Since we've been talking about various Internet-related concepts, and since this question came up in my class last week, I thought I'd tackle the term Internet service provider (ISP). Most of us probably know what this is and, if we don't, the term is pretty self descriptive. But we also talk about ISPs in various tiers (e.g., Tier 1, Tier 2, Tier 3). This is somewhat confusing to people these days, so I'll focus on it a bit in today's PodSnack.

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