In networking the "hop" is used a measure of efficiency. Specifically, the number of hops is equal to the number of nodes (including routers) to which (i.e. the destination) or through which a packet may be transmitted. For IPv4, the maximum number of hops that a packet may make is noted in the "time to live" field of the IPv4 header. Each router decrements the time to live by one and if the time to live reaches zero before reaching the destination, the packet is discarded. As defined in this problem, how many hops are possible using IPv4? How many hops are possible using the Ethernet protocol?