From the course: Cisco Certified Network Associate (CCNA) v1.1 (200-301) Cert Prep

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Examining the MAC address table

Examining the MAC address table

From the course: Cisco Certified Network Associate (CCNA) v1.1 (200-301) Cert Prep

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Examining the MAC address table

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(ethereal music) - [Instructor] In this video, we want to take a look at the MAC address table, or the CAM table, that we find in an ethernet switch. And just as a quick comparison, remember that a MAC address is made up of 48 bits, as compared to a couple of other addresses we've talked about, an IP version four address, that's 32 bits, an IP version six address, that's 128 bits. We have a MAC address that is burned into each network interface card by the manufacturer, and it's often written like you see on screen. Here have a 48-bit address written in hexadecimal notation. And a MAC address is divided into two distinct parts. The organizationally unique identifier, or the OUI, and the part of the address that is assigned by the vendor. The OUI is sometimes called the vendor code. So a vendor might be assigned one or multiple OUIs and they can use that as the first 24 bits of their MAC address that they burn into their network interfaces. And then the vendor, and by the way, this is…

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