CSCN230 Lecture 4: Conducted and Radiated Media

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The world of computer networks would not exist if there were no medium by which to transfer data. Usb type a, type b, type b micro, usb-c, lightning, thunderbolt. One or more pairs of single conductor wires that have been twisted around each other. Twisted pair wire is classified by categories 1 through 8, although 1-4 are nearly obsolete. Twisting the wires helps eliminate electromagnetic interference between two wires. Wires running parallel will interfere with each other; perpendicular wires have the least chance of crosstalk. Twisted wires keep crossing to nearly perpendicular angles. Shielding is put around each twisted pair and the collection of pairs. Twisted pair is the most common form of wire. Carries high data rates (but not the highest) Can be easily wiretapped (bc of induction, can listen in by being close) Single wire wrapped in foam insulation surrounded by a braided metal shield, then covered by a plastic jacket.

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