Computer Networking · Intermediate level

Intermediate level · Module 1 of 6 · 15 guided hours

TCP/IP and Subnetting

Understand how protocols work together and divide IPv4 address space into subnets.

Learning objectives

  • Explain the OSI and TCP/IP models
  • Calculate IPv4 subnets
  • Explain TCP, UDP and ports

Topics

  • OSI and TCP/IP models
  • encapsulation
  • binary and CIDR
  • subnet calculation
  • TCP and UDP
  • common ports

Lessons

  1. Lesson 1 Network Models and Encapsulation

    Use layered models to understand and troubleshoot networks.

    OSI modelTCP/IP modelencapsulationframes, packets and segments

  2. Lesson 2 Subnetting IPv4

    Divide an address block into correctly sized subnets.

    CIDR prefixsubnet maskusable hostsbroadcast address

  3. Lesson 3 TCP, UDP and Ports

    Understand how applications use transport protocols.

    TCPUDPportsthree-way handshake

Practical activity

Subnet a /24 network for five departments and verify the calculations with a classmate.

Expected outcomes

  • Confident subnet calculation
  • Clear model of protocol layers

Assessment

Subnetting test and layer-matching exercise.

Taught live by an instructor — online or in person. Free course lessons are for self-study and do not lead to a certificate — see registration options.