ENCOR v1.1 is now a historical version of the Cisco 350-401 Enterprise Core exam. Cisco introduced that revision in September 2023, and the next minor update, v1.2, took effect on March 19, 2026. Candidates preparing today should use the current Cisco topic list, but the v1.1 blueprint remains useful for understanding why older courses devote time to wireless engineering and certain switching or access-control details that are no longer separately examined in the core.
The distinction is more than a version number. Training for a professional certification should tell a learner which concepts are required by the current exam and which are valuable background or responsibilities belonging to a different credential. A v1.1 textbook can still explain OSPF, EtherChannel, segmentation and programmability very well. It becomes misleading when a candidate treats every old objective as mandatory for the exam Cisco actually delivers in 2026.
Where ENCOR v1.1 fitted into the Cisco certification structure
The 350-401 examination was the shared enterprise core for CCNP Enterprise and a written qualification route into CCIE Enterprise Infrastructure or Enterprise Wireless. Passing it also earned the Cisco Certified Specialist – Enterprise Core credential. These relationships made ENCOR broader than a single routing or campus design test. It was intended to assess the technologies that connect enterprise architectures with day-to-day network operations.
The exam duration was 120 minutes, and the major learning areas encompassed Architecture, Virtualization, Infrastructure, Network Assurance, Security and Automation. The outline mixed descriptive knowledge with configuration, verification, troubleshooting and interpretation. A learner who could name a routing protocol without reading its operational state was not meeting the spirit of those tasks.
Cisco now delivers Cisco 350-401 ENCOR under v1.2. The old topic inventory documented here cannot define that assessment’s requirements; the current ENCOR v1.2 scope provides the relevant technical and exam-version distinctions.
Architecture included enterprise wireless design
One of the most visible features of v1.1 was that Architecture explicitly included wireless deployment models, WLAN location services and client density. Those objectives required network candidates to recognize centralized, controller-based, cloud and remote-branch wireless patterns alongside wired campus designs. They also asked learners to think about how client concentration affected deployment choices.
That wireless scope did not make the rest of Architecture secondary. High availability, first-hop redundancy, software-defined WAN and campus fabrics connected the design of networks to their failure behavior and policy boundaries. The practical lesson was that network architecture must account for both where traffic should flow and how service continues when components are lost.
With v1.2, Cisco removed the specific wireless-design task group from ENCOR. A current candidate should not infer that WLAN work has disappeared from enterprise networking; it belongs to dedicated wireless learning and certification routes. That separation also explains why some training materials created for the old core still include valuable wireless demonstrations even though Cisco now allows learners to skip them for the v1.2 assessment.
Infrastructure remained grounded in routing and switching
The v1.1 Infrastructure scope required operational understanding of 802.1Q trunks, EtherChannels, spanning-tree variants, OSPF and routing concepts, among other enterprise services. Candidates needed to tell the difference between an unexpected Layer 2 forwarding state, an OSPF neighbor problem and a missing route produced by filtering or area design. Merely remembering commands could not identify the first useful test in a mixed failure scenario.
Layer 2 protection mechanisms also mattered. BPDU guard and root guard, for example, have different roles in maintaining the intended spanning-tree topology. A change that restores a link at the expense of disabling a protective control may create a bigger network risk. Those trade-offs illustrate why configuration syntax must be learned with failure modes and decision boundaries.
The older outline also carried an explicit standalone task for hardware and software switching mechanisms such as CEF, CAM, TCAM, FIB, RIB and adjacency tables. Cisco removed that task as a separately stated v1.2 objective. Engineers still benefit from knowing how routing decisions become forwarding behavior, but a current ENCOR study plan should prioritize what the new task list actually specifies.
A related older objective described wireless infrastructure and client-connectivity troubleshooting, including radio concepts, access point roles, discovery, roaming and wireless segmentation. That dedicated wireless group also left the v1.2 core. It should not be combined with the still-current wired trunk, EtherChannel, routing and network-assurance work as though they had all been removed together.
Virtualization and programmable operations connected the domains
Virtualization provided an important bridge between physical networking and modern overlay architectures. VRFs allowed separated routing contexts, GRE and IPsec enabled logical paths, and LISP or VXLAN helped explain how software-defined fabrics extend network segmentation and endpoint reachability beyond a simple physical topology.
The central idea remains useful in either version: underlay reachability and overlay policy are related but distinct conditions. A controller can show an intended path while a broken underlay prevents packets from reaching the edge. A successful tunnel establishment can coexist with the wrong policy. Engineers need to know which state and evidence answer each question.
Network Assurance complemented that model. Ping, traceroute, syslog, SNMP, packet mirroring and flow visibility help establish whether the implemented network matches expectations. Automation introduced structured representation of that state through Python, JSON, YANG and network APIs, together with device-local capabilities such as EEM. None of these concepts makes routing or switching irrelevant; the interfaces depend on those technologies to produce observable results.
The current relationship among ENCOR’s six domains remains a stronger conceptual learning tool than treating v1.1 or v1.2 as six disconnected checklists.
Security once listed wireless authentication as a core task
The v1.1 Security scope extended from device administration, AAA, ACLs and Control Plane Policing to broader enterprise-security design. Wireless authentication configuration appeared explicitly, covering 802.1X, WebAuth, preshared-key methods and the EAPOL handshake. The related network-access-control task referenced 802.1X, MAC Authentication Bypass and WebAuth.
Cisco’s 2026 release notes identify both the wireless-security group and the specific access-control subtask as removed from ENCOR v1.2. That is a change in the exam’s explicit assessment scope, not a declaration that enterprise networks should stop enforcing identity and access policy. AAA, filtering, control-plane protection and other current security objectives still matter.
This is an example of why versioned study notes should record the objective number or source date. An older course may accurately describe how 802.1X or wireless roaming works while wrongly presenting it as a required 350-401 v1.2 topic. The technology fact and the exam relevance are separate claims.
What changed on March 19, 2026
Cisco’s official minor-update notes record the removal of wireless network design, wireless infrastructure, wireless-security configuration, the old dedicated switching-mechanisms item and the specific network-access-control subtask. The update also removed some finer QoS subitems. The remaining wired-enterprise, infrastructure, virtualization, assurance, security and automation content continued to form the core of the exam.
Product names were modernized as well. Cisco SD-WAN became Cisco Catalyst SD-WAN; Cisco DNA Center became Cisco Catalyst Center. In Catalyst SD-WAN, older controller names such as vBond, vManage and vSmart were updated to Validator, Manager and Controller terminology. A learner should understand what those components do rather than assume that a name change created an entirely different architecture.
The broader CCNP Enterprise portfolio also received changes across concentration exams. Not every new topic in those release notes belonged to ENCOR itself. For instance, a multicast design change recorded under the 300-420 design concentration should not be presented automatically as a newly added 350-401 core requirement. Always read the exam number printed above a change list.
A simple comparison therefore distinguishes three categories: unchanged current concepts, formerly specified tasks that are now background, and concepts or new names belonging to a separate concentration. This prevents both errors—discarding useful wired knowledge because the version changed, and spending weeks on removed objectives because an old course still presents them as current.
How to reuse an older ENCOR course intelligently
Begin with the current official topic list and compare the course’s chapter map. Preserve lessons that develop still-current OSPF, eBGP, VLAN, EtherChannel, VRF, tunnel, assurance, security and automation knowledge. Relabel historical wireless units and other removed standalone tasks as optional enrichment. For renamed products, annotate the current term while retaining the technical explanation when its underlying role remains the same.
Then test applied knowledge. Set up a small routed and switched topology, introduce a trunk mismatch, diagnose an OSPF adjacency problem, query network state through an API or explain why an overlay cannot recover from a missing underlay route. Current Cisco ENCOR troubleshooting depends on this ability to use evidence, not simply to repeat the topic labels from a particular edition.
Historical material can also support professional practice outside the exam. A network engineer may still be responsible for wireless access, switch forwarding internals or advanced campus security. It is legitimate to learn those topics because the job requires them. The important editorial distinction is to state the real reason for studying them and not imply that Cisco still lists every older v1.1 item as a current core objective.
The useful historical takeaway
ENCOR v1.1 documents what Cisco considered part of a broad enterprise core during the 2023–2026 period. The 2026 v1.2 revision narrowed its wireless and selected legacy tasks while retaining the central routing, switching, architecture, assurance, security and automation responsibilities. Readers researching that history should keep the old scope dated and refer present-day exam decisions to Cisco’s active release notes and official 350-401 topics.