In buildings, backbone cabling often refers to the vertical cabling running through the rises or elevator shafts that connects the hubs and switches in each floor’s wiring closet.ĭepending on performance requirements, anticipated growth, and cost, any of the following might be suitable for backbone cabling: Collapsed backbones are used frequently for connecting departmental LANs within a single building, but less often for connecting building LANs across a campus network because of the increased distances and cabling costs.īackbone cabling should have the highest bandwidth of any cabling in your network, since backbones are used to join together hubs, switches, and routers, linking departmental LANs or subnetworks into building-wide or campus-wide internetworks. Collapsed backbones generally offer better performance because of the reduced number of hops that traffic must make when passing between departmental LANs.Ĭollapsed backbones are also easier to manage because they bring all the backbone switching and routing equipment into a single room or building. However, collapsed backbones usually have better traffic flow than distributed backbones because of the underlying star topology. The central unit can be located in the building’s main equipment room or, in a campus scenario, in the IS department’s building.ĭistributed backbones generally have a greater degree of fault tolerance than collapsed ones, because the collapsed backbone unit forms a single point of failure. The central unit is often referred to as the collapsed backbone, although this term properly describes the entire configuration. Refers to using cabling to directly join each departmental network’s main hub or router using backbone cabling to a central hub, switch, or router in a star topology (see illustration). In a typical scenario, each floor or building might have a local area network (LAN) and wiring closet containing, among other things, a main hub or router.īackbone cabling is then run between floors or buildings, connecting the main hub or router for each department into a bus-style network (see illustration). This cabling is referred to as backbone cabling, and it connects the hubs, switches, or routers of each network into a single whole. Refers to using cabling to join different departmental networks in a bus topology or mesh topology. These backbones generally fall into two basic categories: Distributed backbone: How does Backbone work?īackbones are primarily used in medium to large-sized networks, such as those occupying a building or a group of buildings on a campus. 16, 2021.Two types of backbone: distributed and collapsed. End result of the treatment of idiopathic scoliosis. Minimum 5-year follow-up of Mehta casting to treat idiopathic early-onset scoliosis. American Academy of Orthopaedic Surgeons. In: Current Problems in Diagnostic Radiology. Clinical evaluation, imaging and management of adolescent idiopathic and adult degenerative scoliosis. Adolescent idiopathic scoliosis: Management and prognosis. Adolescent idiopathic scoliosis: Clinical features, evaluation and diagnosis. National Institute of Arthritis and Musculoskeletal and Skin Diseases.
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