DNS (Domain Name System/Servers) is merely an address book for the Internet, which keeps a list of all available IP addresses. Before DNS, a plain text computer file: “hosts,” was used to map hostnames to IP addresses. The “hosts” file can still be used as an alternative […]
This is an example of a memo one could send to a potential client interested in what RIP and OSPF are and how they can help their company. Memo To: John Smith, CEO From: William Donaldson Date: 10/16/2017 Re: RIP/OSPF Information Hello Sir, As requested, […]
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 […]
Securing The Universe 
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