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I see that in ccna book the representation of a virtual MAC address is by for example :- 0000.0c07.ac0a Somewhere else it is, 00:00:0c:07:ac:0a. In cmd it is, 00-00-0c-07-ac-0a.

Does this mean there is no specific way to represent it ?

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    Feb 19, 2018 at 20:03

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The MAC address in this case is actually 00000c07ac0a, the representation is just a way of formatting the MAC address so it can be easily read, and it can vary depending on what command you are using. The actual address doesn't have any separators (: - or .). There isn't a common standard way to represent the address, they are all interchangeable.

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