Most routing protocols have metric structures and algorithms that are not compatible with other protocols. In a network with multiple routing protocols, the exchange of route information and the capability to select the best path across the multiple protocols are critical.elect the Best Path. Administrative distance is the first criterion that a router uses to determine which routing protocol to use if two protocols provide route information for the same destination. Administrative distance is a measure of the trustworthiness of the source of the routing information.
Burj Khalifa in Dubai, United Arab Emirates is the tallest building in the world. Shanghai Tower in Shanghai, China is the 2nd tallest building in the world. The Abraj Al-Bait Towers in Mecca, Saudi Arabia, is the tallest hotel, and the 3rd tallest building in the world.
The world's 20 largest buildings. The Abraj Al Bait Towers in Mecca, Saudi Arabia, presently under construction is set to be largest building in the world upon completion. It will also have the largest floor area of any structure in the world with 1,500,000 square metres (16,137,600 sq ft) of floor space. The largest buildings in the world are ranked as per usable space (volume) and floor space. Here we present the world 20 largest buildings in terms of floor space. 1.