I commend the author for attempting to make this subject more approachable to people less familiar with networking, but it’s always tough to present this and un

I commend the author for attempting to make this subject more approachable to people less familiar with networking, but it’s always tough to present this and understand how much you need to explain. - zone: you can think of as an SOA, start of authority, for a set of records. For example: there is an SOA record for example.com. In addition there are NS records that express what nameservers are responsible for being the authority, trusted server, of the zone. Often zones are expressed in a single file, and loaded into the authoritative server, and it contains all the additional records for the zone, like A address records. - public: in this context probably is referring to the fact that it’s exposed and reachable from the greater internet. Often people create internal private zones that only work inside a particular network. - hop: a network hop is a router on the network, and internet. Each represents a hop, this is important for things like the TTL on a UDP packet (distinct from the TTL on a DNS record), each hop decrements the packets TTL by 1. This is really important for multicast packets. - block of IPs: generally refers to the CIDR block, which designated a routable network. 10/8 means all addresses that match 10.x.x.x, where as 10.10.1/24 is the 10.10.1.x network.