From the course: CISSP Cert Prep (2021): 4 Communication and Network Security
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Transmission media
From the course: CISSP Cert Prep (2021): 4 Communication and Network Security
Transmission media
- [Instructor] The physical layer of networks may consist of a variety of different transmission media, all suitable for different circumstances. The beauty of a layered approach to networking is that the protocols built on top of that physical infrastructure abstract it from users. We generally don't need to worry about the physical layer unless we're specifically focused on designing, securing and maintaining it. Let's take a look at some of the common options for transmission media. No matter what transmission media we use, the goal is the same, to take the digital ones and zeros that are used in computing and convert them to some other form where they can be transferred over a distance. The ethernet cables that we're all familiar with do this by transmitting pulses of electricity over copper wires with precise timing. If there is electricity at a particular time, that presence of electricity represents a one, while if…
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