{ "item_title" : "The Physical Layer through Optical Networks", "item_author" : [" John Dekker "], "item_description" : "This specialty workbook was written for second year College students in a computer systems and networking program. Electrical and optical network devices, protocols and systems are used in developing the key physical principles and concepts of the OSI model's physical layer. Topics include: transmission media, Optical and twisted pair connectors, pinout assignments, signal speed and voltage, signal encoding and transmission devices, electrical cable properties of RC filters and decibel calculations.", "item_img_path" : "https://covers2.booksamillion.com/covers/bam/1/31/243/139/1312431393_b.jpg", "price_data" : { "retail_price" : "113.36", "online_price" : "113.36", "our_price" : "113.36", "club_price" : "113.36", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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