Network Engineer roadmap
The skills, tools, certifications and practice behind a first network engineering job — in the order the Cyber Career Lab learning path teaches them.
Network engineers keep the switches, routers, wireless and WAN links that everything else depends on running. The first networking course on this path needs nothing more than basic computer use. From there the work is about building a solid mental model of how traffic moves, configuring devices carefully, and troubleshooting with evidence instead of guesses.
A network engineer designs, builds, changes and fixes the network: turning business requirements into an address plan, VLAN design and routing design; configuring and verifying switching, routing, services, security and monitoring; and resolving outages methodically, then writing them up. See the Network Engineer career path for how the role works on this platform.
Convert between decimal and binary for any IPv4 octet; understand subnet masks, prefix lengths, private ranges and special addresses; calculate the network, broadcast, host range and host count of any subnet; design a variable-length (VLSM) address plan from requirements; and read, compress and classify IPv6 addresses, including SLAAC and Neighbor Discovery.
show vlan brief.Read show ip route and predict which route a packet will use; configure static, default and floating static routes and remember the return path; set up inter-VLAN routing with subinterfaces and switch virtual interfaces; configure, verify and troubleshoot single-area OSPFv2; and provide first-hop redundancy with HSRP.
Understand DHCP (DORA), configure IOS DHCP pools and relays, and troubleshoot exhaustion and rogue servers; troubleshoot name resolution with nslookup, Resolve-DnsName and dig; configure static NAT and PAT and read the translation table; and write standard and extended ACLs with correct wildcards, order and placement, diagnosing problems with hit counters and the implicit deny.
Apply a layered, evidence-based troubleshooting method and communicate during incidents; locate faults along a path with ping, traceroute and IOS show commands; back up configurations, make changes safely and detect drift; then stop repeating yourself with Python and Netmiko scripts and idempotent Ansible playbooks run in check mode.
Configuration knowledge only counts if you can find a fault under pressure. In Job Workstation, Network Engineer tickets give you a simulated switch and router command line and a synthetic outage to scope, prove and fix:
Guided labs: there is no guided lab written for Network Engineer yet. The closest is the traffic-reading lab shared with the Network Security Analyst specialisation, Reading Traffic Patterns (Free). See Labs by career path, and try the IT and infrastructure projects in our home lab guide.
Certifications help you pass CV filters and give structure to your learning. Common entry points are CompTIA Network+ (vendor-neutral, broad fundamentals) and Cisco CCNA (the most recognized entry-level networking certification, including hands-on configuration). Juniper’s JNCIA-Junos is an alternative for Juniper-heavy employers. After a year or two of experience, engineers typically move to CCNP Enterprise or a specialisation in security (for example vendor firewall certifications or CompTIA Security+), wireless, cloud networking or automation (Cisco DevNet Associate). Check current exam objectives with each vendor, and compare them in our certifications guide.
Junior network interviews mix definitions, “walk me through” questions, troubleshooting scenarios and questions about your projects. For walk-throughs, narrate the layers; for scenarios, narrate your method: scope, recent changes, layered tests, the commands you would run and what each result would tell you. It is fine to say you would check the documentation; it is not fine to guess confidently. Practice these out loud:
The Network Engineer path in the Academy has 14 courses, in this order:
On this platform, Network Security Analyst is the specialisation that builds on Network Engineer.
FAQ
No. Networking Fundamentals needs only basic computer use; IT Fundamentals is helpful but optional.
The first six Academy courses, including Networking Fundamentals and IP Addressing & Subnetting, are marked Free; the remaining eight are Pro. In Job Workstation, Finance can’t reach the file server is Free and the other six tickets are Pro. See Pricing for plan details.
Both are common entry points. Network+ is vendor-neutral and broad; CCNA is the most recognized entry-level networking certification and goes deeper, including hands-on configuration. See our certifications guide.
Not to start. The path introduces automation later, with Python and Netmiko scripts and Ansible playbooks, once the fundamentals are in place.
Step 8, done properly
Start with the free ticket “Finance can’t reach the file server”: troubleshoot the campus switches from a simulated command line and restore access.
Start free. No experience required.