Recall of internet protocol
# the internet protocol (IP) is the connectionless transmission mechanism used by the tcp/IP protocol
# IP is an unreliable and connection less datagram-- a best-effort delivery service
# the term best-effort means that IP provides no error checking or tracking
# IP assumes the unreliability of the underlying layers and does its best to get a transmission through to its destination, but with no guarantees
# if reliability is important, IP must be paired with a reliable protocol such as TCP