Port Security is a traffic control feature on Cisco switches that operate in layer 2. It allows an administrator to configure specific switch ports to permit only a specified number of source MAC addresses. One of its primary uses is to prevent “dumb” switches to be added to […]
What is IPv6 IPv6 addresses use 8 sets of 4 hexadecimal addresses separated by a (:) colon. There are 16-bits in each set. An excellent example of an IPv6 Address would be fe80::2000:aff:fea7:f7c. The /64 bit on the end is from the IPv4 days and is called […]
APIPA (Automatic Private IP Addressing) is a DHCP fail-over instrument used with IPv4 (Internet Protocol Version 4). APIPA is envisioned for use in non-routed business environments with less than 25 clients being ideal. It is supported by all modern versions of Microsoft Windows. By using APIPA, DHCP clients […]
Securing The Universe 
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