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.
In July 2013, China heralded the opening of the New Century Global Center, an immense 18.9-million-square-foot (1.75 million square meters) structure that many are calling the largest building in the world.
9. & 10. The Petronas Towers 1 and 2 held the record as the tallest buildings in the world from 1998 to 2004 and remain the tallest twin towers in the world. These two buildings, completed on January 1, 1996, are the landmarks of Kuala Lumpur in Malaysia.