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.
Answer Wiki. Here's what caused it... you noticed it. Veins of this caliber are translucent. Venous blood is deoxygenated and very dark red in color, unlike the bright red of oxygenated arterial blood. If you look at your skin you can see the larger superficial veins underneath, and they look sort of blue.