The various devices on a network communicate with each other constantly, learn about ports and how to use them to separate message types.
- Now in addition to understanding … the general concept of protocols … and an example that we had with DNS, … it's also important to know … that when devices talk to each other, … they can be talking about many different things … at the same time. … So because they could be talking … about many different things at the same time, … there needs to be a way for these different applications … to all talk to the same IP address … because the network node has one IP address, … generally speaking. … The node can require multiple network applications, … and ports are the secret. … They're used to determine the application within the node … that should receive an incoming communication. … Notation of ports is simple. … It's simply IP_Address:Port, very simple. … For example, our earlier IP address of 10.10.10.20:80, … that is port notation. … So what that's saying is this is destined for port 80 … on the IP address of 10.10.10.20. … Now ports zero through 1023 are common or well-know ports, …
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Skill Level Beginner
1. Cloud Storage
2. Cloud Compute
3. Cloud Networking
4. Cloud Security
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