300-410 — Implementing Cisco Enterprise Advanced Routing and Services (ENARSI)
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Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) (300-410) Practice Questions

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159 questions
June 19, 2026 updated
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Sample Questions (16 of 159 shown)

Q1
Which routing protocol has the lowest default administrative distance for routes learned dynamically on a Cisco IOS router?
  1. OSPF (110)
  2. EIGRP internal (90)
  3. iBGP (200)
  4. RIP (120)
✓ Correct Answer: B
EIGRP internal routes have AD 90, lower than OSPF (110), RIP (120), iBGP (200), and external EIGRP (170). When a destination is learned from multiple protocols, the route with lowest AD is installed.
Q2
An engineer wants to change the AD of a single OSPF external route to 130. Which config achieves this?
  1. Under router ospf 1: distance 130
  2. Under router ospf 1: distance 130 0.0.0.0 255.255.255.255 1 (ACL 1 permits the prefix)
  3. Under router eigrp 1: distance 90
  4. Under interface: ip ospf cost 130
✓ Correct Answer: B
The 'distance ad source-ip wildcard acl-number' command under OSPF selectively changes AD per prefix using an ACL. A bare 'distance 130' would change every OSPF route.
Q3
Which IOS command applies a route-map SET-MED to outbound BGP advertisements toward neighbor 10.1.1.2?
  1. neighbor 10.1.1.2 route-map SET-MED in
  2. neighbor 10.1.1.2 route-map SET-MED out
  3. ip route-map SET-MED 10.1.1.2 out
  4. redistribute route-map SET-MED 10.1.1.2
✓ Correct Answer: B
Inside BGP config, 'neighbor ip route-map name out' applies the route-map to updates sent to that neighbor. 'in' would filter/modify received routes.
Q4
A route-map clause with no match statement and a permit action behaves how?
  1. Denies all routes
  2. Permits all routes that reach the clause
  3. Is rejected as invalid
  4. Acts the same as deny any
✓ Correct Answer: B
A permit clause with no match matches every route and applies any set actions. It is commonly the final catch-all after earlier filter clauses.
Q5
Which command summarizes EIGRP routes 10.1.0.0/24 through 10.1.3.0/24 outbound on an interface?
  1. ip summary-address eigrp 100 10.1.0.0 255.255.252.0
  2. summary-address eigrp 100 10.1.0.0/22
  3. ip summary-address 10.1.0.0 0.0.3.255 eigrp 100
  4. router eigrp 100 / network 10.1.0.0 0.0.3.255 summary
✓ Correct Answer: A
EIGRP manual summarization uses 'ip summary-address eigrp AS network mask' under the interface. The four /24s combine into 10.1.0.0/22 (mask 255.255.252.0).
Q6
What is the purpose of the Null0 route EIGRP installs when manual summarization is configured?
  1. Backup path for when summary fails
  2. Prevents routing loops by dropping traffic for unknown subnets within the summary
  3. Advertises the summary to BGP neighbors
  4. Improves convergence by feeding into the topology table
✓ Correct Answer: B
EIGRP installs a discard route to Null0 for the summary block. Packets for subnets within the summary that the router doesn't know are dropped instead of potentially looping.
Q7
Which command enables policy-based routing on an interface?
  1. ip route-map PBR
  2. ip policy route-map PBR
  3. policy route-map PBR in
  4. ip policy-based-routing PBR
✓ Correct Answer: B
PBR is enabled on the ingress interface with 'ip policy route-map name'. The router evaluates the route-map for incoming packets before normal destination lookup.
Q8
Which two commands create a VRF named CUSTOMER and place GigabitEthernet0/1 into it using legacy VRF-Lite syntax?
  1. ip vrf CUSTOMER and ip vrf forwarding CUSTOMER
  2. vrf definition CUSTOMER and ip vrf CUSTOMER
  3. vrf CUSTOMER and vrf member CUSTOMER
  4. ip vrf CUSTOMER and vrf forwarding CUSTOMER
✓ Correct Answer: A
Legacy IPv4 VRF-Lite uses 'ip vrf name' globally then 'ip vrf forwarding name' on the interface. Newer syntax uses 'vrf definition name' and 'vrf forwarding name'.
Q9
Which EIGRP named mode configuration would you use to configure EIGRP for both IPv4 and IPv6?
  1. address-family ipv4 and address-family ipv6 under the EIGRP named mode config
  2. router eigrp AS for IPv4 and ipv6 router eigrp AS for IPv6
  3. eigrp ipv4 and eigrp ipv6 under interface
  4. network ipv4 and network ipv6
✓ Correct Answer: A
Named mode EIGRP uses 'router eigrp NAME' then 'address-family ipv4|ipv6 autonomous-system AS' sub-configs. This allows a single EIGRP instance to serve both address families.
Q10
In OSPF, what LSA type is generated by an ASBR to advertise external routes?
  1. Type 3 (Summary LSA)
  2. Type 4 (ASBR Summary LSA)
  3. Type 5 (AS External LSA)
  4. Type 7 (NSSA External LSA)
✓ Correct Answer: C
OSPF Type 5 LSAs are generated by ASBRs to advertise external routes into the OSPF domain. They are flooded throughout the entire OSPF domain except stub areas and NSSAs.
Q11
Which OSPF area type blocks Type 3, 4, and 5 LSAs and injects a default route?
  1. Stub area
  2. Totally stubby area
  3. NSSA
  4. Standard area
✓ Correct Answer: B
OSPF totally stubby area (Cisco proprietary) blocks Type 3/4/5 LSAs and injects a default Type 3 LSA. Only Type 1 and 2 LSAs are allowed.
Q12
What is the default OSPF cost for a 10 Gbps link?
  1. 1
  2. 10
  3. 100
  4. 1000
✓ Correct Answer: A
OSPF cost = reference-bandwidth / interface-bandwidth. With default reference-bandwidth of 100 Mbps: 100/10000 = 0.01, but minimum cost is 1.
Q13
Which BGP attribute is Cisco-proprietary and checked first in the path selection algorithm?
  1. Weight
  2. Local Preference
  3. AS Path
  4. MED
✓ Correct Answer: A
Weight is a Cisco-proprietary BGP attribute checked first. It is locally significant only to the router and higher weight is preferred. Default is 0 for learned routes, 32768 for locally originated.
Q14
Which BGP well-known mandatory attribute is used for loop prevention?
  1. NEXT_HOP
  2. AS_PATH
  3. ORIGIN
  4. LOCAL_PREF
✓ Correct Answer: B
AS_PATH is well-known mandatory. BGP routers reject updates that contain their own AS number in the AS_PATH, preventing routing loops. AS_PATH length is also used for path selection.
Q15
Which OSPF LSA Type is also known as the Network LSA?
  1. Type 1
  2. Type 2
  3. Type 3
  4. Type 5
✓ Correct Answer: B
Type 2 (Network LSA) is generated by the DR on multi-access networks. It lists all routers attached to that segment including the DR itself.
Q16
In BGP, what is the purpose of the Local Preference attribute?
  1. Influences outbound traffic from the AS
  2. Prevents routing loops
  3. Sets the next-hop address
  4. Defines the route origin
✓ Correct Answer: A
Local Preference indicates the preferred path for outbound traffic from the local AS. Higher value is preferred. It is exchanged between iBGP peers only.

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Exam overview

The Cisco Implementing Cisco Enterprise Advanced Routing and Services (300-410 ENARSI) exam, administered through Pearson VUE, validates your ability to troubleshoot complex enterprise routing infrastructures across four critical domains. Unlike the broader ENCOR core exam, ENARSI goes deep into heavy implementation and day-two troubleshooting — parsing broken routing tables, fixing faulty protocol redistribution, modifying route map structures, and restoring broken VPN networks via the CLI.

Candidates are expected to possess 3 to 5 years of active engineering experience managing, tuning, and troubleshooting complex enterprise routing infrastructures. While there are no formal prerequisites, a solid command of the core enterprise blueprint (ENCOR 350-401) is heavily encouraged as the foundational prerequisite. The exam is ideal for senior network engineers, CCNP Enterprise candidates, and routing specialists seeking to validate advanced enterprise routing and services expertise.

The 300-410 blueprint is organized into four weighted domains, with the heaviest emphasis on Layer 3 Technologies (35%) and Infrastructure Services (25%). Key technical concepts include troubleshooting EIGRP classic/named mode and unequal cost load balancing, OSPFv2/v3 neighbor adjacencies across multiple area types (backbone, stub, NSSA, totally stub) with virtual links, BGP path manipulation and route reflector architecture, configuring DMVPN single hub architectures with GRE/mGRE and NHRP, implementing IOS AAA with TACACS+/RADIUS, troubleshooting Control Plane Policing (CoPP) for Telnet, SSH, HTTP(S), and SNMP, and isolating performance metrics using IP SLA jitter with tracking objects, Flexible NetFlow, and Cisco Catalyst Center Assurance. Because the exam enforces a strict No-Backtracking policy, candidates must carefully review each answer — including performance-based lab work — before proceeding.

For candidates preparing for the 300-410 exam, our practice materials cover all four weighted domains in the same proportions as the real test — from EIGRP/OSPF/BGP redistribution troubleshooting through DMVPN NHRP phase verification and IOS AAA configuration. Each online practice question includes a detailed answer explanation that walks through the CLI troubleshooting reasoning or protocol behavior analysis, while the downloadable PDF packages the same question bank for offline review during commutes or lab sessions without stable internet.

Ready to test your advanced routing and troubleshooting knowledge? Start with our free 300-410 practice test online, or download the PDF to study at your own pace.

Official Exam Domains & Weighting

To successfully pass the 300-410 exam, candidates must master the following core domains:
  • Domain1: Layer 3 Technologies (35%)
Covers troubleshooting administrative distance across all routing protocols; troubleshooting route maps (attributes, tagging, filtering); troubleshooting loop prevention mechanisms (filtering, tagging, split horizon, route poisoning); advanced routing protocol redistribution; manual and auto-summarization; configuring and verifying Policy-Based Routing (PBR) and VRF-Lite; describing Bidirectional Forwarding Detection (BFD); troubleshooting EIGRP (classic/named mode, address families IPv4/IPv6, stubs, equal/unequal cost load balancing); troubleshooting OSPFv2/v3 (neighbor adjacencies, network types, area types including backbone, stub, NSSA, totally stub, virtual links, path preference); troubleshooting BGP (IBGP/EBGP, unicast, next-hop, multihop, 4-byte AS, route reflectors, path manipulation attributes).
  • Domain2: VPN Technologies (20%)
Focuses on describing Multiprotocol Label Switching (MPLS) operational layers (LSR, LDP, label switching, LSP); describing MPLS Layer 3 VPN architectural paradigms; configuring and verifying Dynamic Multipoint VPN (DMVPN single hub architectures using GRE/mGRE, NHRP, IPsec, dynamic neighbor mappings, and spoke-to-spoke flows).
  • Domain3: Infrastructure Security (20%)
Tests troubleshooting infrastructure access controls via IOS AAA (TACACS+, RADIUS, local databases); troubleshooting router protection features including IPv4 ACLs (Standard, Extended, Time-Based) and IPv6 traffic filters; verifying Unicast Reverse Path Forwarding (uRPF); troubleshooting Control Plane Policing (CoPP) for Telnet, SSH, HTTP(S), SNMP, and routing engine packets; describing IPv6 First Hop Security features (RA Guard, DHCP Guard, binding tables, ND inspection/snooping, Source Guard).
  • Domain4: Infrastructure Services (25%)
Covers troubleshooting device administrative management (Console, VTY, SSH, Telnet, SCP, FTP/TFTP); troubleshooting SNMP (v2c, v3); comprehensive network logging diagnostics (Syslog, conditional debugs, timestamps); troubleshooting IPv4/IPv6 DHCP (Client, IOS Server, Relay Agent, custom DHCP options); isolating performance metrics using IP SLA (jitter, tracking objects, delay, structural connectivity); troubleshooting NetFlow (v9, Flexible NetFlow, IPFIX); correlating anomalies and running root-cause analysis via Cisco Catalyst Center Assurance.

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Frequently Asked Questions

While the 350-401 ENCOR core exam focus is split broadly across design, wireless, SD-WAN, and automation frameworks, the 300-410 ENARSI exam goes incredibly deep into heavy implementation and day-two troubleshooting. Expect a dominant percentage of questions to focus on parsing broken routing tables, fixing faulty protocol redistribution, modifying route map structures, and restoring broken VPN networks via the CLI. Our practice question bank reflects this depth, with scenario-based questions that require you to troubleshoot live BGP path manipulation, OSPF virtual link failures, and DMVPN spoke-to-spoke flows.

The rule is absolute. If your 300-410 exam populates a performance-based live-device lab, you must complete all terminal work, validations, and debugging actions within that terminal context before advancing. Once you click "Next," the simulation window closes permanently, and you will not be granted another opportunity to alter your running configs. Our online mock exam simulates this exact behavior — once you submit an answer, you cannot go back, helping you practice the time management skills needed for the real test.

The Specialist certificate remains active for exactly 3 years. To transform this Specialist badge into a full CCNP Enterprise designation, you must pair this concentration exam (300-410) with the core technology exam: 350-401 ENCOR. Both milestones must be reached within a 3-year window of each other. Our PDF question bank includes a certification FAQ section to help you plan your CCNP Enterprise certification path.

If you fail the exam, you must wait 5 calendar days before you are allowed to sit for the exact same exam code again. This mandatory cooling-off period officially starts the day after your testing appointment. Passing candidates are barred from retaking the exact same code within 180 days. Our practice questions help you identify weak domains (such as BGP path manipulation, MPLS L3 VPN architecture, or CoPP troubleshooting) before you sit for the real exam, reducing the likelihood of needing a retake.

Our 300-410 mock exam enforces the same strict No-Backtracking rule as the real Pearson VUE test — once you submit an answer and move to the next question, you cannot return to change it. The mock exam also mirrors the real exam's mix of multiple-choice, drag-and-drop, and performance-based lab scenarios across all four domains, helping you build the time management skills needed to complete 55-65 questions within the 90-minute window. Detailed answer explanations after each question help you learn from protocol troubleshooting mistakes immediately.

Yes, the complete 300-410 question bank is available as a downloadable PDF that mirrors the online practice test content. The PDF is organized by domain (Layer 3 Technologies, VPN Technologies, Infrastructure Security, and Infrastructure Services), making it easy to focus your offline review on specific weak areas such as EIGRP unequal cost load balancing, DMVPN NHRP phase verification, CoPP classification rules, or Flexible NetFlow export configurations. The PDF format is ideal for reviewing CLI command syntax and routing protocol behavior analysis without needing a live internet connection.

The most critical skills for the 300-410 exam include troubleshooting EIGRP classic/named mode with unequal cost load balancing and stub configurations; troubleshooting OSPFv2/v3 neighbor adjacencies across multiple area types with virtual links and path preference; troubleshooting BGP path manipulation using attributes (AS_PATH, MED, Local Preference, Weight) and route reflector architecture; configuring DMVPN single hub with GRE/mGRE, NHRP, and IPsec; implementing IOS AAA with TACACS+/RADIUS and local databases; troubleshooting Control Plane Policing (CoPP) for routing engine packet protection; isolating performance metrics using IP SLA and Flexible NetFlow; and running root-cause analysis via Cisco Catalyst Center Assurance. Our practice questions for all four domains reflect these priorities, with scenario-based questions that test your ability to configure and troubleshoot complex enterprise routing networks.