300-410: Implementing Cisco Enterprise Advanced Routing and Services (300-410 ENARSI)

Which configuration feature should be used to block rogue router advertisements instead of using the IPv6 Router Advertisement Guard feature?

VACL blocking broadcast frames from nonauthorized hosts
PVLANs with promiscuous ports associated to route advertisements and isolated ports for nodes
PVLANs with community ports associated to route advertisements and isolated ports for nodes
IPv4 ACL blocking route advertisements from nonauthorized hosts

Correct answer: B

Explanation:

The IPv6 Router Advertisement Guard feature provides support for allowing the network administrator to block or reject unwanted or rogue router advertisement guard messages that arrive at the network device platform. Router Advertisements are used by devices to announce themselves on the link. The IPv6 Router Advertisement Guard feature analyzes these router advertisements and filters out router advertisements that are sent by unauthorized devices.Certain switch platforms can already implement some level of rogue RA filtering by the administrator configuring Access Control Lists (ACLs) that block RA ICMP messages that might be inbound on ''user'' ports.

The IPv6 Router Advertisement Guard feature provides support for allowing the network administrator to block or reject unwanted or rogue router advertisement guard messages that arrive at the network device platform. Router Advertisements are used by devices to announce themselves on the link. The IPv6 Router Advertisement Guard feature analyzes these router advertisements and filters out router advertisements that are sent by unauthorized devices.

Certain switch platforms can already implement some level of rogue RA filtering by the administrator configuring Access Control Lists (ACLs) that block RA ICMP messages that might be inbound on ''user'' ports.

A company Is redesigning WAN infrastructure so that all branch sites must communicate via the head office and the head office can directly communicate with each site independently. The network engineer must configure the head office router by considering zero-touch technology when adding new sites in the same WAN infrastructure. Which configuration must be applied to the head office router to meet this requirement?

Option A
Option B
Option C
Option D

Correct answer: D

Refer to the exhibit.

An engineer must configure a LAN-to-LAN IPsec VPN between R1 and the remote router. Which IPsec Phase 1 configuration must the engineer use for the local router?

crypto isakmp policy 5authentication pre-shareencryption 3deshash shagroup 2!crypto isakmp key cisco123 address 200.1.1.3
crypto isakmp policy 5authentication pre-shareencryption 3deshash md5group 2!crypto isakmp key cisco123 address 200.1.1.3
crypto isakmp policy 5authentication pre-shareencryption 3deshash md5group 2!crypto isakmp key cisco123 address 199.1.1.1
crypto isakmp policy 5authentication pre-shareencryption 3deshash md5group 2!crypto isakmp key cisco123! address 199.1.1.1

Correct answer: A

Explanation:

In the ''crypto isakmp key ... address '' command, the address must be of the IP address of the other end (which is 200.1.1.3 in this case) so Option A and Option B are correct. The difference between these two options are in the hash SHA or MD5 method but both of them can be used although SHA is better than MD5 so we choose Option A the best answer.Note: Cisco no longer recommends using 3DES, MD5 and DH groups 1, 2 and 5.5/sec-ipsec-management-xe-16-5-book/sec-ipsec-usability-enhance.html

In the ''crypto isakmp key ... address '' command, the address must be of the IP address of the other end (which is 200.1.1.3 in this case) so Option A and Option B are correct. The difference between these two options are in the hash SHA or MD5 method but both of them can be used although SHA is better than MD5 so we choose Option A the best answer.

Note: Cisco no longer recommends using 3DES, MD5 and DH groups 1, 2 and 5.

5/sec-ipsec-management-xe-16-5-book/sec-ipsec-usability-enhance.html

Refer to the exhibit.

Refer to the exhibit. Router ABR-Rtr is not propagating the internet routes in OSPF area 10. which causes internet reachability problems in the area. Which action resolves the issue?

ABR-Rtr must configure the default-information originate always command.
ABR-Rtr must configure the area 10 stub no-summary command.
ABR-Rtr network type must be broadcast network.
ABR-Rtr must advertise the 0.0.0.0/0 default route in area 10.

Correct answer: D

Refer to the exhibit.

Refer to the exhibit. R1 uses SP1 as the primary path. A network engineer must force all SSH traffic generated from R1 toward SP2. Which configuration accomplishes the task?

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Correct answer: C

What are two characteristics of a VRF instance? (Choose two)

It is defined by the VPN membership of a customer site attached to a P device.
Each VRF has a different set of routing and CEF tables.
AII VRFS share customers routing and CEF tables.
An interface must be associated to one VRF
A customer site can be associated to different VRFs.

Correct answer: B, D

Refer to the exhibit.

Refer to the exhibit. Users on a call center report that they cannot browse the internet on Saturdays during the afternoon. Which configuration resolves the issue?

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[@_img_cfc79974-68a2-455b-80a0-7d98cb7ab096_@]

Correct answer: D

Refer to the exhibit.

Refer to the exhibit Which action ensures that 10 10 10 0/24 reaches 10 10 20 0/24 through the direct link between R1 and R2?

Configure R1 and R2 LAN links as nonpassive.
Configure R1 and R2 links under area 1
Configure OSPF link cost to 1 between R1 and R2
Configure OSPF path cost to 3 between R1 and R2

Correct answer: B

Refer to the exhibit.

Refer to the exhibit. An administrator must harden a router, but the administrator failed to test the SSH access successfully to the router. Which action resolves the issue?

Configure SSH on the remote device to log m using SSH
SSH syntax must be ssh -I user ip to log in to the remote device
Configure enable secret to log in to the device
SSH must be allowed with the transport output ssh command

Correct answer: B

Refer to the exhibit.

Refer to lhe exhibit An engineer must filter EIGRP updates that are received to block all 10 10 10.0/24 prefixes The engineer tests the distribute list and finds one associated prefix. Which action resolves the issue?

There is a permit in the route map that allows this prefix A deny 20 statement is required with a match condition to match a new ACL that denies all prefixes
There is a permit in the ACL that allows this prefix into EI6RP. The ACL should be modified to deny 10.10.10.0 0.0.0.255.
There is a permit in the route map that allows this prefix A deny 20 statement is required with no match condition to block the prefix.
There is a permit in the ACL that allows this prefix into EIGRP. The ACL should be modified to deny 10.10.10.0 255.255.255.0.

Correct answer: B

Vendor:	Cisco
Exam Code:	300-410
Exam Name:	Implementing Cisco Enterprise Advanced Routing and Services (300-410 ENARSI)
Date:	Feb 04, 2026
File Size:	16 MB

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