![]() The term “backbone” is also used to refer to the collection of networking components (cabling, hubs, switches, and routers) that form the supporting network into which workgroup and departmental LANs are connected and joined together. Single-mode fiber-optic cabling ( get single-mode fiber optic cables) Backbone as a collection of networking components.Multimode fiber-optic cabling ( get Multimode duplex ST-ST fiber optic 2 meters).Thinnet coaxial cabling ( get BNC Thinnet Coax Cable Black 50 feet).Type 1A STP cable ( get Cat 7 Ethernet STP cable 50ft black).Cat5 UTP cable ( get Cat5E 1000ft from Amazon).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. This paper discusses the technologies developed by NEC aimed at building high-capacity, high-reliability optical networks and the SpectralWave DW7000 - multilayer integrated transport system.Two types of backbone: distributed and collapsed. To address these issues, NEC has been proceeding with the deployment of solutions using high-capacity optical communication technology and high-capacity switching technology composed of layers of wavelength division multiplexing (WDM) in L0, optical transport network (OTN) in L1, and packet in L2, as well as transport software-defined networking (SDN). At the same time, there is growing demand for robust systems with high fault tolerance that can provide uninterrupted communications under even the most adverse conditions, while keeping capital expenditures (CAPEX) and operating expenditures (OPEX) to a minimum, to provide the communication services as one of most critical form of social infrastructure. ![]() The rapid popularization of high-definition movie distribution services and social networking services in recent years has led to the need for an increase in the capacity of the transport systems that support telecommunication backbone networks.
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