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.
December 02, 2015. You enjoy listening to the purr of the engine as you cruise along the highway. When you hear some strange sound coming from under your hood, you may panic. A knocking sound can be worrisome, and here is what it might mean and what you should do. Knocking in your engine, also described as pinging, can mean one of several problems. Some may be easily fixed while others may indicate major damage.