Networking Primer – Part 5.2: Network Layer – DNS and DHCP

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We have seen in the previous section that each node in a network requires an IP address and that four part address is considerably more human readable than the underlying binary bits that it represents. Unfortunately, our meagre human brain power still has trouble with recognising and differentiating between the addresses. For the same reason, we don’t have postal addresses like this: building 1, street 52, town 34843, city 2828, region 292, country 6, we need another method of identifying the addresses of our nodes. This is done with what’s called a Fully Qualified Domain Name (FQDN). A typical FQDN looks just like the one at the top of you browser: www.bltbytes.com. These names are very easy for us to understand, but the underlying network components can’t understand them. We need a system or method for translating IP addresses to FQDNs […]