In other words, RIP is a soft state protocol. Every route has a property called a metric, which indicates the distance to the route's destination. Every time a router receives a route advertisement, it increments the metric.
Venous reflux disease, also known as venous insufficiency, is a medical condition affecting the circulation of blood in the lower extremities. Normally, one-way valves in the veins keep blood flowing toward the heart against the force of gravity. When the valves become weak and do not close properly, they allow blood to flow backward and this is a condition called reflux.
Vesicoureteral reflux (VUR) is the condition in which urine travels backward from the bladder toward the kidney and may affect one or both ureters. In most children, reflux is a birth defect and is caused by an abnormal attachment between the ureter and bladder with a short, ineffective flap valve. In some children, an infrequent urination pattern may cause reflux to occur.