Prepare for the Cisco 350-401 ENCOR exam with an overview of the certification, exam domains, study strategies, a preparation plan, practice questions, and FAQs.
Enterprise networks are the foundation of modern business operations. Organizations rely on secure, scalable, and highly available networks to connect users, applications, cloud services, and data centers.
The Cisco 350-401 ENCOR (Implementing Cisco Enterprise Network Core Technologies) exam validates your knowledge of core enterprise networking technologies, including routing, switching, wireless, security, virtualization, network assurance, and automation.
This guide from Clearcatnet.com explains the exam structure, key topics, preparation strategies, and practice questions to help you plan your certification journey.
What Is Cisco 350-401 ENCOR?
The 350-401 ENCOR exam is Cisco’s enterprise networking core exam. Passing it earns the Cisco Certified Specialist – Enterprise Core certification and satisfies the core exam requirement for the CCNP Enterprise and CCIE Enterprise Infrastructure certification paths.
The exam focuses on implementing and operating enterprise network technologies, including:
- IPv4 and IPv6 architecture
- Enterprise routing and switching
- Network virtualization
- Cisco SD-WAN and SD-Access
- Network security
- Network assurance and troubleshooting
- Automation and programmability
Cisco 350-401 ENCOR Exam Overview
| Exam Feature | Details |
|---|
| Exam Name | Implementing Cisco Enterprise Network Core Technologies |
| Exam Code | 350-401 ENCOR |
| Certification Level | Professional core exam |
| Exam Duration | 120 minutes |
| Exam Format | Cisco proctored exam; question types may vary |
| Exam Fee | USD 400, or Cisco Learning Credits |
| Languages | English and Japanese |
| Prerequisites | No formal prerequisites |
| Certification Outcome | Cisco Certified Specialist – Enterprise Core |
| Certification Path | CCNP Enterprise and CCIE Enterprise Infrastructure core requirement |
Cisco may update exam topics and delivery details. Review the official exam page before scheduling your exam.
350-401 ENCOR Exam Domains and Weightings
The current ENCOR v1.2 blueprint contains six domains.
| Exam Domain | Weight |
|---|
| Architecture | 15% |
| Virtualization | 10% |
| Infrastructure | 30% |
| Network Assurance | 10% |
| Security | 20% |
| Automation and Artificial Intelligence | 15% |
Preparation tip: Infrastructure is the largest domain, so dedicate significant time to Layer 2 technologies, routing protocols, network services, and infrastructure troubleshooting. Security and automation are also important parts of the exam.
Detailed 350-401 ENCOR Syllabus
Domain 1: Architecture — 15%
This domain focuses on enterprise network design principles and modern network architectures.
Key topics include:
- Two-tier and three-tier enterprise network designs
- High availability and redundancy
- First Hop Redundancy Protocols (FHRPs)
- Stateful Switchover (SSO)
- Cisco Catalyst SD-WAN architecture
- Cisco SD-Access architecture
- Quality of Service (QoS)
- Enterprise network design considerations
Important concepts: Campus design, control plane, data plane, overlay networks, QoS classification, and high availability.
Domain 2: Virtualization — 10%
This domain validates your understanding of virtualization technologies used in enterprise networks.
Key topics include:
- Type 1 and Type 2 hypervisors
- Virtual machines and virtual switching
- Virtual Routing and Forwarding (VRF)
- GRE and IPsec tunnels
- Network virtualization concepts
- LISP
- VXLAN
Important concepts: Logical network separation, tunnel encapsulation, overlay networks, and virtualized infrastructure.
Domain 3: Infrastructure — 30%
This is the largest exam domain and covers core enterprise networking implementation.
Key topics include:
- VLANs and trunking
- Spanning Tree Protocol and Rapid PVST+
- Multiple Spanning Tree Protocol
- EtherChannel and LACP
- OSPF and EIGRP
- External BGP fundamentals
- Routing and path selection
- First Hop Redundancy Protocols
- Network Address Translation (NAT)
- Multicast fundamentals
- Network time protocols
- Wireless infrastructure concepts
- Network services and connectivity
Important technologies: VLANs, STP, EtherChannel, OSPF, EIGRP, BGP, HSRP, VRRP, NAT, NTP, and multicast.
Domain 4: Network Assurance — 10%
This domain focuses on monitoring, analyzing, and troubleshooting enterprise networks.
Key topics include:
- Troubleshooting tools and methodologies
- Ping and traceroute
- Debugging and packet analysis
- SPAN, RSPAN, and ERSPAN
- Flexible NetFlow
- Cisco Catalyst Center assurance
- Network telemetry
- IP SLA
- NETCONF and RESTCONF fundamentals
Important concepts: Network visibility, performance monitoring, traffic analysis, and proactive troubleshooting.
Domain 5: Security — 20%
This domain validates your ability to implement security controls in enterprise networks.
Key topics include:
- Device access control
- Authentication, Authorization, and Accounting (AAA)
- RADIUS and TACACS+
- Access Control Lists (ACLs)
- Control Plane Policing (CoPP)
- Layer 2 security
- DHCP snooping
- Dynamic ARP Inspection
- 802.1X authentication
- Network security architecture
- API security fundamentals
Important concepts: Least privilege, secure device management, network access control, and protection of the control plane.
Domain 6: Automation and Artificial Intelligence — 15%
This domain focuses on network programmability and automation.
Key topics include:
- Python fundamentals
- JSON data structures
- REST APIs
- HTTP methods and response codes
- YANG data models
- NETCONF and RESTCONF
- Cisco Catalyst Center APIs
- Cisco Catalyst SD-WAN Manager APIs
- Embedded Event Manager (EEM)
- Agent-based and agentless automation tools
- AI-related concepts in network operations
Important concepts: API requests, structured data, configuration automation, programmability, and network management.
How to Prepare for the Cisco 350-401 ENCOR Exam
1. Review the Official Exam Blueprint
Start with Cisco’s official exam topics document. Break down each domain into smaller objectives and track your progress.
Focus on understanding how technologies work, how they are configured, and how they are verified or troubleshot.
2. Strengthen Routing and Switching Fundamentals
Review VLANs, trunking, STP, EtherChannel, OSPF, EIGRP, BGP, and first-hop redundancy.
Practice identifying common configuration errors and interpreting routing tables, interface states, and protocol behavior.
3. Practice in a Lab Environment
Hands-on practice is strongly recommended. Use Cisco equipment, Cisco Modeling Labs, or another authorized lab environment to practice:
- VLAN and trunk configuration
- STP and EtherChannel
- OSPF and BGP
- HSRP and VRRP
- NAT and ACLs
- VRF and tunneling
- Network troubleshooting
4. Understand Network Virtualization
Study the purpose and operation of VRF, GRE, IPsec, LISP, VXLAN, SD-WAN, and SD-Access.
Focus on how these technologies support segmentation, connectivity, and scalable network design.
5. Review Security Concepts
Understand AAA, RADIUS, TACACS+, ACLs, CoPP, DHCP snooping, Dynamic ARP Inspection, and 802.1X.
For each security feature, identify the threat it addresses and the network layer or component it protects.
6. Learn Automation Fundamentals
You do not need to become a software developer, but you should understand basic Python, JSON, REST APIs, NETCONF, RESTCONF, and YANG.
Practice reading API requests and responses and identifying how automation can reduce repetitive network administration tasks.
7. Take Practice Tests
Use practice questions to identify weak areas and improve exam readiness.
After each practice test:
- Review incorrect answers
- Revisit the related exam objective
- Practice the technology in a lab
- Retest your understanding
Four-Week 350-401 ENCOR Study Plan
| Week | Focus Areas | Recommended Activities |
|---|
| Week 1 | Architecture, virtualization, and Layer 2 infrastructure | Review network design, VRF, VLANs, STP, and EtherChannel; practice configurations |
| Week 2 | Routing and infrastructure | Practice OSPF, EIGRP, BGP, NAT, FHRPs, and network services |
| Week 3 | Security and network assurance | Review AAA, ACLs, CoPP, monitoring, NetFlow, SPAN, and troubleshooting |
| Week 4 | Automation and revision | Practice Python, JSON, APIs, NETCONF, RESTCONF, and complete timed practice tests |
Candidates who are new to enterprise networking may benefit from a longer preparation schedule with additional lab time.
Five Cisco 350-401 ENCOR Practice Questions
These original questions are designed to reinforce exam concepts. They are not actual Cisco exam questions.
Question 1: Spanning Tree Protocol
Two switches are connected using multiple redundant Layer 2 links. The network administrator wants to bundle the links into a single logical connection to improve bandwidth and provide link redundancy.
Which technology should be configured?
A. HSRP
B. EtherChannel
C. OSPF
D. VRF
Correct Answer: B. EtherChannel
Explanation: EtherChannel combines multiple physical links into one logical link. It provides increased bandwidth and link redundancy while allowing Spanning Tree Protocol to treat the bundle as a single connection.
Question 2: Routing Protocol
A company uses OSPF in its enterprise network. The administrator wants to reduce routing overhead and improve scalability by organizing the network into multiple areas.
Which OSPF design principle should be followed?
A. All areas should connect directly to Area 0
B. Area 0 should be removed
C. Every router must use a different autonomous system number
D. OSPF should be replaced with NAT
Correct Answer: A. All areas should connect directly to Area 0
Explanation: OSPF uses Area 0 as its backbone area. In a standard multi-area design, other areas connect to Area 0 to support inter-area routing.
Question 3: Network Security
A network administrator wants to restrict unauthorized devices from connecting to corporate switch ports. The organization uses centralized authentication.
Which technology is most appropriate?
A. 802.1X
B. NTP
C. NetFlow
D. HSRP
Correct Answer: A. 802.1X
Explanation: 802.1X provides port-based network access control. It can work with a centralized authentication server to authenticate users or devices before granting network access.
Question 4: Network Assurance
An administrator needs to analyze traffic passing through a switch port without interrupting normal forwarding. Which technology is most appropriate?
A. HSRP
B. SPAN
C. VRF
D. BGP
Correct Answer: B. SPAN
Explanation: Switched Port Analyzer (SPAN) mirrors traffic from selected source ports or VLANs to a destination monitoring port, allowing traffic analysis without disrupting normal forwarding.
Question 5: Network Automation
A network engineer wants to retrieve structured information from a network device using a model-driven interface. Which protocol is commonly used with YANG data models to retrieve or configure device data?
A. FTP
B. NETCONF
C. ARP
D. TFTP
Correct Answer: B. NETCONF
Explanation: NETCONF is a network management protocol that can use YANG data models to retrieve and configure structured device information. RESTCONF is another model-driven management option.
Frequently Asked Questions
What is Cisco 350-401 ENCOR?
350-401 ENCOR is Cisco’s enterprise networking core exam. It validates knowledge of enterprise architecture, routing, switching, virtualization, security, network assurance, and automation.
What certification do I earn by passing ENCOR?
Passing the exam earns the Cisco Certified Specialist – Enterprise Core certification. It also satisfies the core exam requirement for the CCNP Enterprise and CCIE Enterprise Infrastructure paths.
How long is the 350-401 ENCOR exam?
The exam duration is 120 minutes.
Are there prerequisites for ENCOR?
Cisco lists no formal prerequisites for the exam. However, practical knowledge of networking fundamentals and enterprise routing and switching is recommended.
Is hands-on practice important?
Yes. Hands-on labs help you understand configuration, verification, troubleshooting, and the behavior of enterprise networking technologies.
What should I study first?
Begin with the official exam blueprint and strengthen your routing and switching fundamentals. Then progress through virtualization, security, assurance, and automation.
How long should I prepare?
Candidates with strong networking experience may prepare in four weeks. Candidates who need more lab practice may benefit from six to eight weeks or longer.
Conclusion
The Cisco 350-401 ENCOR exam is an important milestone for networking professionals pursuing CCNP Enterprise or CCIE Enterprise Infrastructure certification paths.
Successful preparation requires a balance of conceptual knowledge, configuration practice, troubleshooting skills, and familiarity with modern network automation.
Use the official exam blueprint, practice regularly in a lab environment, and focus on understanding how enterprise networking technologies work together.
Start your 350-401 ENCOR preparation with Clearcatnet.com. Strengthen your networking skills, practice with confidence, and take the next step in your IT career.
Prepare for the Cisco 350-401 ENCOR exam with focused study resources and exam-oriented practice from Clearcatnet.com. Strengthen your networking knowledge, build confidence, and take the next step toward your Cisco certification.
Written By:Tannu Singh
Published on: 02/11/2026
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