HostDemo

local side = "top" -- Change as needed

os.loadAPI("host")
-- New DNS entry
host.new("localhost",os.getComputerID()) -- "localhost" is name

rednet.open(side)
rednet.send(host.getID("localhost"),"TEST!")
local event,id,msg = os.pullEvent()
if event == "rednet_message" then
    print("ID: "..id) -- ID given to us by rednet
    print("MSG: "..msg) -- Message
    -- Get name of ID
    print("DNS: "..host.getName(id))
    -- Name set for ID set by DNS (confirmation of it working)
    print("DNS ID: "..host.getID(host.getName(id)))
end