new ccna 200 301 training

new ccna 200 301 training.3.2 Basic Topics3.2.1 Wireless Network Characteristics Many factors can have an impact on wireless transmissions. Given this, it is important to understand the actual factors involved in wireless transmission so that it is clear what effects they are undergoing. This section reviews the concept of wavelength, the way in which frequency is used in wireless transmission, and what the usefulness of amplitude is. Also covered is the way to calculate EffectiveIsotropicRadiatedPower (EIRP) and its definition.1. Wavelength ReviewWavelength ( wavelength) is the distance between successive wave crests, which is how wavelength is measured. Most people have seen examples of sound waves. The wavelength can be determined by measuring the length between each wave crest. This is a distinctive feature of radio waves sent from a transmitter. Recall from Chapter 1 that the waveform is presented in a form called a sinewave (sinewave) oThe waveform originates from an AC signal, generated by a transmitter within the AP, and is then sent to the antenna, where it is presented as a sinewave at the antenna3.2 Basic Topics 23which is radiated out as a sinewave. In this process, the current changes the electromagnetic field around the antenna, so that the electromagnetic signal can be emitted. The magnitude of the wavelength is fixed and can be measured from one point on the AC cycle to the corresponding point on the next AC cycle.This in turn is called a waveform (wavefbrm). Here are some concepts about waveforms that may be covered. AM radio wavelengths are 400 to 500 meters long.Radio waves in a WLAN are only a few centimeters long. Radio waves emitted by satellites are about 1 mm long.2. Frequency Review