1.6 – Network Topologies
Network Topologies
We often use broad descriptions when describing network topologies. In this video, you’ll learn about star, mesh, hybrid, spine and leaf, and other network topology types.
Network Architectures
Many networks are built using well-established design criteria. In this video, you’ll learn about three-tier architectures, collapsed core designs, and traffic flow in a data center.
1.7 – IPv4 Addressing
Binary Math
If you’re calculating IP subnets, it will be useful to understand the basics of binary math. In this video, you’ll learn how to convert between decimal and binary IP addresses.
IPv4 Addressing
IPv4 is one of the most popular protocols in the world. In this video, you’ll learn about the fundamentals of IPv4 addressing, automatic IP addressing, and the difference between public and private IP addresses.
Classful Subnetting
We’ve designed IPv4 to support nearly any network size. In this video, you’ll learn the fundamentals of IPv4 subnetting and how network classes are used as a starting point for IP subnetting.
IPv4 Subnet Masks
The transition to variable length subnet masks provides efficiency and flexibility with IP addressing. In this video, you’ll learn about classless subnetting and CIDR-block notation.
Calculating IPv4 Subnets and Hosts
Understanding how to subnet using variable length subnet masks are important for any network administrator. In this video, you’ll learn how to use variable length subnet masks to segment a network into smaller IP subnets.
Magic Number Subnetting
There are many different shortcuts that network administrators use to quickly calculate IP subnet information. In this video, you’ll learn about the magic number method of IP subnetting.
Seven Second Subnetting
Some network administrators need to subnet quickly with a minimal amount of math. In this video, you’ll learn about the seven second subnetting shortcut for IP subnetting.
1.8 – Network Environments
Software Defined Networking
Software defined networking provides a number of advantages over traditional networking. In this video, you’ll learn about the fundamentals of software defined networking and how SD-WAN can be used to optimize cloud-based application traffic.
Virtual Extensible LAN
Virtual Extensible LAN is designed for large-scale service providers and data centers. In this video, you’ll learn about VXLAN and how a virtual extensible LAN design can scale to millions of virtual networks.
Zero Trust
Many networks are relatively open on the inside. In this video, you’ll learn about zero trust, policy-based authentication, least privilege, Secure Access Service Edge, and more.
Infrastructure as Code
Describing a network design as code can provide flexibility for design and deployment of cloud-based infrastructures. In this video, you’ll learn about playbooks, automation use cases, and source code control.
IPv6 Addressing
IPv6 is the next generation of IP addressing. In this video, you’ll learn about IPv6 addresses and methods of connecting IPv4 and IPv6 networks using tunneling, dual-stack routing, and NAT64.