The PPP and OSI protocols share the same physical layer, but PPP distributes the functions of LCP and NCP differently. PPP operates across any DTE/DCE interface. The only requirement imposed by PPP is a duplex circuit, either dedicated or switched, that can operate in either
From Wikipedia, the free encyclopedia. The cisterna magna (or cerebellomedullary cistern) is one of three principal openings in the subarachnoid space between the arachnoid and pia mater layers of the meninges surrounding the brain. The openings are collectively referred to as cisterns.he two other principal cisterns are the pontine cistern located between the pons and the medulla, and the interpeduncular cistern located between the cerebral peduncles. Cerebral spinal fluid can also be obtained by puncture of the cisterna magna (cistern puncture).
The cystic duct is between two and four centimeters long. It lies between the gallbladder and the common bile duct. It transmits bile between ducts that are important for the digestion process and the gallbladder. Usually it's found next to the cystic artery that sends oxygenated blood to the gallbladder and cystic duct. The cystic duct is an important player in the digestive process. The system needs bile to help break down food and the cystic duct transfers bile between the gallbladder and common and hepatic bile ducts....