Firstly, the course contains theory chapters to ensure that the students understand how the data link layer work together with the TCP/IP protocol suite, and the common used features that can cause problems in your network. This includes issues such as auto-sensing, VLANs, subnetting, as well as redundancy logic on both layer 2(spanning tree) and layer 3(routing).

The course will attempt to help students to learn a method for how to perform structured troubleshooting in any generic IP network, including higher layer functions such as TCP/UDP, DHCP and DNS.

Target Audience

This course is suitable for anyone who works with hosts and/or network equipment and that needs to be able to troubleshoot network problems quickly and efficiently, with a good understanding of the bigger picture of IP networks and their functions.


The students need basic knowledge of TCP/IP and generic data communication, but repetition of these subjects will be included in the course.


This is a theoretical training with practical exercises.

NOTE: This course is not delivered with the FoldOut methodology.

Course content

Ethernet, Switching and VLAN

  • HUBs, Bridges and Switches
  • VLAN and 802.1Q
  • Layer 2 redundancy

Learning to use Wireshark

  • Basic traffic analysis
  • Understanding display filtering
  • Customizing Wireshark
  • Viewing Flows

Practical Exercises

  • Using Wireshark

Basic troubleshooting methodology

  • How to troubleshoot
  • Baselines and documentation
  • Reference models
  • Isolating the error

IP Fundamentals

  • Addressing and Subnetting
  • Error handling; ICMP, Ping, Traceroute
  • Network address translation
  • Basics IPv6

IP Routing and Forwarding

  • Using the routing table
  • Static and default routing
  • Dynamic routing protocols; RIP and OSPF

Theoretical Exercises

  • Subnetting
  • IP Routing

Practical Exercise

  • Switching and VLAN problems

Higher layers

  • TCP and UDP
  • Basics of Firewalls
  • Domain name resolution (DNS)
  • SNMP
  • Overview of VoIP and QoS

Practical Exercises

  • Lab 2 – Addressing, Static IP Routing. Using ping and traceroute
  • Lab 3 – Routing, ACLs, Higher layers

Duration: 3 days


Classroom training: € 2410

Virtual classroom training: € 1680

Recorded training: € 1680 Buy now

We offer substantial discounts for group bookings, and we have corporate rates with most of the operators and equipment suppliers in the world.

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