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In this video, we're going to discuss binary binary is a fundamental building block in networks today.
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You need to understand binary if you want to be able to work with networks.
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It's used in multiple places.
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Now, don't worry if you don't know what this means.
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We'll explain it later in the course.
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But just be aware that you need to know binary to work with access lists or access control lists that
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allow you to permit or deny traffic based on an IP address.
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When you configured devices in your network with various IP addresses, you may want to permit one device
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to talk to another device, but then deny a third device from talking to that second device.
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Now, to do that, you permit or deny traffic based on a IP address, whether that's a source IP address
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or a destination IP address.
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You're going to match specific IP addresses based on a binary representation.
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Computers, networking devices and machines use binary.
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That's what they understand.
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We may use English or another language to communicate.
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But machines use binary.
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And for you to implement things like access control lists in a network or something like a subnet mosque.
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So determining what a subnet mosque is for a specific network, you need to understand binary.
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So make sure that you don't skip the section.
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If you don't know the answer to this question.
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I've seen this printed on many t shirts.
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So if you don't know the answer to those questions, then don't skip the section.
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There are only one zero types of people in the world, those that understand binary and those that don't.
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How would you read that?
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Would you read that number as one zero as in 10?
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Or would you read it as two if you understand this joke?
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You probably want to skip this video, the section and go to the next section, but make sure that you
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know how to convert IP addresses as a dotted decimal.
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IP addresses to binary.
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If you're not sure what I'm talking about, you don't understand this joke.
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Don't worry that one zero means two in binary.
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So the joke is there are only two types of people in the world, those that understand binary and those
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that don't.
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If you didn't get the joke.
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Don't worry.
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By the end of this video, you'll understand this joke and understand where the one zero comes from.
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Now, as an analogy, to help us understand binary, let's use the analogy of electricity, because
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computers, let's be honest, they have chips in them rather than switches, have specific types of
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chips known as a sex or application, specific integrated circuits.
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It's basically a circuit.
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So computers have circuits and they run on electricity.
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In electricity.
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We either have two states.
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Something is on as in this current or power to the device or it's off.
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So as an analogy, I notice that big like there, that's an old antique lamp.
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But I've put a huge bold in that lamp.
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So that's on.
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That's off no power.
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On those power.
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That's of no power.
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That's on on means.
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Current is applied off means current is removed, so a computer basically only has two states, current
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or no current, on a circuit that.
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However, let me turn that back on again.
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That, however, gives us two states.
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So one cable gives us two states.
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So remember this.
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All computers function by using a system of switches that can either be on or off.
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Off equals zero.
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On equals one are binary values or either zero or one.
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So once again, our analogy.
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That's one.
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That's zero one zero.
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I won't bore you too much during that.
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The moral of the story is make sure you understand that binary consists of two states or two values.
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Zero one.
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That becomes really important now as we scale this analogy.
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