packets for AR2 800ms

R1 Detection time for BFD packets for 1280ms

R1 Detection time for BFD packets The detection time for BFD packets for 660ms

In the use of the LACP protocol, the following description is correct ?( Multiple select).

You can avoid the Eth-Trunk interface from frequently shaking interface eth-trunk 1l lacp preempt enable lacp preempt delay delay-time with the following command

The member interface can be removed from an enabled link aggregation group with the following command: interface GigabitEthemeto/0/1 Shutdown nterface Gigabithemet/O/1undo ethtrunklinterface GigabitEthemet0/0/1 undo shutdown

You can avoid the Eth-Trunk interface from frequently shaking interface eth-trunk 1l lacp preempt enable lacp preempt delay delay-time with the following command

Source IP address load sharing, interface eth-trunk1Load-balance src-dst-ip, can be configured in an enabled link aggregation group with the following command

The member interface can be removed from an enabled link aggregation group with the following command: interface GigabitEthemeto/0/1 Shutdown nterface Gigabithemet/O/1undo ethtrunklinterface GigabitEthemet0/0/1 undo shutdown

A chain cluster that can be initiated through an order Join the member interface :interface GigabitEthemeto/0/1 shutdown interface igabitEthemetO/0/1 tunkportGigabitEthermet0/0/1 interface GigabitEthermet0/0/1 Undo shutdown

The following statement about is the ISIS protocol LSP message is correct

LSP fast diffusion feature, first diffuse less than the specified number of LSPs, to speed up the synchronization process of LSDB

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

When the link status information increases, the message length of the LSP can be increased so that each LSP can carry more information.

Reducing the minimum time interval for sending LSPs per port can speed up the diffusion of LSPs.

LSP fast diffusion feature, first diffuse less than the specified number of LSPs, to speed up the synchronization process of LSDB

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

When the link status information increases, the message length of the LSP can be increased so that each LSP can carry more information.

Reducing the minimum time interval for sending LSPs per port can speed up the diffusion of LSPs.

Router RL and Router R2 run BGP both routers are in the AS65234 The router R2 route is present in the BGP routing table of router RI, but not in the P of router R1 road

Router R1 does not enable BGPMulti-hop D Routing is not optimal

With BGP, both routers are in the AS65234 Route cry PD is done by the right big worker

By the table, so what causes the problem to occur? A, synchronization is turned off

The B. BGP neighbor relationship is Down

Router R1 does not enable BGPMulti-hop D Routing is not optimal

As shown in the following figure, R1 and R2 establish a neighbor relationship for Level2, which is critical: placed as follows, then the following about The route entry for R2 is correct

The 0:/64 router appears in the IP routing table

2022:/64 Routers appear in the IP routing table c.2019::/64 Routers appear in the P routing table

2021:-/64 Router will appear in the P routing table

The 0:/64 router appears in the IP routing table

2022:/64 Routers appear in the IP routing table c.2019::/64 Routers appear in the P routing table

2021:-/64 Router will appear in the P routing table

Regarding the OSPFv3 protocol, the following description is incorrect?

In the same OSPFv3 process under the same interface, you can run multiple instances of

In the case of sharing a single router, each OSPFV3 process runs independently

In the same OSPFv3 process under the same interface, you can run multiple instances of

You can support running multiple instances on a single link

OSPFv3 message header will contain the Instance ID field

The following is correct about the LSA of OSPFv3

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

When the Referenced Link State Type-2 of the Intra-AreaPrefixLSA, referenced Link State ID Contains the interface ID of the DR

The Link State ID of inter-area prefix-SA, which contains prefix information

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

When the Referenced Link State Type-2 of the Intra-AreaPrefixLSA, referenced Link State ID Contains the interface ID of the DR

Inter-Area PrefirLSA also contains LinkLocal Information

As shown in the figure, a company sets up an OSPF network. The links in the figure all form OSPF adjacencies, and all OSFP devices declare their own loopback addresses. One day SIR2 The two links of the S2AR1 suddenly failed, and in order to detect if the network was operating properly, the engineers performed a device status check, which is correct as described below

R5 can normally learn the loopback route to R2

R3 can not learn the loopback route to R2

R5 can normally learn the loopback route to R2

R3 can not learn the loopback route to R2

R1 can normally learn the loopback route

R3 of R2 The loopback route of R2 can be learned normally

The interface Serial0 of an existing router is in OSPF area 1, and the interface Serial0 is set to Silent interface. So what kind of impact will this setting have

OSPF does not establish any neighboring relationships through this interface D. OSPF receives routing updates from neighbors

OSPF establishes available adjacencies through this interface

OSPF does not add routes learned from the interface to the local routing table

OSPF does not establish any neighboring relationships through this interface D. OSPF receives routing updates from neighbors

What kind of scenario can use AS-path-filter?( Multiple select).

A Filters routes received from BGP neighbors based on the AS PATH attribute carried by the route, such as 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 peer x.x.x.x as path-filter export

The if-match clause in Route-policy

A Filters routes received from BGP neighbors based on the AS PATH attribute carried by the route, such as the command peer X.x.x.x as path-filter import

The apply clause in Route policy

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

The if-match clause in Route-policy

In the following topology diagram, R1 can be established between R2 and R3 fetches the Internet, RI and R2, R1 and R3 EGP connections, R2, R3 belong to the same AS The default routes are issued through BGP separately, requiring R2 to be preferred for traffic accessed by RI to the Internet, and the following practices can be achieved

R1 specifies that peer R3 sets the MED property to 150 in the import direction

R1 specifies the peer R2 sets the local priority in the import direction to 150

R1 specifies that peer R3 sets the MED property to 150 in the import direction

R2 specifies that peer R1 is in export The direction setting local priority is 150

R2 specifies peer R1 in the export direction setting MED property to 150

R1 specifies the peer R2 sets the local priority in the import direction to 150

The existing router HWl running BGP is configured with both IBGP neighbors and EBGP tenants. The following descriptions about IBGP Neighbors and EBGP Neighbors are correct?

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 the Loopback interface

EBGP neighbors must be directly connected, otherwise, EBGP-Multi-hop must be configured with

The router will have an EBGP BGP neighbor from it must be connected directly, otherwise, IBGPMulti- 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 the Loopback interface

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 be configured with

Huawei H12-891 Practice Test 10 - Free Online Exam Prep & Questions

The firewall has created some security zones by default, which of the following security zones does not exist by default on the firewall?( Radio).

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Huawei H12-891 Practice Test 10

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