NETWORK ENGINEER LEARNING PATH

Network Engineer Programme

A progressive engineering path from Ethernet and IP through VLANs, routing, firewalls, WiFi, fibre, monitoring, troubleshooting and commissioning.

Who this is for

Someone who installs, supports or designs switched, routed, wireless or fibre networks. Start with the first phase even if you already know the terminology.

How to use it

Follow the modules in order the first time. Return later by subject when you need a field reference.

End goal

You should be able to reason through a packet path, design the supporting infrastructure, verify it with evidence and troubleshoot failures without random changes.

Phase 1: Build the packet-path model

Learn what must happen from the cable through Layer 2 and Layer 3 before adding advanced features.

Networking fundamentalsBuild the mental model for Ethernet, IP, switches, routers and end-to-end traffic.FOUNDATION

Structured cablingUnderstand the physical channel the network depends on.PHYSICAL

IPv4, routing, NAT, DHCP and DNSFollow traffic from a client to another subnet and out toward the Internet.CORE

Managed switching and VLANsSeparate departments logically while using the same physical switching infrastructure.CORE

Phase 2: Switching and routing

Build networks that remain predictable when links and paths multiply.

STP and LACPPrevent loops and combine links without creating Layer 2 chaos.SWITCHING

Static routing, OSPF and failoverChoose routes and understand what changes when a path fails.ROUTING

ACL designTranslate permitted and denied traffic into maintainable network policy.SECURITY

Stateful firewall policyUnderstand sessions, zones and why firewall policy is more than a port list.SECURITY

DHCP snooping and edge protectionProtect access networks from common Layer 2 mistakes and rogue services.SWITCHING

LLDP and discoveryUse neighbour information to understand what is actually connected.OPERATIONS

Phase 3: Wireless, PoE and fibre

Move beyond copper switching into the infrastructure that connects modern endpoints.

PoE engineeringBudget switch power and troubleshoot devices that do not power correctly.POWER

WiFi deployment and tuningDesign for clients, interference and capacity rather than just signal bars.WIRELESS

WiFi capacity and roamingUnderstand why good RSSI alone does not guarantee a good user experience.WIRELESS

Fibre installationHandle, route, protect and test optical cabling correctly.FIBRE

Transceivers and DOMMatch rate, wavelength, fibre and optics, then interpret digital optical monitoring.FIBRE

Optical loss budgetsCalculate whether the optical path has enough engineering margin.CALCULATION

Phase 4: Operate and troubleshoot

A network engineer must be able to prove where a fault is, not merely change settings until it disappears.

QoS for voice and videoManage contention and understand classification, marking and queues.PERFORMANCE

Multicast and IGMP snoopingControl multicast forwarding and understand the querier/group relationship.ADVANCED

Interface counters and baselinesKnow what normal looks like before trying to diagnose abnormal.OPERATIONS

SNMP, syslog and NTPCreate evidence that survives after the fault has passed.OPERATIONS

Network fault findingWork from physical layer upward and isolate the failing layer.TROUBLESHOOTING

Outage triage and change controlRestore service methodically without destroying the evidence.INCIDENT

Network health checkAssess an existing environment before proposing changes.ASSESSMENT

Commissioning and acceptanceProve the network against the design before handover.FINAL LAB

By the end of this programme

☑ Explain a packet path from endpoint through switching, routing, policy and destination.

☑ Design VLAN, trunk, routing and firewall boundaries around actual business requirements.

☑ Plan PoE, wireless and fibre as engineering systems rather than isolated products.

☑ Use counters, logs and monitoring to establish evidence.

☑ Troubleshoot from the physical layer upward.

☑ Commission and document a network before handover.

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