Rob C Woodworth | Cybersecurity Student

       The overall task of the Physical layer is that the Physical Layer creates a connection between a device and the transmission medium. The Physical Layer deals with the physical attributes of the connection that’s used to transmit data across a single link. The physical layer also encodes the data for transmission and determines the shape of the connectors and the types of mediums used for transport. The modulation of the bit encoding is one of the best ways to determine how fast data can be transmitted across the link, whether that link is wireless, copper, or fiber optic. So, what are some of the things the Physical Layer does?     1. Converts signal from one form to another so it can be transmitted     2. Bit-by-bit delivery     3. Bit synchronization for synchronized serial communication     4. Start signals and stop signals for asynchronous serial communication     5. Carrier sensing...

Wireless network devices usually fall into three categories;     -Wireless Personal Area Network (WPAN) like Bluetooth, NFC or IR,     -Wireless Local Area Network (WLAN) like WiFi,     -and Wireless Wide Area Network (WWAN) like Cellular or Microwave. While these devices are used in different situations, they have similar connection processes and distinct shared benefits. 1: The first benefit is portability. Untethered by cables, these devices go with you. For cellular devices, this means you don't need to find a connection point to use your phone, your magic rectangle just sits in your pocket and is always connected to voice and internet. For WPAN and WLAN, it means you don't need to worry about cables, a much cleaner environment.  2: The second benefit is ease of use. You don't need to sit there tuning a radio receiver to make these devices connect, you just use the interface and the computer handles the standardized connection. For Cellular, you ju...