The Importance Of Standards And Structured Cabling For Data Centre
The importance of standards revolves around the fact that they are needed to help manage multi-protocol corporate networks. The most important standards bodies for computer networks are: CCITT, ITU, ISO, ANSI and IEEE. Of particular significance is the OSI (Open System Interconnection), an ISO project dating from the late '70s, which is proposed as a reference model for networks. It presents an approach to 7 levels (layers) with a series of protocols which are inserted at various levels. Layers 1 (Physical Layer) and 2 (Data Link Layer) is now standard while the other 5 are protocols that have long existed and are struggling to impose standards.
The harness consists of the physical plant (cables, connectors, patch panels, infrastructure support) that allow the creation of a network of computers, typically within a building or group of buildings. These are obviously points that you will have to include in your data centre design. The electrical characteristics and the lengths of cables and connectors used influence the types of local networks that are feasible. Among the first examples of wiring that may be cited are the first Ethernet networks (called 10Base5, thick cable) made of thick copper coaxial cables in which computers would be connected by perforating the outer sheath to reach the internal connector. These wires had a bus topology. Modern buildings created for offices are made of structured cabling systems intended to support the realisation of different types of local area networks including the telephone network. The systems are based on Category 5 or higher and RJ-45 connectors. The cables have a maximum length of 90 m with a further 10 m for cables of exchange.
This constraint is dictated by the characteristics of the Ethernet network. For each location to be served, one or more cables are laid in special ducts in the walls, ceilings or floors of the building to reach a distribution cabinet of the plane (in the jargon of the structured cabling, Floor Distributor or FD).Usually it is a standard 19 inch rack which can accommodate both active equipment and patch panels. These cables are certified by a party in a patch panel in the closet the other in a plaque on the wall or floor near the user position. By connecting a cable from the computer trade-in to a wall outlet and another from the distribution frame to a network device (like a hub or a switch), it creates an electrical connection that allows you to connect your computer to the network. In case the dimensions of the building are not able to serve all users with a single FD, the various FD are connected to a cabinet of that building, (Building Distributor, BD), by means of copper cables and / or optical fibre cables, even those certificates in patch panels. Similarly the different buildings of a campus are connected to a locker patch of campus or Campus Distributor, CD. The rooms housing the cabinets should have characteristics suitable for power supply (preferably protected by a UPS), air conditioning and access control (or are privileged places for intruders to cause network failures).
The harness consists of the physical plant (cables, connectors, patch panels, infrastructure support) that allow the creation of a network of computers, typically within a building or group of buildings. These are obviously points that you will have to include in your data centre design. The electrical characteristics and the lengths of cables and connectors used influence the types of local networks that are feasible. Among the first examples of wiring that may be cited are the first Ethernet networks (called 10Base5, thick cable) made of thick copper coaxial cables in which computers would be connected by perforating the outer sheath to reach the internal connector. These wires had a bus topology. Modern buildings created for offices are made of structured cabling systems intended to support the realisation of different types of local area networks including the telephone network. The systems are based on Category 5 or higher and RJ-45 connectors. The cables have a maximum length of 90 m with a further 10 m for cables of exchange.
This constraint is dictated by the characteristics of the Ethernet network. For each location to be served, one or more cables are laid in special ducts in the walls, ceilings or floors of the building to reach a distribution cabinet of the plane (in the jargon of the structured cabling, Floor Distributor or FD).Usually it is a standard 19 inch rack which can accommodate both active equipment and patch panels. These cables are certified by a party in a patch panel in the closet the other in a plaque on the wall or floor near the user position. By connecting a cable from the computer trade-in to a wall outlet and another from the distribution frame to a network device (like a hub or a switch), it creates an electrical connection that allows you to connect your computer to the network. In case the dimensions of the building are not able to serve all users with a single FD, the various FD are connected to a cabinet of that building, (Building Distributor, BD), by means of copper cables and / or optical fibre cables, even those certificates in patch panels. Similarly the different buildings of a campus are connected to a locker patch of campus or Campus Distributor, CD. The rooms housing the cabinets should have characteristics suitable for power supply (preferably protected by a UPS), air conditioning and access control (or are privileged places for intruders to cause network failures).
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