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).
Renal cyst is a fluid-filled sac, which also have blood vessels on the walls of the cyst. When the cyst grows to a certain size, it will be under the pressure of the the surrounding organs or tissues. That can lead to the burst of blood vessels. Thatâs one reason why hemorrhagic renal cysts are found. The other cause may be surgery. People want to shrink the big renal cysts by surgery. However, when the doctor perform a surgery, they may cause trauma on the cyst, which lead to a hemorrhagic cyst. Hemorrhagic renal cyst is serious. If the fluid inside the cyst was infected, then a cyst hemorrhage could lead to sepsis. And you should let your doctor to have a test to find the real cause and take timely treatment to stop the bleeding.