OSI Physical Layer. Network Fundamentals – Chapter 8. Fiber Media. Copper uses electrical voltage to represent data. Fiber-optic cable uses light pulses conducted through special glass conductors to carry data .
PowerPoint Slideshow about ' OSI Physical Layer' - wylie
An Image/Link below is provided (as is) to download presentation
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Four common data communications standards that apply to wireless media:
■ Standard IEEE 802.11: Commonly referred to as Wi-Fi, 802.11 is a wireless LAN (WLAN) technology that uses a contention or nondeterministic system with a carrier sense multiple access/collision avoid (CSMA/CA) media access process.
■ Standard IEEE 802.15:Wireless Personal-Area Network (WPAN): Commonly known as Bluetooth, 802.15 uses a device-pairing process to communicate over distances from 1 to 100 meters.
■ Standard IEEE 802.16: Commonly known as WiMAX (Worldwide Interoperability for Microwave Access), 802.16 uses a point-to-multipoint topology to provide wireless broadband access.
■ Global System for Mobile Communication (GSM): Includes physical layer specifications that enable the implementation of the Layer 2 General Packet Radio Service (GPRS) protocol to provide data transfer over mobile cellular telephony networks.