• Online, Self-Paced
Course Description

Configuring Junos OS devices requires a thorough understanding of networking fundamentals, and this course is a primer in that understanding. It covers the fundamentals of networking, including the OSI network model, the routing and switching functions, and data-link and IP addressing. This course is one of a series of Skillsoft courses that cover the objectives for Juniper Networks exam JN0-102. This exam completes the requirement for the certification Juniper Networks Certified Associate - Junos (JNCIA-Junos).

Learning Objectives

Network Devices

  • start the course
  • describe the seven layers of the ISO Open Systems Interconnection model
  • describe the characteristics of layer 2 and layer 3 in the OSI model with respect to node-to-node and end-to-end communication
  • describe the concept of a collision domain in a layer 2 network
  • describe the concept of a broadcast domain in a layer 2 network
  • describe the function of layer 2 network switches
  • describe the function of layer 3 routers
  • describe the SONET and SDH protocols for transferring data over fiber optic cable
  • describe the OTN standard for optical networks
  • describe the basic characteristics of Ethernet
  • list the variants of Ethernet in common use


  • list and describe the addressing schemes used at layer 2 of the OSI model
  • describe address resolution at layer 2 and ARP
  • describe the fundamental properties and structure of IPv4 addresses
  • describe the fundamental properties and structure of IPv6 addresses
  • describe the use of subnet mask and default gateway for IPv4 addresses

Subnetting and Supernetting

  • describe the binary number system and how to convert from decimal to binary and binary to decimal
  • describe the process of subnetting to split an IP address space
  • describe the technique of supernetting to aggregate an IP address space
  • describe the function of routing tables and the longest match routing algorithm

Layer 4

  • describe the function of protocols at layer 4 and the main protocols in use
  • describe the operation of connection-oriented protocols and TCP
  • describe the function of connectionless protocols and UDP

Practice: Protocols and Functions

  • match protocols and functionality in networks to the layers responsible

Framework Connections

The materials within this course focus on the NICE Framework Task, Knowledge, and Skill statements identified within the indicated NICE Framework component(s):

Specialty Areas

  • Network Services
  • Systems Administration