One of the big problems with solar-system wide internet is latency. Various protocols assume that there is some upper bound on latency, IP itself assumes that e

One of the big problems with solar-system wide internet is latency. Various protocols assume that there is some upper bound on latency, IP itself assumes that end-to-end latency is less than about 4 minutes (which is'n true for mars at least half of the time), with typical TCP/IP stack implementations requiring significantly less (5 seconds seems to be common requirement for TCP to meaningfully work, 15 seconds is quoted in RFC 791), things like SSL/TLS are latency sensitive enough that multi-hop terrestrial wireless connections can be a problem. Even when all these technical problems are solved (eg. by replacing the whole IPv4/6 with something completely different) there still remains the problem of the user experience completely changing.