IP Addresses and Subnetting

Explore decimal base-10 and binary base-2 numbering systems, using positional notation with digits 0–9 and 0–1 to build numbers like 523.

Learn how to convert a decimal number to binary and back, using division by two and binary weights, illustrated with 58 and cross-checked on Windows calculator.

Master binary to decimal conversion through step-by-step examples that sum powers of two, such as 32,16,8,4,2,1. Apply this skill to understand binary numbers for subnetting and IP addresses.

Explore how left padding with zeros does not alter a binary or decimal number's value, while adding zeros on the right increases value by adding place value.

Explain how IP addresses identify hosts and enable addressing using IPv4, a 32-bit address divided into four octets in dotted decimal, with binary to decimal conversion and 0–255 per octet.

Explore the evolution from IPv4 to IPv6, comparing 32-bit dotted-decimal addresses to 128-bit hexadecimal blocks, and understand address space size, notation, and the concept of prefixes.

Explore how 32-bit subnet masks define network and broadcast addresses by ANDing an IP with the default classful mask, revealing the network ID and host portions.

Explore the special loopback address 127.0.0.1, used by the IP stack to talk to the local machine, enabling local testing and self-communication.

Learn how subnetting borrows four host bits to form sixteen subnets with twenty host bits per subnet in an IPv4 class A network.

Demonstrate class c subnetting with an Excel example, borrowing three host bits to create eight subnets, each supporting 30 usable hosts, using 255.255.255.224.

Explains subnetting a class c address, derives the default mask, borrows three bits to create eight subnets with 255.255.255.224, and computes subnet IDs, broadcast addresses, and usable IP ranges.

Explore class B subnetting by borrowing three bits from the host portion of 172.16.0.0, creating eight subnets and about 65,534 usable addresses per subnet.

Discover class B subnetting by borrowing host bits, applying the default 255.255.0.0 mask and the 255.255.224.0 subnet mask, and deriving subnet IDs, broadcast addresses, and IP ranges.

This lecture covers class a subnetting by borrowing bits to create eight subnets with 21 host bits and applies to class b, detailing network IDs, usable ranges, and broadcasts.

Learn to build class B network IDs using the ninja method and an Excel spreadsheet, calculating subnets and masks (240, 224), and determining the first address and broadcast addresses.

Explore calculating subnets for a Class A network using Excel, deriving a 16-subnet scheme from 10.0.0.0, determining the subnet mask, ranges, and broadcast addresses.

Explore the three formats of subnet masks, decimal dotted notation, binary, and prefix slash notation, covering class a, b, and c masks and how network bits define ranges.

this video demonstrates subnetting a class c network using cidr notation, borrowing three bits to create eight subnets with a /27 mask, and identifying the subnet ids and host portions.

Explore vlsm subnetting on a class c 192.168.1.0/24 block by borrowing host bits to create multiple subnets with different masks, contrasting fixed and variable approaches.