A Network Engineer is responsible for designing, configuring, maintaining, and troubleshooting network infrastructure in organizations. This roadmap is created from real industry workflow, focused on what freshers actually learn and do in companies. If you want to start a career in networking, follow this complete guide step by step.
1). Start with Basics (0–2 Months)
Topics to learn
What is a network?
LAN, WAN, MAN basics
OSI Model & TCP/IP
IP Address, Subnet, Gateway
Static vs Dynamic IP
Public vs Private IP
IPv4 vs IPv6
Small practice tasks
Assign IP to PC manually
Test network using ping
Learn ipconfig, tracert, nslookup commands
2). Networking Core (2–4 Months)
Subnetting & CIDR
DNS, DHCP working
VLAN, Inter-VLAN Routing
ARP, MAC Address table
STP (Spanning Tree Protocol)
Routing basics (Static & Dynamic)
NAT, PAT
Hands-on practice
Create VLANs on Packet Tracer
Configure router IP and routing
Test VLAN communication
3). Tools & Platforms You Must Know
Tool/Concept
Why it’s important
Cisco Packet Tracer / GNS3 / Eve-NG
Network simulation & practice
Putty / SSH
Router & switch access
Wireshark
Packet analysis
Linux basics
Networking testing
NMS tools (SolarWinds, PRTG, Datadog)
Monitoring & alerts
Firewall basics
Security of networks
4). Certification Path (Industry Preferred)
Level
Certification
Beginner
CCNA
Intermediate
CCNP (Routing & Switching)
Advanced
Firewall/SD-WAN/Security Specialization
5). Real Job Responsibilities of Network Engineers
