01 CISCO / NETWORKING CURRICULUM
Learn networking.
Understand why it works.
A structured course from physical signals on a cable to routing, network services, security, and automation. Lessons combine explanations, original diagrams, configuration examples, and interactive knowledge checks.
30published learning modules
95original practice questions
CCNA200-301 exam alignment
YOUR WORKSPACE
Your learning progress
Completion is saved locally in this browser. You can continue where you left off on this device.
How to use this course
Follow the modules in order if you are new to networking. Each lesson builds on earlier concepts. Finish the knowledge checks, then use the command reference when configuring or troubleshooting devices. Your lesson completion and quiz results stay in this browser.
Showing all 30 modules
PART 01 / FOUNDATIONS
Networking fundamentals
Understand the components, models, media, and protocols that make networks function.
01 The Physical LayerSignals, bits, media, cabling, connectors, transceivers, and physical-layer characteristics.FOUNDATIONS Open lesson 02 The Data Link LayerFrames, MAC addressing, LLC/MAC sublayers, media access, and Layer 2 delivery.FOUNDATIONS Open lesson 03 Ethernet and SwitchingEthernet frame fields, MAC learning, forwarding decisions, switching tables, duplex, and speed.FOUNDATIONS Open lesson 04 Network Devices and TopologiesRouters, switches, access points, firewalls, endpoints, physical/logical topologies, and network architectures.FOUNDATIONS Open lesson 05 Network Models and EncapsulationOSI and TCP/IP models, PDU names, encapsulation, decapsulation, and protocol interaction.FOUNDATIONS Open lesson 06 Number Systems and Binary MathBinary, decimal, hexadecimal, bitwise reasoning, and conversions used in addressing.FOUNDATIONS Open lesson 07 IPv4 Addressing and SubnettingAddress structure, network/host portions, masks, CIDR, subnet ranges, VLSM, and troubleshooting.FOUNDATIONS Open lesson 08 IPv6 AddressingAddress structure, compression, prefix lengths, global/local/multicast/anycast, and configuration.FOUNDATIONS Open lesson 09 The Network Layer and Routing BasicsLogical addressing, packet forwarding, routing tables, next hops, longest-prefix match, and TTL/hop limit.FOUNDATIONS Open lesson 10 ARP, Neighbor Discovery, and ICMPIPv4 ARP, IPv6 Neighbor Discovery, ICMP messages, ping, traceroute, and fault isolation.FOUNDATIONS Open lesson 11 The Transport LayerTCP and UDP, ports, sockets, connection setup/teardown, reliability, and flow control.FOUNDATIONS Open lesson 12 Application Layer and Common ServicesDNS, DHCP, HTTP(S), SSH, FTP/TFTP, SMTP, NTP, SNMP, and client/server behavior.FOUNDATIONS Open lesson
PART 02 / NETWORK ACCESS
Switching, wireless, and LANs
Build and operate local networks with VLANs, trunks, redundancy, and wireless access.
13 VLANs and 802.1Q TrunkingAccess ports, VLAN databases, native VLANs, allowed VLANs, voice VLANs, and trunk troubleshooting.NETWORK ACCESS Open lesson 14 Inter-VLAN RoutingRouter-on-a-stick, SVIs, Layer 3 switching, default gateways, and verification.NETWORK ACCESS Open lesson 15 Spanning Tree ProtocolLoops, root bridge election, port roles/states, RSTP, PortFast, and BPDU Guard.NETWORK ACCESS Open lesson 16 EtherChannel and Link AggregationLACP, channel groups, negotiation, load distribution, and troubleshooting.NETWORK ACCESS Open lesson 17 Wireless LANs and ArchitecturesRF fundamentals, AP/WLC roles, WLAN components, channels, authentication, and wireless security.NETWORK ACCESS Open lesson
PART 03 / CONNECTIVITY & OPERATIONS
Routing, services, and operations
Connect networks, deliver services, secure devices, and troubleshoot end-to-end behavior.
18 Static and Default RoutingConnected, static, floating static, default routes, IPv4/IPv6 route configuration, and verification.IP CONNECTIVITY Open lesson 19 Dynamic Routing and OSPFRouting protocols, metrics, administrative distance, OSPF neighbors, areas, and single-area configuration.IP CONNECTIVITY Open lesson 20 Routing Troubleshooting and First-Hop RedundancyRoute selection, gateway redundancy concepts, path failures, and systematic troubleshooting.IP CONNECTIVITY Open lesson 21 IP ServicesDHCP, DNS, NAT/PAT, NTP, SNMP, Syslog, QoS, file transfer, and device management.IP SERVICES Open lesson 22 Network Security FundamentalsThreats, vulnerabilities, secure device access, passwords, SSH, ACLs, Layer 2 security, and VPN concepts.SECURITY Open lesson 23 Network Automation and ProgrammabilityTraditional vs. controller-based networking, SDN, APIs, REST, JSON, configuration management, and AI/ML concepts.AUTOMATION Open lesson 24 Cisco IOS XE CLI and Device ManagementCLI modes, configuration files, CDP/LLDP, SSH, and safe device administration.IOS XE Open lesson 25 Access Control Lists and Traffic FilteringStandard and extended ACLs, wildcard masks, evaluation order, placement, and verification.SECURITY Open lesson 26 NAT, PAT, and DHCP ConfigurationDHCP pools and relay, static/dynamic NAT, PAT overload, and troubleshooting.IP SERVICES Open lesson 27 Layer 2 and Wireless SecurityPort security, DHCP snooping, Dynamic ARP Inspection, IP Source Guard, WPA2/WPA3, and 802.1X.SECURITY Open lesson 28 QoS and Network Monitoring ServicesClassification, marking, queuing, shaping, policing, NTP, SNMP, and Syslog.IP SERVICES Open lesson 29 Network Virtualization and Cloud NetworkingHypervisors, VMs, containers, VLANs, VRFs, overlays, and cloud deployment models.FUNDAMENTALS Open lesson 30 Integrated Network Troubleshooting and Exam ScenariosLayered fault isolation, IOS XE verification, end-to-end testing, and scenario practice.PRACTICAL REVIEW Open lesson
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KEEP BUILDING
Move from concepts to commands.
Use the IOS XE reference to look up verification commands, configuration patterns, and common troubleshooting workflows.