The most important thing to learn about the OSI model is what it really represents. Pretend you're an operating system on a network. Your network card, operating at layers 1 and 2, will notify you when there's data available. The driver handles the shedding of the layer 2 frame, which reveals a bright, shiny layer 3 packet inside (hopefully).
Used with permission. Agate is a variety of chalcedony, a cryptocrystalline form of quartz. Translucency, patterns of color, or moss-like inclusions may distinguish this stone from other forms of chalcedony. Agates can show a wide variety of vivid, multiple colors.
Placed on the abdomen or used as an elixir, Agate stimulates the digestive system and relieves gastritis. It is beneficial for the eyes, hollow organs such as the stomach, uterus, intestines, etc., and heals skin disorders and itching due to insect bites.