Addressing in ipv4 : part 1 (Lesson: 6)

Addressing in ipv4 (part 1)

Overview

In the previous chapter, we looked at the network layer and its involvement in communication. in this chapter, we will look at ipv4 addressing. This is one of the most important concepts in networking and will be critical in your overall success in networking. Understanding this chapter is critical to the rest of your studies. This chapter is divided into two parts so that it can better understood. In the first part, we will look at binary vs decimal, then we will be introduced to subnetting. Then we will finish up by subnetting a few addresses.

Decimal vs binary

We are used to decimals. The number systems used everywhere today is mostly binary. Base of 10.

10^0=1
10^1=10
10^2=100

This is what we use in day to day activities. However, computers are limited to only 2 digits. “1” and “0”, which represent “ON” and “OFF”. The ip addressing system we use is based on this concept. All ipv4 addresses that we use are a decimal representation of the binary form that the computer knows about.

The table below shows the difference between decimal and binary connotations.

You will be seeing the binary table more frequently as we continue in this chapter and others.

How networks are addressed

I believe the most of you have seen an ip address. The ip addressing scheme used contains two parts.

• The network part – from the left hand side
• The host part – from the right hand side

In IPv4 addresses, the high-order bits (bits starting from the left side) represent the network address, the low-order bits (bits on the right hand side) represent the host portion. In IPv4 addressing, hosts who have matching high-order bits are said to be in the same network.

Windows Ink: How to use Sketch pad

Windows Ink: How to use Sketch pad

Sketch pad is a new feature available in the Windows 10 Anniversary Update, part of the new Windows Ink Workspace feature-set. It allows tablet users to doodle, take notes and more directly on their tablets in a dedicated inking environment, equipped with virtual rulers, pen-types and more. Here's how to use it.

How to open Sketch pad

1. Tap the Pen icon on the taskbar to open the Ink Workspace.

2. Tap the "Sketch pad" feature when Ink Workspace is open. It will be the second block in the list. You'll be greeted with a white canvas.