LCPE study guide
LCPE · Work through your exam, one topic at a time.
LCPE is a professional-level networking certification exam structured around six weighted domains: Network Fundamentals (20%), Network Access (20%), IP Connectivity (25%), IP Services (15%), Security Fundamentals (15%), and Automation and Programmability (5%). It is aimed at engineers who already build and troubleshoot routed and switched networks and want formal recognition of that skill, typically people moving from entry-level support into design, implementation, or operations roles. The LCPE study guide has 6 sections and about 1,765 words.
01Network Fundamentals
Network Fundamentals carries a large share of the LCPE blueprint and tests whether you can explain how data moves from an application to a wire and back: the OSI and TCP/IP models, Ethernet media and duplex, IPv4/IPv6 addressing and subnetting, TCP versus UDP behavior, wireless principles, and virtualization concepts. Encapsulation order: data → segment (TCP/UDP, port) → packet (IP, address) → frame (MAC) → bits.
315 words, about 2 min02Network Access
Network Access tests Layer 2 delivery: how VLANs segment a switch, how trunks carry them, how Spanning Tree keeps loops out, how EtherChannel adds bandwidth, and how wireless clients associate through an AP and WLC. Access ports belong to one VLAN and send untagged frames.
312 words, about 2 min03IP Connectivity
IP Connectivity covers how a router chooses a path: routing table contents, static and default routes, administrative distance, single-area OSPFv2, and first-hop redundancy protocols. Longest prefix match wins before any other comparison.
304 words, about 2 min04IP Services
IP Services covers the supporting protocols that make a network usable and observable: NAT, DHCP, NTP, DNS, SNMP, syslog, QoS marking, and file or remote-access services. NAT terms: inside local (private host), inside global (public address after translation), outside global (remote host).
280 words, about 1 min05Security Fundamentals
Security Fundamentals tests defensive design rather than exploits: the CIA triad, threat categories, AAA, ACLs, Layer 2 hardening, VPN types, and wireless security standards. ACLs process top-down and stop at the first match; every ACL ends with an implicit deny.
274 words, about 1 min06Automation and Programmability
Automation and Programmability checks whether you understand how software manages modern networks: SDN architecture, controller-based networking, APIs and data formats, configuration tools, and model-driven telemetry. SDN separates the control plane (decisions) from the data plane (forwarding).
280 words, about 1 min