Week 4 Lan

WAN TECHNOLOGY

With WAN Technologies, systems T1, and T3 are the most commonly used today. T2 offer up to 24 channels, while T3 boasts up to 672 channels.

PACKET SWITCHING

Packet switching is a digital networking communications method that groups all transmitted data regardless of content, type, or structure into suitably sized blocks, called packets. This method of data transmission became the fundamental networking technology behind the Internet and most local area networks. Circuit-switched networks require dedicated point-to-point connections during calls. In modern circuit-switched networks, electronic signals pass through several switches before a connection is established. And during a call, no other network traffic can use those switches.

MULTIPLEXING

When multiple signals are sent over a single transmission channel, the process that keeps the signals from interfering with one another is called multiplexing. Multiplexing integrates multiple analog and digital signals into a signal transmitted over a shared medium. Phone calls are a good example of multiplexing in telecommunications. More than one phone call is transmitted over a single medium. DWDM stands for Dense Wavelength and Division Multiplexing and is a type of optical technology which is majorly introduced to further increase the bandwidth over fiber optic to overcome the requirements. It functions by transmitting and combining many signals instantly of different wavelengths at the single fiber. A single fiber is in turn turned into many 'virtual fibers' and because of this technique, DWDM is capable to transmit data with a speed of more than 400 Gbps.

AUTHENTICATION AUTHORIZATION

Authentication verifies who you are. Authorization verifies what you are authorized to do. My job name badge and picture is authentication for me to enter the premise, but I’m not authorized to enter in mechanical areas because I’m not a certified mechanic. Or an app can ask for your authorization to make a...