router
Routers Network + guide to network .... page no. 276
The folowing 3 devices generate heat:hard disks, memory, and CPU's
Gateway...
no
Gateway
yes
Gateway
One can purchase SIP gateway devices from Amazon where they cost around $200. They are also available to buy both used and new from the online site Auction.
default gateway
Gateway network device
If I am reading your question correctly, I would imagine it is because the computer is not on the same network... **The computer has an invalid default gateway address**
default gateway