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 cisterna chyli is a dilated sac at the lower end of the thoracic duct into which the intestinal trunk and two lumbar lymphatic trunks flow.It forms the primary lymph vessel transporting lymph and chyle from the abdomen to the left subclavian vein.n the abdomen, cleansed lymph from the intestines is collected in the cysterna chyli, and, except for the upper R quadrant of the body, is collected into the thoracic duct which empties into the circulatory system through the L subclavian vein.