Implementing Cisco Enterprise Advanced Routing and Services 300-410-ENARSI

Cisco (300-410-ENARSI) Exam Questions And Answers page 18

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What are the effects of using the passive-interface command in RIP? (Choose two.)

Multiple Choice

What does the passive-interface command do when implement with RIP? (Choose two.)

Allows an interface to receive routing update traffic

Prevents an interface from sending routing update traffic

Prevents an interface from sending any normal data traffic

Allows an interface to receive normal data traffic

Disables a router interface

Places a router interface in standby mode

Layer 3 Technologies Infrastructure Security and Services

Correct Answers:

Allows an interface to receive routing update traffic
Prevents an interface from sending routing update traffic

Explanation:

The effect of the passive-interface command is dependent on the routing protocol running on the interface. For EIGRP, the router will not only stop sending routing updates, but also hellos, which means that it will not form a neighbor relationship with another EIGRP router on that interface. This is also the case with OSPF and IS-IS. With RIP, however, the router will continue to send hellos even as it stops sending routing updates, and it will still receive routing updates. An example of using the passive-interface command is below. The command is issued from the router configuration mode.
Router(config-router)# passive-interface ethernet 0/0

The passive-interface command will even overrule a configuration that includes a distribute list that allows the advertisement of a network through the interface. Examine the partial output of the show run command taken from a router running EIGRP below:
router6#show run
!
router eigrp 100
network 10.16.18.0 0.0.255.255
network 10.16.19.0 0.0.255.255
passive-interface serial 0/0
distribute-list 50 out serial 0/0
!
Access-list 50 permit 10.16.8.0 0.0.255.255

In this case, although the distribute list allows the advertisement of the 10.16.8.0 network, the passive-interface command applied to the Serial 0/0 interface will disallow all outgoing and incoming updates.
The passive-interface command does not affect the transmission or reception of normal data traffic, only routing updates.
The passive-interface command does not disable the router interface. The shutdown command is used to disable a router interface.
The passive-interface command does not place the router in standby mode.
Objective:
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Sub-Objective:
Configure and verify loop prevention mechanisms
Cisco > Home > Support > Technology Support > IP > IP Routing > Design > Design Technotes > How Does the Passive Interface Feature Work in EIGRP?
Cisco > Cisco IOS IP Routing: Protocol-Independent Configuration Guide, Release 12.4 > Configuring IP Routing Protocol-Independent Features > Filtering Routing Information
Cisco > Cisco IOS IP Routing: Protocol-Independent Command Reference > passive-interface

What is the IPv4 prefix conversion performed by the PE router in an MPLS VPN?

Single Choice

What does the PE router convert the IPv4 prefix to within an MPLS VPN?

eBGP path association between the PE and CE sessions

prefix that combines the ASN, PE router-id, and IP prefix

48-bit route combining the IP and PE router-id

VPN-IPv4 prefix combined with the 64-bit route distinguisher

Layer 3 Technologies VPN Technologies

What are the advantages of using BFD (Bidirectional Forwarding Detection)?

Single Choice

What is an advantage of using BFD?

It detects local link failure at layer 1 and updates routing table.

It detects local link failure at layer 3 and updates routing protocols.

It has sub-second failure detection for layer 1 and layer 3 problems.

It has sub-second failure detection for layer 1 and layer 2 problems.

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What is the prerequisite for configuring BFD in network configurations?

Single Choice

What is a prerequisite for configuring BFD?

Jumbo frame support must be configured on the router that is using BFD.

All routers in the path between two BFD endpoints must have BFD enabled.

Cisco Express Forwarding must be enabled on all participating BFD endpoints.

To use BFD with BGP, the timers 3 9 command must first be configured in the BGP routing process.

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What is a use case for the HSRP configuration provided?

Single Choice

What would be a use case for the HSRP configuration below?

used to switch the active role to the other router in the HSRP group during a maintenance window

used to prevent this router from ever relinquishing the active role

used to prevent this router from ever performing the active role

used to allow preemption over multiple peers

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Which technology enables spoke routers to use dynamic IP addressing in DMVPN configuration?

Single Choice

When configuring a DMVPN solution, which of the following technologies makes it possible for the spoke routers to use dynamic IP addressing?

IPsec

mGRE

NHRP

Dynamic routing protocols

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How can the engineer prevent routing protocol flapping while configuring Control Plane Policing?

Single Choice

When configuring Control Plane Policing on a router to protect it from malicious traffic, an engineer observes that the configured routing protocols start flapping on that device.

Which action in the Control Plane Policy prevents this problem in a production environment while achieving the security objective?

Set the conform-action and exceed-action to transmit initially to test the ACLs and transmit rates and apply the Control Plane Policy in the output direction.

Set the conform-action and exceed-action to transmit initially to test the ACLs and transmit rates and apply the Control Plane Policy in the input direction.

Set the conform-action to transmit and exceed-action to drop to test the ACLs and transmit rates and apply the Control Plane Policy in the input direction.

Set the conform-action to transmit and exceed-action to drop to test the ACLs and transmit rates and apply the Control Plane Policy in the output direction.

Layer 3 Technologies Infrastructure Security and Services

What is the reason for the error "Cannot select the device. Not compatible with template" in Cisco DNA Center?

Single Choice

When provisioning a device in Cisco DNA Center, the engineer sees the error message Cannot select the device. Not compatible with template .

What is the reason for the error?

The template has an incorrect configuration.

The software version of the template is different from the software version of the device.

The changes to the template were not committed.

The tag that was used to filter the templates does not match the device tag.

Architecture Infrastructure Services

Which element must be configured with an authentication mechanism when using the auth keyword in the snmp-server host command?

Single Choice

When the auth keyword is used in the snmp-server host command, which of the flowing must be configured with an authentication mechanism?

the interface

the host

the user

the group

Layer 3 Technologies Infrastructure Security and Services

What attribute eliminates LFAs on protected paths connected through a common fiber in a network?

Single Choice

Which attribute eliminates LFAs that belong to protected paths in situations where links in a network are connected through a common fiber?

shared risk link group-disjoint

linecard-disjoint

lowest-repair-path-metric

interface-disjoint

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Cisco (300-410-ENARSI) Exam Questions And Answers page 18

What are the effects of using the passive-interface command in RIP? (Choose two.)

Correct Answers:

Explanation:

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What is the IPv4 prefix conversion performed by the PE router in an MPLS VPN?

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What are the advantages of using BFD (Bidirectional Forwarding Detection)?

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What is the prerequisite for configuring BFD in network configurations?

Correct Answer:

References:

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What is a use case for the HSRP configuration provided?

Correct Answer:

Explanation:

Comments

Which technology enables spoke routers to use dynamic IP addressing in DMVPN configuration?

Correct Answer:

Explanation:

Comments

How can the engineer prevent routing protocol flapping while configuring Control Plane Policing?

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What is the reason for the error "Cannot select the device. Not compatible with template" in Cisco DNA Center?

Correct Answer:

References:

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Which element must be configured with an authentication mechanism when using the auth keyword in the snmp-server host command?

Correct Answer:

Explanation:

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What attribute eliminates LFAs on protected paths connected through a common fiber in a network?

Correct Answer:

References:

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