From the course: Networking Foundations: Protocols and CLI Tools

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The difference between packets and frames

The difference between packets and frames

- [Instructor] When working with addressing and information flow, I tend to spend a significant amount of time in Layers 2 and 3, which are data-link and network respectively. Layer 2, the data-link layer, refers to communication between devices on a common switched infrastructure. This layer is best known for switches and switching. Each device uses a media access control or MAC address. MAC addresses are six groups of two hexadecimal digits, usually separated by colons or hyphens, but sometimes without a separator. This layer deals only with switching so frames don't really care about the encapsulated IP addresses they are transferring. Layer 3 refers to sending information via IP addresses. This layer is best known for routers and routing. As the information passes from router to router on its way to a destination, it will use Layer 3 information to see where to forward the packet, then repeat the process until it reaches its…

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