Implementing Cisco Enterprise Advanced Routing and Services (300-410 ENARSI)
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Exam Code
300-410
Exam Name
Implementing Cisco Enterprise Advanced Routing and Services (300-410 ENARSI)
Questions
630 Questions Answers With Explanation
Update Date
January 15,2026
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Cisco 300-410 Sample Question Answers
Question # 1
The network administrator configured CoPP so that all routing protocol traffic toward the router CPU is limited to 1 mbps. All traffic that exceeds this limit must be dropped. The router is running BGP and OSPF Management traffic for Telnet and SSH must be limited to 500kbps.access-list 100 permit tcp any any eq 179access-list 100 permit tcp any any range 22 23access-list 100 permit ospf any any!class-map CM-ROUTINGmatch access-group 100class-map CM-MGMTmatch access-group 100!policy-map PM-COPPclass CM-ROUTINGpolice 1000000 conform-action transmitclass CM-MGMTpolice 500000 conform-action transmit!control-planeservice-policy output PM-COPPNo traffic is filtering through CoPP,which is resulting in high CPU utilization,which configuration resolves the issue ?
A. no access-list 100access-list 100 permit tcp any any eq 179access-list 100 permit ospf any anyaccess-list 101 Permit tcp any any range 22 23!class-map CM-MGMTno match access-group 100match access-group 101 B. control-planeno service-policy output PM-COPPservice-policy input PM-COPP C. No access-list 100access-list 100 permit tcp any any eq 179access-list 100 permit tcp any any range eq 22access-list 100 permit tcp any any range eq 23access-list 100 permit ospf any any D. no access-list 100access-list 100 permit tcp any any eq 179access-list 100 permit ospf any anyaccess-list 101 Permit tcp any any range 22 23!class-map CM-MGMTno match access-group 100match access-group 101!control-planeno service-policy output PM-COPPservice-policy input PM-COPP
Answer: D
Question # 2
A network administrator is troubleshooting a high utilization issue on the route processor of a router that was reported by NMS The administrator logged into the router to check the control plane policing and observed that the BGP process is dropping a high number of routing packets and causing thousands of routes to recalculate frequently. Which solution resolves this issue?
A. Police the cir for BGP, conform-action transmit, and exceed action transmit. B. Shape the pir for BGP, conform-action set-prec-transmit, and exceed action set-frdetransmit. C. Shape the cir for BGP. conform-action transmit, and exceed action transmit. D. Police the pir for BGP, conform-action set-prec-transmit, and exceed action set-clptransmit.
Answer: D
Explanation:
CIR (Committed Information Rate) is the minimum guaranteed traffic delivered in the network.
PIR (Peak Information Rate) is the top bandwidth point of allowed traffic in a non busy times without any guarantee
Question # 3
What is a function of BFD?
A. peer recovery after a Layer 3 protocol adjacency failure B. peer recovery after a Layer 2 adjacency failure C. failure detection independent of routing protocols and media types D. failure detection dependent on routing protocols and media types
Answer: D
Question # 4
Which method provides failure detection in BFD?
A. short duration, high overhead B. short duration, low overhead C. long duration, high overhead D. long duration, low overhead
Answer: B
Question # 5
Which IPv6 feature enables a device to reject traffic when it is originated from an address
that is not stored in the device binding table?
A. IPv6 Snooping B. IPv6 Source Guard C. IPv6 DAD Proxy D. IPv6 RA Guard
Which feature minimizes DoS attacks on an IPv6 network?
A. IPv6 Binding Security Table B. IPv6 Router Advertisement Guard C. IPv6 Prefix Guard D. IPv6 Destination Guard
Answer: D
Explanation:
The Destination Guard feature helps in minimizing denial-of-service (DoS) attacks. It performs address resolutions only for those addresses that are active on the link, and requires the FHS binding table to be populated with the help of the IPv6 snooping feature.The feature enables the filtering of IPv6 traffic based on the destination address, and blocks the NDP resolution for destination addresses that are not found in the binding table. By default, the policy drops traffic coming for an unknown destination.
A newly installed spoke router is configured for DMVPN with the ip mtu 1400 command.
Which configuration allows the spoke to use fragmentation with the maximum negotiated
TCP MTU over GRE?
A.
ip tcp adjust-mss 1360
crypto ipsec fragmentation after-encryption B.
ip tcp adjust-mtu 1360
crypto ipsec fragmentation after-encryption C.
ip tcp adjust-mss 1360
crypto ipsec fragmentation mtu-discovery D.
ip tcp adjust-mtu 1360
crypto ipsec fragmentation mtu-discovery
What are two characteristics of IPv6 Source Guard? (Choose two.)
A. requires IPv6 snooping on Layer 2 access or trunk ports B. used in service provider deployments to protect DDoS attacks C. requires the user to configure a static binding D. requires that validate prefix be enabled E. recovers missing binding table entries
Answer: D,E
Explanation: IPv6 Source Guard uses the IPv6 First-Hop Security Binding Table to drop traffic from
unknown
sources or bogus IPv6 addresses not in the binding table. The switch also tries to recover
from lost
address information, querying DHCPv6 server or using IPv6 neighbor discovery to verify
the source
IPv6 address after dropping the offending packet(s).
Reference: https://blog.ipspace.net/2013/07/first-hop-ipv6-security-features-in.html
Question # 9
An engineer configured a router with this configuration ip access-hst DENY TELNET
10 deny tcp any any eq 23 log-inputThe router console starts receiving log message :%SEC-6-IPACCESSLOGP: listDENY_TELNET denied tcp 192.168.1.10(1022)(FastEthernet1/0 D508.89gb.003f) -
>192.168.2.20(23), 1 packet"
Which action stops messages on the console while still denying Telnet?
A. Configure a 20 permit ip any any command B. Remove log-Input keyword from the access list. C. Replace log-input keyword with the log keyword in the access list. D. Configure a 20 permit ip any any log-input command.
Answer: B
Question # 10
What must be configured by the network engineer to circumvent AS_PATH prevention
mechanism in IP/VPN Hub and Spoke deployment scenarios?
A. Use allows in and as-override at all Pes. B. Use allowas in and as-override at the PE-Hub. C. Use Allowas-in the PE_Hub D. Use as-override at the PE_Hub
Answer: D
Question # 11
In a DMVPN network, the Spoke1 user observed that the voice traffic is coming to Spoke2
users via the hub router. Which command is required on both spoke routers to
communicate directly to one another?
A. ip nhrp map dynamic B. ip nhrp shortcut C. ip nhrp nhs multicast D. ip nhrp redirect
Answer: B
Question # 12
Which IPv6 first hop security feature controls the traffic necessary for proper discovery of
neighbor device operation and performance?
A. RA Throttling B. Source or Destination Guard C. ND Multicast Suppression D. IPv6 Snooping
Answer: D
Question # 13
What are the two goals of micro BFD sessions? (Choose two.)
A. The high bandwidth member link of a link aggregation group must run BFD B. Run the BFD session with 3x3 ms hello timer C. Continuity for each member link of a link aggregation group must be verified D. Eny member link on a link aggregation group must run BFD E. Each member link of a link aggregation group must run BFD.
A. BFD provides faster updates for any flapping route. B. BFD provides millisecond failure detection C. BFD is deployed without the need to run any routing protocol D. BFD provides better capabilities to maintain the routing table
Answer: B
Question # 15
What is a function of an end device configured with DHCPv6 guard?
A. If it is configured as a server, only prefix assignments are permitted. B. If it is configured as a relay agent, only prefix assignments are permitted. C. If it is configured as a client, messages are switched regardless of the assigned role. D. If it is configured as a client, only DHCP requests are permitted.
Answer: C
Explanation: Explanation
The DHCPv6 Guard feature blocks reply and advertisement messages that come from
unauthorized
DHCP servers and relay agents. Packets are classified into one of the three DHCP type messages. All client messages are
always
switched regardless of device role. DHCP server messages are only processed further if
the device role
is set to server. Further processing of server messages includes DHCP server
advertisements (for
source validation and server preference) and DHCP server replies (for permitted prefixes).
If the device is configured as a DHCP server, all the messages need to be switched,
regardless of the
device role configuration.
Question # 16
What is a characteristic of Layer 3 MPLS VPNs?
A. LSP signaling requires the use of unnumbered IP links for traffic engineering. B. Traffic engineering supports multiple IGP instances C. Traffic engineering capabilities provide QoS and SLAs. D. Authentication is performed by using digital certificates or preshared keys.
An engineer configures PBR on R5 and wants to create a policy that matches traffic
destined toward 10.10.10.0/24 and forward 10.1.1.1. The traffic must also have its IP precedence set to
5.All other trafficshould be forward toward 10.1.1.2 and have its IP precedence set to 0.Which configuration
meets the requirements?
A. access-list 1 permit 10.10.10.0 0.0.0.255
access-list 2 permit any
route-map CCNP permit 10
match ip address 1
set ip next-hop 10.1.1.1
set ip precedence 5
!
route-map CCNP permit 20
match ip address 2
set ip next-hop 10.1.1.2
set ip precedence 0route-map CCNP permit 30 B. access-list 100 permit ip any 10.10.10.0 0.0.0.255
route-map CCNP permit 10
match ip address 100
set ip next-hop 10.1.1.1
set ip precedence 0
!
route-map CCNP permit 20
set ip next-hop 10.1.1.2
set ip precedence 5
!
route-map CCNP permit 30 C. access-list 1 permit 10.10.10.0 0.0.0.255
route-map CCNP permit 10
match ip address 1
set ip next-hop 10.1.1.1
set ip precedence 5
!
route-map CCNP permit 20
set ip next-hop 10.1.1.2
set ip precedence 0 D. access-list 100 permit ip any 10.10.10.0 0.0.0.255
route-map CCNP permit 10
match ip address 100
set ip next-hop 10.1.1.1
set ip precedence 5
!
route-map CCNP permit 20 set ip next-hop 10.1.1.2
set ip precedence 0
Answer: D
Question # 18
Which mechanism must be chosen to optimize the reconvergence time for OSPF at
company location 407173257 that is less CPU-intensive than reducing the hello and dead
timers?
A. BFD B. Dead Peer Detection keepalives C. SSO D. OSPF demand circuit
Answer: A
Question # 19
What is the purpose of the DHCPv6 Guard?
A. It messages between a DHCPv6 server and a DHCPv6 client ( or relay agent). B. It shows that clients of a DHCPv5 server are affected. C. It block DHCPv6 messages from relay agents to a DHCPv6 server. D. It allows DHCPv6 replay and advertisements from (rouge) DHCPv6 servers.
Which table is used to map the packets in an MPLS LSP that exit from the same interface,
via the same next hop, and have the same queuing policies?
A. RIB B. FEC C. LDP D. CEF
Answer: B
Question # 21
What does the MP-BGP OPEN message contain?
A. MPLS labels and the IP address of the router that receives the message B. the version number and the AS number to which the router belongs C. IP routing information and the AS number to which the router belongs D. NLRI, path attributes, and IP addresses of the sending and receiving routers
Answer: B
Question # 22
What is a function of IPv6 Source Guard?
A. It works with address glean or ND to find existing addresses. B. It inspects ND and DHCP packets to build an address binding table. C. It denies traffic from known sources and allocated addresses. D. It notifies the ND protocol to inform hosts if the traffic is denied by it.
Answer: A
Explanation: IPv6 source guard is an interface feature between the populated binding
table and data traffic
filtering. This feature enables the device to deny traffic when it is originated from an
address that is
not stored in the binding table. IPv6 source guard does not inspect ND or DHCP
packets;rather, it
works in conjunction with IPv6 neighbor discovery (ND) inspection or IPv6 address glean,
both of
which detect existing addresses on the link and store them into the binding table.
Question # 23
A customer reports that traffic is not passing on an EIGRP enabled multipoint interface on a
router configured as below:
interface Serial0/0
no ip address
interface Server0/0/0.9 multipoint
ip address 10.1.1.1 255.255.255.248
ip split-horizon eigrp 1
Which action resolves the issue?
A. Enable poison reverse B. Enable split horizon C. Disable poison reverse D. Disable split horizon
Answer: D
Question # 24
How does an MPLS Layer 3 VPN differentiate the IP address space used between each
VPN?
A. by RD B. by address family C. by MP-BGP D. byRT
Answer: A
Question # 25
What are two characteristics of a VRF instance? (Choose two)
A. It is defined by the VPN membership of a customer site attached to a P device. B. Each VRF has a different set of routing and CEF tables. C. AII VRFS share customers routing and CEF tables. D. An interface must be associated to one VRF E. A customer site can be associated to different VRFs.
Answer: B,D
Feedback That Matters: Reviews of Our Cisco 300-410 Dumps
Horácio BeltrãoJan 18, 2026
The devil is in the small things. You really have to know your show commands cold. not only what they do, but also how to interpret each output line. The troubleshooting scenarios are no joke. The command cheat sheet from MyCertsHub was my best friend.
Victor CoxJan 17, 2026
Engineers are distinguished from button pushers by this exam. You'll appreciate how well it tests real skills if you use BGP and OSPF every day in a real network. The labs on MyCertsHub prepared me for the worst.
Victor CoxJan 17, 2026
Engineers are distinguished from button pushers by this exam. You'll appreciate how well it tests real skills if you use BGP and OSPF every day in a real network. The labs on MyCertsHub prepared me for the worst.
Connor MillerJan 16, 2026
It had the atmosphere of a Cisco trivia contest. Too many questions about small feature differences and obscure edge-case syntax. I can troubleshoot a network in my sleep, but memorizing every knobs and bolts for the test was frustrating. MyCertsHub had the facts, but I can't say I enjoyed it.
Khalil RobertsJan 16, 2026
The lab scenarios provided by MyCertsHub are spot-on. Finding the missing piece in the puzzle is the main focus of the exam. The multi-hop BGP and redistributions labs on the site were perfect prep. If you can solve those under time pressure, the actual exam feels familiar.
Sirish MasterJan 15, 2026
I've been a network engineer for 8 years. I thought I was an expert. This test made me feel like a fraud. The questions are meant to deceive you. Even the MyCertsHub material, which is good, couldn't prepare me for the mind games.
Horácio Beltrão
Victor Cox
Sirish Master