CCNP ENCOR reference library
Quick-lookup reference pages.
Free, no sign-in required. Each page distills one ENCOR topic into the tables and definitions you actually reach for during review — not a substitute for the full lessons, but a fast second look.
AAA & Device Access Quick Reference
Method lists, fallback behavior, and TACACS+ vs. RADIUS — tested in ENCOR objectives 5.1–5.3.
Open reference →Control Plane Policing (CoPP) Quick Reference
Protecting the route processor without starving legitimate traffic — tested in ENCOR objective 5.5.
Open reference →Flexible NetFlow Quick Reference
Flow records, exporters, and monitors — the three components tested in ENCOR objective 4.3, and the most common reason NetFlow captures nothing.
Open reference →SPAN, RSPAN & ERSPAN Quick Reference
Traffic mirroring scope and the right tool for the job — tested in ENCOR objective 4.4.
Open reference →Catalyst Center Quick Reference
The four functional areas and how to treat AI-assisted suggestions — tested in ENCOR objective 4.6.
Open reference →Multicast Quick Reference: RPF, PIM-SM, IGMP, SSM, Bidir-PIM & MSDP
The RPF check, PIM-SM's RP/shared-tree model, IGMP versions, SSM, Bidir-PIM, and MSDP — tested in ENCOR objectives 3.15–3.20, in one page.
Open reference →EIGRP vs. OSPF Quick Reference
The trust model, metric, and convergence differences tested in ENCOR objective 3.5 — a fit-for-purpose comparison, not a search for a universal winner.
Open reference →OSPF Multiarea, Metrics & Area Types Quick Reference
Cost calculation, area types, virtual links, and adjacency requirements tested in ENCOR objectives 3.6–3.8.
Open reference →BGP Peering & Best-Path Quick Reference
eBGP session establishment and the best-path selection order tested in ENCOR objectives 3.9–3.10.
Open reference →HSRP vs. VRRP & Interface Tracking Quick Reference
First-hop redundancy terminology, virtual MAC ranges, and interface tracking tested in ENCOR objective 3.14.
Open reference →RSTP, MST, Root Guard & BPDU Guard Quick Reference
Fast convergence, VLAN-to-instance scaling, and the two spanning-tree guard features tested in ENCOR objectives 3.3 and 3.4, in one page.
Open reference →VRF, GRE & IPsec Quick Reference
VRF-Lite routing isolation, GRE tunneling, and IPsec's two-phase negotiation — the three tunneling/virtualization technologies tested in ENCOR objectives 2.4–2.6, in one page.
Open reference →QoS Fundamentals Quick Reference
Classification, marking, trust boundaries, queuing, congestion management, policing, and shaping — the building blocks tested in ENCOR objective 1.7, in one page.
Open reference →Python & JSON for Network Automation Quick Reference
Reading Python tracebacks, core data structures, and valid JSON syntax — tested in ENCOR objectives 6.1–6.2.
Open reference →YANG Data Modeling Quick Reference
Formal schemas for network configuration/state data — tested in ENCOR objective 6.3.
Open reference →RESTCONF & NETCONF Configuration Quick Reference
Constructing configuration requests (Configure-level) — tested in ENCOR objectives 6.7–6.8. See also the Network Assurance reference for Describe-level GET/get-config basics.
Open reference →IOS EEM Applets Quick Reference
On-device, event-driven automation with no external dependency — tested in ENCOR objective 6.9.
Open reference →HTTP/REST Response Codes Quick Reference
Fast triage by status-code range plus JSON error-body detail — tested in ENCOR objective 6.6.
Open reference →Trunk & EtherChannel Troubleshooting Quick Reference
802.1Q trunking, native VLAN, DTP, and LACP/PAgP EtherChannel — tested in ENCOR objectives 3.1–3.2.
Open reference →Standard & Extended ACL Quick Reference
Wildcard masks, ordering, and management vs. data-plane application — tested in ENCOR objective 5.4.
Open reference →Policy-Based Routing & NAT/PAT Quick Reference
Overriding destination-based routing, and translating addresses at the edge — tested in ENCOR objectives 3.11 and 3.13.
Open reference →SD-WAN & SD-Access Quick Reference
Control/data plane separation in both fabrics, and where traditional campus meets SD-Access — tested in ENCOR objectives 1.3–1.6.
Open reference →Threat Defense, NGFW, TrustSec & MACsec Quick Reference
Cross-component security architecture, deployment modes, and Layer 2 encryption scope — tested in ENCOR objectives 5.7–5.11.
Open reference →IP SLA Quick Reference
Active reachability/performance testing and tracked objects — tested in ENCOR objective 4.5.
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