February 2019
Intermediate to advanced
626 pages
15h 51m
English
Content preview from Mastering Windows PowerShell Scripting - Third Edition
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MAC addresses
Media Access Control (MAC) is a unique identifier for network interface addresses with 6-byte fields normally written in hexadecimal.
Tools such as ipconfig show the value of a MAC address with each hexadecimal byte separated by a hyphen, for example, 1a-2b-3c-4d-5f-6d.
Linux or Unix-based systems tend to separate each hexadecimal byte with :, such as 1a:2b:3c:4d:5f:6d. This includes Linux and Unix variants, VMWare, JunOS (the Juniper network device operating system, based on FreeBSD), and so on.
Cisco IOS shows a MAC address as three two-byte pairs, separated by a period (.).
A regular expression can be created to simultaneously match all of these formats.
To match a single hexadecimal character, the following character class ...
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