Inside / Oustide - Local / Global
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Inside Local (IL)—The IP address assigned to a host within an enterprise. This address may be globally unique, allocated out of the private address space defined in RFC 1918, or may be officially allocated to some other enterprise.
•Inside Global (IG)—The IP address of a host within an enterprise, as it appears in the Internet. These addresses are allocated from a globally-unique address space, typically provided by the ISP.
•Outside Local (OL)—The IP address of a host outside an enterprise as it appears within the enterprise. These addresses can be allocated from the RFC 1918 space if desired.
•Outside Global (OG)—The IP address of a host outside the enterprise, as it appears in the Internet. These addresses are allocated from a globally-unique address space.
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