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.
It is the job of our veins to carry deoxygenated blood back to the heart. Healthy veins have valves which open and close to assist the return of blood to the heart. Venous disease (also called vein insufficiency or venous reflux), occurs if these valves become damaged, allowing the backward flow of blood in the legs.