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Cisco CCNP Enterprise Core 350-401 prep with ARIA

CCNP ENCOR (350-401) is 120 minutes, roughly 100 questions including sims and testlets, a passing score around 825 out of 1000, and the Core exam every CCNP Enterprise candidate must clear. Cisco strongly recommends CCNA first plus three to five years of enterprise networking experience. CCNP Enterprise is not one exam, it is two: the 350-401 Core and one Concentration exam of your choice. I prep you for the Core with an adaptive evaluation, a personalized roadmap, a daily task engine, and a pass guarantee tied to five measurable conditions. Start your free CAT evaluation at claudelab.me/onboarding/select-cert?code=350-401.

TL;DR​

  • 120 minutes, around 100 items, ~825 out of 1000 passing, advanced level, six domains weighted toward Infrastructure at 30 percent.
  • The exam includes sims and testlets, not just multiple choice. Budget time for them and do not skip the configs in the stem.
  • I open with a 15-to-25-question CAT eval that lands a domain-by-domain skill estimate across all six 350-401 domains.
  • Roadmap milestones cluster on Infrastructure, Security, and Automation (combined 65 percent of the exam), with explicit drill on multi-protocol traps that catch most repeat failures.
  • Pass-guarantee eligibility is checked by a database function with five mechanical conditions, not a marketing line.

What the 350-401 ENCOR exam is​

ENCOR is the Core exam in Cisco's CCNP Enterprise track, current as of 2026 with the blueprint refreshed in early 2024. It tests advanced enterprise networking at a depth one tier above CCNA: the same protocols, the corners CCNA waves past, plus SDN, programmability, and wireless deep-dive. Format: 120 minutes, roughly 100 items, blending multiple choice with sim and testlet questions that walk you through configs, topology diagrams, and multi-step scenarios. No separate hands-on lab at this level. The lab requirement only kicks in at CCIE.

CCNP Enterprise is a two-exam credential. You sit 350-401 ENCOR plus one Concentration of your choice: 300-410 ENARSI (routing), 300-415 ENSDWI (SD-WAN), 300-420 ENSLD (design), 300-425 or 300-430 (wireless), 300-435 ENAUTO (automation). Either order works.

The 350-401 blueprint splits into six domains.

DomainWeightWhat it covers
1.0 Architecture15%Enterprise design models, on-prem vs cloud deployment, SD-WAN architecture (vManage, vSmart, vBond, vEdge), Cisco SD-Access fabric, wireless architecture, QoS components and behavior.
2.0 Virtualization10%Device virtualization (hypervisors, virtual machines, containers), data path virtualization (VRF, GRE, IPsec tunnel modes), network virtualization concepts (LISP, VXLAN).
3.0 Infrastructure30%Layer 2 (VLAN, trunking, STP variants, EtherChannel), Layer 3 (advanced OSPF, BGP path selection, eBGP/iBGP), wireless infrastructure (CAPWAP, FlexConnect, RF design), IP services (NAT, NTP, FHRP, multicast basics).
4.0 Network Assurance10%Diagnostic tools (ping, traceroute, debug, conditional debug), NetFlow and Flexible NetFlow, SPAN/RSPAN/ERSPAN, IP SLA, syslog, SNMP, NETCONF and RESTCONF basics.
5.0 Security20%Device access control (AAA, TACACS+, RADIUS), infrastructure security (CoPP, ACLs, TrustSec, MACsec), wireless security, network security design, REST API authentication.
6.0 Automation15%Python with netmiko and NAPALM, Ansible playbook structure for IOS, JSON and YAML data formats, REST API consumption, embedded automation (EEM), Cisco DNA Center APIs.

Infrastructure at 30 percent is the largest single domain by a wide margin, with Security at 20 percent behind it. Together with Automation, those three carry 65 percent of the exam. A roadmap that splits attention evenly across all six wastes the prep window. Compared to CCNA's scope, every domain goes deeper, and the Architecture and Automation content is mostly new material if your last Cisco prep was the legacy track.

How ARIA preps you for it​

ARIA owns your ENCOR prep end to end. Five pieces, each one running every day you stay in the program.

The CAT evaluation. Your first session is a 15-to-25-question adaptive test that converges on your real skill across the six 350-401 domains. Difficulty adjusts after every answer. The test stops at 95 percent confidence or 25 questions, whichever comes first. The output is a domain-by-domain estimate that decides what your roadmap looks like. Read the full CAT explainer for the mechanics.

The personalized roadmap. Because ENCOR is an advanced cert with six broad domains, the generated roadmap typically runs four to five phases instead of three. I sequence them from your weakest domain to your strongest, with two to four milestones each. Novice on Infrastructure or Automation gets the most milestones; proficient on Network Assurance gets the fewest. Infrastructure plus Security plus Automation carry 65 percent of the exam, so the roadmap front-loads them unless your CAT baseline says otherwise. Full structure: the roadmap overview.

The daily task engine. Every time you reopen the app, I pick the next thing to work on, today. One task. Not a list. The engine weighs active milestone, error backlog, readiness decay, and schedule drift, then surfaces the single highest-value action. Roadmap tasks advance milestones; free-play practice sessions improve readiness but do not.

The error backlog with multi-protocol-trap tags. Every wrong answer on an ENCOR item is tagged with the trap pattern, domain, topic, and protocol. ENCOR earns a special tag class because so many questions blend two or three protocols in one stem (an OSPF NSSA question that hinges on a redistribute and a route-map). Tagged items return at 1, 3, 7, and 21 days, retiring only after three correct in a row. The gauntlet drills the same patterns in exam-conditions blocks once readiness clears 80.

The readiness score. A single 0-to-100 number that estimates your probability of passing ENCOR today. It blends coverage, accuracy, and recency, and decays roughly 3 points per day of inactivity past the grace window, which matters more on a long advanced prep. See readiness and decay for the formula. 60 unlocks the demo test, 80 unlocks the gauntlet. Every milestone done, two mock passes, one gauntlet pass, live readiness at 80, and the pass guarantee flips eligible.

Common pitfalls on CCNP ENCOR​

These are the question patterns that quietly cost the most points. Every prep tool names them. Few do anything structural about them.

CCNA tests OSPF as single-area. ENCOR tests it multi-area with corner cases. Cold recall on LSA types 1 through 7 (router, network, summary, ASBR-summary, external, NSSA-external). NSSA areas convert type 7 to type 5 at the ABR; virtual links bridge a discontiguous backbone through a transit area; summarization happens at ABRs (inter-area) or ASBRs (external). Drill the ABR vs ASBR distinction until it is automatic. Half the OSPF questions hinge on it.

2. BGP path selection algorithm order​

BGP picks one path using a strict ordered tiebreaker. Memorize the order: weight (Cisco proprietary, highest wins), local preference (highest wins), locally originated, AS-path length (shortest wins), origin (IGP > EGP > incomplete), MED (lowest wins, same neighboring AS), eBGP over iBGP, IGP metric to next-hop, then router ID and neighbor address. ENCOR loves stems that set up two paths identical on the first three attributes and ask which one wins.

3. MPLS L3VPN basics​

Not deep MPLS, but enough to recognize the architecture. PE (provider edge), CE (customer edge), P (provider core). Route Distinguishers (RDs) make customer prefixes globally unique; Route Targets (RTs) control which VRF imports which prefix. Label distribution rides LDP between PEs. RD vs RT confusion is the classic trap.

4. Wireless deep-dive: CAPWAP, FlexConnect, RF design​

CCNA touches wireless. ENCOR opens it. Know CAPWAP control and data tunnels (UDP 5246 and 5247), local mode (everything tunnels back to the WLC) vs FlexConnect (data switches locally at the AP). RF design covers channel planning (1, 6, 11 on 2.4 GHz; non-overlapping on 5 GHz), RSSI in dBm, SNR in dB, and AP roaming including 802.11r fast transition.

5. SD-WAN architecture: vManage, vSmart, vBond, vEdge​

Cisco SD-WAN (the Viptela acquisition) shows up in Architecture and Infrastructure. Four planes, four roles. vManage is the management plane and GUI; vSmart is the control plane, distributing routing and policy via OMP; vBond is orchestration, authenticating devices into the fabric; vEdge (or cEdge for IOS-XE) is the data plane at the branch or hub. ENCOR will swap them in the answer choices.

6. Virtualization: VRF, GRE, IPsec, LISP, VXLAN​

Small domain (10 percent), but the topics show up across others. VRF gives you multiple routing tables on one device. GRE is a stateless tunnel that carries any payload; IPsec encrypts (transport mode preserves the original IP header, tunnel mode wraps it). LISP separates location from identity. VXLAN encapsulates Layer 2 frames in UDP, with a 24-bit VNI replacing the 12-bit VLAN ID.

7. Automation: Python netmiko and NAPALM, Ansible for IOS​

The Automation domain expects working knowledge, not paste-job recognition. Netmiko opens an SSH session and sends commands; NAPALM abstracts vendor differences with a unified API (get_config, load_merge_candidate, commit_config). Ansible playbooks for IOS use ios_command, ios_config, and ios_facts. Read sample playbooks until the YAML structure is automatic.

8. Advanced security: TrustSec, MACsec, CoPP​

TrustSec uses Security Group Tags (SGTs) to enforce policy independent of IP, with SXP propagating tags between TrustSec-aware and unaware devices. MACsec encrypts at Layer 2 hop-by-hop (802.1AE). CoPP (Control Plane Policing) limits traffic destined to the route processor to protect against control-plane DoS. None of these are CCNA topics.

Common questions​

Do I need CCNA before sitting CCNP ENCOR 350-401?​

Cisco does not enforce CCNA, but the 350-401 blueprint assumes everything CCNA tests is already cold knowledge. Without a current CCNA or three to five years of equivalent enterprise networking work, OSPF, BGP, and switching content lands as new material on top of new material. Most candidates who skip CCNA fail once before going back to fix the gap. The CCNA prep page covers the prerequisite track if you need it.

Which Concentration exam should I pair with 350-401 for the full CCNP Enterprise?​

350-401 ENCOR plus one Concentration exam earns the CCNP Enterprise. Pick by role: 300-410 ENARSI for advanced routing and ISP work, 300-415 ENSDWI for SD-WAN and Viptela shops, 300-420 ENSLD for design tracks, 300-425 ENWLSD or 300-430 ENWLSI for wireless engineers, 300-435 ENAUTO for network automation roles. Most enterprise generalists pick ENARSI or ENSDWI.

How does ARIA cover Cisco-specific configuration without a real CLI?​

ENCOR is a written exam. The sims and testlets test config reading and decision-making, not live typing. ARIA drills the question patterns: identify the missing line, pick the BGP attribute that wins this path selection, choose the OSPF area type for this NSSA boundary. For keyboard time, pair the roadmap with Cisco Modeling Labs, EVE-NG, or Packet Tracer.

How long does CCNP ENCOR prep take at 45 to 60 minutes per day?​

At 45 minutes per day with a fresh CCNA, median time-to-ready sits between 14 and 20 weeks. At 60 minutes per day with current production networking experience, 10 to 14 weeks. The roadmap is sized from your CAT baseline, not a marketing window. A novice on Infrastructure or SD-WAN gets the longest plan; a working network engineer with daily OSPF and BGP exposure lands closer to 10 weeks.

What is the CCNP recertification cycle?​

CCNP certifications are valid for three years from the pass date. Recertification options include passing one Professional-level exam (any 300- or 350-series), passing the CCIE written, or earning Continuing Education credits through Cisco's CE program. Most engineers recertify by sitting the next Concentration exam they need anyway, which both refreshes CCNP and adds a specialty.

How is ENCOR different from the legacy CCNP Routing and Switching?​

Cisco's 2020 overhaul replaced the three-exam CCNP Routing and Switching (ROUTE, SWITCH, TSHOOT) with a single Core plus one Concentration. 350-401 ENCOR is that Core. It adds significant SD-WAN, SD-Access, programmability, and wireless content; it cuts depth on classic IGP topology corner cases. The current blueprint is the February 2024 refresh.

Start your CCNP ENCOR prep​

The cheapest signal is the 15-minute CAT evaluation. It tells you which of the six 350-401 domains you actually own, which one will cost you the exam if you sit it next month, and where the roadmap should start. Background reading: the AI cert prep guide covers the four categories of AI prep tools, and the pass guarantee page lays out the five eligibility conditions in full.

Start your free CCNP ENCOR evaluation now.