Basic Concepts for Network Engineers

In this short blog I will put together a checklist of what I believe are basic (if not, fundamental) concepts and tools a network engineer should have in his/her arsenal. You could use this list as a tool to evaluate yourself. It could also give you some guidance for your reading material đŸ˜‰


And now, the list:

  • OSI / TCP-IP Models
    • What is it? Why is it needed?
    • Different tshoot tools at different Layers
    • Know at which Layer the most common protocols operate
    • Know some of the most common default TCP/UDP ports (smtp, dns, http, https, ssl, telnet, ssh, etc.)
  • Protocols
    • DNS
    • DHCP
    • TCP 3 x Way Handshake
  • Switching
    • What is a MAC address
    • What is switching?
    • Unicast vs. Broadcast
    • Know the difference between a broadcast and a collision domain
    • VLANs
    • Understand what are Layer2 loops and how are they formed; how to avoid them
  • Routing
    • What is an IP address
    • What is TTL; what’s its purpose
    • ARP Protocol; gARP
    • Understand what is routing?
    • What is NAT?
    • Dynamic vs. Static routing
    • What routing protocols are there
  • Troubleshooting Tools
    • Understand the MAC address table; how are MAC addresses learnt; factor in multiple switches
    • ping
    • How does traceroute work?
    • pathping (WinOS)
    • nslookup (Linux & WinOS) / dig (Linux)
    • telnet
    • curl

 

Thank you,

Rafael A. Couto Cabral • LinkedIn Profile
Cisco​ | F5 | VMware Certified • PRINCE2 Practitioner

Originally posted 2017-10-28 03:19:14.

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