4. Feel Your Fillings. Polyurethane foam is a low-cost, easy-care cushion filling. But the more durable, high-density type can feel hard, and softer, low-density foam deteriorates more rapidly with constant use. High-resilient (HR) foam is slightly more expensive but more comfortable and long-lasting.
Ping is a program that sends a series of packets over a network or the Internet to a specific computer in order to generate a response from that computer. The other computer responds with an acknowledgment that it received the packets. Ping was created to verify whether a specific computer on a network or the Internet exists and is connected. Some have claimed that the word ping is actually an acronym for Packet Internet (or Inter-Network) Groper, deliberately contrived to play on the fact that pinging with a computer is similar to what submariners do with sonar.
Traceroute tells you the exact route you take to reach the server from your computer (ISP) and how long each hop takes. DID YOU KNOW... It is often believed that Ping is an abbreviation for Packet Internet Groper, but Ping's author has stated that the names comes from the sound that a sonar makes.