MCSA/MCSE 70-291: Domain Naming System Concepts
Introduction
When internetworking was first conceived and implemented in the 1960s and 1970s, the Internet Protocol (IP) addressing scheme was also devised. It uses four sets of 8 bits (octets) to identify a unique address, which is composed of a network address and a unique host address. This provided enormous flexibility because this scheme allowed for millions of addresses. The original inventors of this system probably didn’t envision the networking world as it is today—with millions of ...
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