I'm confused about what a remote memory is? Is it memory accessed over a network?
I think so. The second from the bottom is getting data from a machine that is 1 network hop away from our computer. Maybe it is a machine directly connected with our machine with cable.
The last one is like a machine in the Internet, many hops away from our computer.
The term "Remote memory" is just confusing. Anytime you interact with another system over the network, you are asking for information stored in that system's memory. I think that term is referring to any sort of remote call in a distributed system.