CS 202 Lecture Notes - Lecture 2: Transmission Control Protocol, Darpa, Ip Address
2 Feb 2017
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Document Summary
Module 2: networks: telecommunications infrastructure refers to hardware, software, and protocols that support telecommunications. 4 parts: sender, receiver, information, and a medium to travel. Sender and receiver must speak the sa(cid:373)e la(cid:374)guage . Protocols govern how telecommunications are transmitted and translated. Telecommunication signals: telecom signals are analog or digital electronic transmissions for the purpose of communication. Can reach all corners of the globe! How you send it matters in terms of speed and signal strength. Analog signal fluctuates in voltages similar to curve waveform. This use to be how all sound was transmitted. Digital signal is a discrete voltage similar to a box-like waveform. This shows either a high(1) or a low (0) state. This is how digital signals carry computer data and how it represents it as bits. The speed at which this signal changes from high to low is called frequency. Computer networks measure transmission rates by bandwidth (bits per second).
