Latest [Nov 12, 2025] 300-410 Exam with Accurate Implementing Cisco Enterprise Advanced Routing and Services PDF Questions

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NEW QUESTION # 235
Which statement about IPv6 RA Guard is true?

• A. It cannot be configured on a switch port interface in the ingress direction.
• B. It does not offer protection in environments where IPv6 traffic is tunneled.
• C. Packets that are dropped by IPv6 RA Guard cannot be spanned.
• D. It is not supported in hardware when TCAM is programmed.

Answer: B

Explanation:
Reference:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6_fhsec/configuration/xe-16/ip6f-xe-16-book/ip6-ra-guard.pdf

NEW QUESTION # 236
Refer to the exhibit.

An engineer configures SW101 to send OSPFv3 interfaces state change messages to the server. However, only some OSPFv3 errors are being recorded. which organization resolves the ..?

• A. snmp-server enable traps ospfv3 state-change if-state-change
• B. snmp-server-enable traps ospfv3 state-change neighbor-state-change.
• C. snmp-server-enable traps ospfv3 state-change if-state-change neighbor-state-change
• D. snmp-server-enable traps ospfv3 state-change restart-status-change

Answer: C

NEW QUESTION # 237
What is an advantage of implementing BFD?

• A. BFD provides better capabilities to maintain the routing table
• B. BFD provides faster updates for any flapping route.
• C. BFD is deployed without the need to run any routing protocol
• D. BFD provides millisecond failure detection

Answer: D

NEW QUESTION # 238
Refer to the exhibit.

The Internet traffic should always prefer Site-A ISP-1 if the link and BGP connection are up; otherwise, all Internet traffic should go to ISP-2 Redistribution is configured between BGP and OSPF routing protocols and it is not working as expected. What action resolves the issue?

• A. Set metric-type 1 at Site-A RTR1, and set metric-type 2 at Site-B RTR2
• B. Set metric-type 2 at Site-A RTR1, and set metric-type 1 at Site-B RTR2
• C. Set OSPF cost 100 at Site-A RTR1, and set OSPF Cost 200 at Site-B RTR2
• D. Set OSPF cost 200 at Site: A RTR1 and set OSPF Cost 100 at Site-B RTR2

Answer: A

Explanation:
OSPF type 1 route is always preferred over a type 2 route for the same destination so we can set metric-type 1 at Site-A RTR1 so that it is preferred over Site-B RTR2.
Note:
Routes are redistributed in OSPF as either type 1 (E1) routes or type 2 (E2) routes, with type 2 being the default.
- A type 1 route has a metric that is the sum of the internal OSPF cost and the external redistributed cost.
- A type 2 route has a metric equal only to the redistributed cost.
- If routes are redistributed into OSPF as type 2 then every router in the OSPF domain will see the same cost to reach the external networks.
- If routes are redistributed into OSPF as type 1, then the cost to reach the external networks could vary from router to router.

NEW QUESTION # 239
Refer to the exhibit.

Which two actions restrict access to router R1 by SSH? (Choose two.)

• A. Remove sequence 10 from access list 100 and add sequence 20 deny tcp any any eq telnet to access list 199
• B. Configure transport output ssh on line vty and remove sequence 20 from access list 100.
• C. Configure transport input ssh on line vty and remove sequence 30 from access list 100.
• D. Remove class-map ANY from service-policy CoPP
• E. Configure transport output ssh on line vty and remove sequence 10 from access list 199.

Answer: A,B

NEW QUESTION # 240
Refer to the exhibit.

A user has set up an IP SLA probe to test if a non-SLA host web server on IP address 10.1.1.1 accepts HTTP sessions prior to deployment. The probe is failing. Which action should the network administrator recommend for the probe to succeed?

• A. Add icmp-echo command for the host.
• B. Re-issue the ip sla schedule command.
• C. Add the control disable option to the tcp connect.
• D. Modify the ip sla schedule frequency to forever.

Answer: C

NEW QUESTION # 241
Refer to the exhibit.

R2 is a route reflector, and R1 and R3 are route reflector clients. The route reflector learns the route to
172.16.25.0/24 from R1, but it does not advertise to R3. What is the reason the route is not advertised?

• A. R2 does not have a route to the next hop, so R2 does not advertise the prefix to other clients.
• B. Route reflector setup requires full IBGP mesh between the routers.
• C. In route reflector setups, prefixes are not advertised from one client to another.
• D. In route reflector setup, only classful prefixes are advertised to other clients.

Answer: A

NEW QUESTION # 242
What are two functions of IPv6 Source Guard? (Choose two.)

• A. It works independent from IPv6 neighbor discovery.
• B. It denies traffic by inspecting neighbor discovery packets for specific pattern.
• C. It uses the populated binding table for allowing legitimate traffic.
• D. It blocks certain traffic by inspecting DHCP packets for specific sources.
• E. It denies traffic from unknown sources or unallocated addresses.

Answer: C,E

Explanation:

NEW QUESTION # 243
Refer to the exhibit.

The network administrator configured the Chicago router to mutually redistribute the LA and NewYork routes with OSPF routes to be summarized as a single route in EIGRP using the longest summary mask:

After the configuration, the New York router receives all the specific LA routes but the summary route. Which set of configurations resolves the issue on the Chicago router?

• A. Option C
• B. Option A
• C. Option B
• D. Option D

Answer: C

NEW QUESTION # 244
Refer to the exhibit.

An engineer is troubleshooting BGP on a device but discovers that the clock on the device does not correspond to the time stamp of the log entries. Which action ensures consistency between the two times?

• A. Configure the service timestamps log uptime command in global configuration mode.
• B. Configure the service timestamps log datetime localtime command in global configuration mode.
• C. Configure the logging clock synchronize command in global configuration mode.
• D. Make sure that the clock on the device is synchronized with an NTP server.

Answer: B

Explanation:
https://www.cisco.com/c/en/us/td/docs/routers/xr12000/software/xr12k_r3-9/system_management/command/refe By default, syslog and debug messages are stamped by UTC, regardless of the time zone that device configured. You should append localtime key word to "service timestamp {log | debug} datetime msec" global command to change that behavior.
https://community.cisco.com/t5/networking-documents/router-log-timestamp-entries-are-different-from-the-syste
https://www.cisco.com/E-Learning/bulk/public/tac/cim/cib/using_cisco_ios_software/cmdrefs/service_timestamp

NEW QUESTION # 245
Exhibit:

An engineer configured R2 and R5 as route reflectors and noticed that not all routes are sent to R1 to advertise to the eBGP peers. Which iBGP routers must be configured as route reflectors to advertise all routes to restore reachability across all networks?

• A. R1 and R4
• B. R2 and R5
• C. R1 and R5
• D. R4 and R5

Answer: D

Explanation:
When R2 & R5 are route reflectors (RRs), routes from R4 & R8 are advertised to R5 and R5 advertises to R2. But R2 would drop them as R2 is also a RR. Thereforesome routes are missing on R1 to advertise to eBGP peers.
Good reference: https://www.ciscolive.com/c/dam/r/ciscolive/emea/docs/2015/pdf/TECRST-2310.pdf Route reflectors (RR) must be fully iBGP meshed so we cannot configure RR on both R1 and R5.
We should choose routers at the center of the topology RRs, in this case R4 & R5.

NEW QUESTION # 246
Refer to the exhibit. In an attempt to increase the network security, the administrator applied the Gi3-in ACL to the Gi3 interface. After the ACL was applied, clients in the network connected to Gi3 lost their ability to obtain IP settings from DHCP.
Which two configuration commands must be added to the Gi3-in ACL to reinstate the DHCP service for the clients? (Choose two.)

• A. 71 permit udp host 0.0.0.0 eq bootps host 255.255.255.255 eq bootpc
• B. 72 permit udp host 192.168.255.3 eq bootps 192.168.30.0 0.0.0.255 eq bootpc
• C. 75 permit udp host 0.0.0.0 eq bootpc host 255.255.255.255 eq bootps
• D. 74 permit udp 192.168.30.0 0.0.0.255 eq bootpc host 192.168.255.3 eq bootps
• E. 73 permit udp host 0.0.0.0 eq bootpc host 192.168.255.3 eq bootps

Answer: B,C

NEW QUESTION # 247

Refer to the exhibit. A network administrator configured NetFlow data, but the data is not visible at the NetFlow collector. Which configuration allows the router to send the records?

• A. Rectify NetFlow collector reachability from the management interface.
• B. Configure a different interface to send the records.
• C. Configure the NetFlow collector to listen at export-protocol netflow-v5.
• D. Configure the management interface in the global routing table to send the records.

Answer: B

NEW QUESTION # 248
Refer to the exhibit. The network administrator has configured the Customer Edge router (AS
64511) to send only summarized routes toward ISP-1 (AS 100) and ISP-2 (AS 200).


After this configuration. ISP-1 and ISP-2 continue to receive the specific routes and the summary route. Which configuration resolves the issue?

• A.
• B.
• C.
• D.

Answer: D

Explanation:
When the aggregate-address command is used within BGP routing, the aggregated address is advertised, along with the more specific routes. The exception to this rule is through the use of the summary-only command. The "summary-only" keyword suppresses the more specific routes and announces only the summarized route.

NEW QUESTION # 249
Refer to the exhibit.

A network administrator configured an IPv6 access list to allow TCP return frame only, but it is not working as expected. Which changes resolve this issue?

• A. Option A
• B. Option B
• C. Option D
• D. Option C

Answer: D

Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/122_55_se/configuration/guid

NEW QUESTION # 250

Refer to the exhibit. The DHCP client is unable to receive an IP address from the DHCP server RouterB is configured as follows:
Interface fastethernet 0/0
description Client DHCP ID 394482431
Ip address 172 31 11 255 255.255 0
!
ip route 172.16.1.0 255 255 255.0 10.1.1.2
Which command is required on the fastethernet 0/0 interface of RouterB to resolve this issue?

• A. RouterB(config-if)#lp helper-address 172.16.1.2
• B. RouterB(config-if)#lp helper-address 172.31.1.1
• C. RouterBiconfig-ififclp helper-address 255.255 255 255
• D. RouterB(config-if)#lp helper-address 172.16.1.1

Answer: A

NEW QUESTION # 251
While working with software images, an engineer observes that Cisco DNA Center cannot upload its software image directly from the device. Why is the image not uploading?

• A. The software image for the device is in install mode.
• B. The device must be resynced to Cisco DNA Center.
• C. The software image for the device is in bundle mode
• D. The device has lost connectivity to Cisco DNA Center.

Answer: A

Explanation:
Section: Infrastructure Services
Explanation/Reference: https://www.cisco.com/c/en/us/td/docs/cloud-systems-management/network-automation-and- management/dna-center/1-2-10/user_guide/b_cisco_dna_center_ug_1_2_10/ b_dnac_ug_1_2_10_chapter_0100.html

NEW QUESTION # 252

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?

• A. 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.
• B. 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.
• C. 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.
• D. 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

Answer: C

NEW QUESTION # 253
Refer to the exhibit.

What is the result of applying this configuration?

• A. The router cannot form BGP neighborships with any device that is matched by the access list named
  "BGP".
• B. The router can form BGP neighborships with any other device.
• C. The router cannot form BGP neighborships with any other device.
• D. The router can form BGP neighborships with any device that is matched by the access list named
  "BGP".

Answer: B

NEW QUESTION # 254
Refer to the exhibit.

Refer to the exhibit. An engineer configured NetFlow on R1, but the flows do not reach the NMS server from R1. Which configuration resolves this Issue?

• A. Option C
• B. Option A
• C. Option B
• D. Option D

Answer: C

NEW QUESTION # 255
Refer to the exhibit.

R1 test its directly connected EIGRP peer 172.16.33.2 (SW1). Which configuration resolves the issue1?

• A. key chain EIGRP
  key 1
  key-string Cisco
  !
  interface Gigabit Ethernet 2
  IP authentication mode elgrp 88 md5
  IP authentication key-chain elgrp 88 EIGRP
• B. key chain EIGRP
  key1
  key-string Cisco
  !
  interface Gigabit Ethernet 2
  IP authentication mode eigrp 88 md5
  IP authentication key-chain elgrp 88 Cisco
• C. key chain EIGRP
  key1
  key-string Cisco
  !
  interface Gigabit Ethernet 2.10
  IP authentication mode eigrp 88 md5
  IP authentication key-chain eigrp 88 Cisco
• D. key chain EIGRP
  key 1
  key-string Cisco
  !
  interface Gigabit Ethernet 2.10
  IP authentication mode elgrp 88 md5
  IP authentication key-chain eigrp 88 EIGRP

Answer: C

NEW QUESTION # 256
Refer to the exhibit.

After a security audit, the administrator implemented an ACL in the route reflector. The RR became unreachable from any router in the network. Which two actions resolve the issue? (Choose two.)

• A. Configure a link-local address on the Ethernet0/1 interface.
• B. Permit ICMPv6 neighbor discovery traffic in the ACL.
• C. Enable the ND proxy feature on the default gateway.
• D. Change the next hop of the default route to the link-local address of the default gateway.
• E. Remove the ACL entry 80.

Answer: B,E

NEW QUESTION # 257
Refer to the exhibit.

Which configuration configures a policy on R1 to forward any traffic that is sourced from the 192.168.130.0/24 network to R2?

• A. Option C
• B. Option A
• C. Option B
• D. Option D

Answer: D

NEW QUESTION # 258
Refer to the exhibit.

A loop occurs between R1, R2, and R3 while EIGRP is run with poison reverse enabled. Which action prevents the loop between R1, R2, and R3?

• A. Configure route tagging
• B. Configure route filtering
• C. Configure R2 as stub receive-only
• D. Enable split horizon

Answer: D

NEW QUESTION # 259
......

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