Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Qenya 

natse

noun. web, net, web, net[work]

A noun in The Etymologies of the 1930s glossed “web, net” under the root ᴹ√NAT “lace, weave, tie” (Ety/NAT).

Neo-Quenya: There are later words for “[spider’s] web” (ungwë) and “[physical] net” (raima or rembë), but I would retain natse for a more general sense “web, net[work]” applying to any interlacing of connected things (physical or metaphorical). This allows the retention of several early neologisms having to do with the internet.