The key to manufacturing Premier Silver status is to manufacture Marriott Platinum status. The reason for this is that United and Marriott have a partnership called RewardsPlus (found here). With RewardsPlus, Marriott Platinum members can sign up to get complimentary United MileagePlus Premier Silver status.
A backbone is a larger transmission line that carries data gathered from smaller lines that interconnect with it. 1) At the local level, a backbone is a line or set of lines that local area networks connect to for a wide area network connection or within a local area network to span distances efficiently (for example, between buildings). Download this free guide.
In the collapsed backbone shown on the right, a cable runs from each department (or floor) network to a central hub or switch, usually located in a building wiring closet or management center. The backbone is reduced to a hub or switch and the network is configured with a star-wired topology.The hub or switch uses a variety of architectural designs, such as bus, shared memory, or matrix-as discussed under  Switch Fabrics and Bus Design ..he backbone is reduced to a hub or switch and the network is configured with a star-wired topology. The hub or switch uses a variety of architectural designs, such as bus, shared memory, or matrix-as discussed under  Switch Fabrics and Bus Design ..