Page 685 - (ISC)² CISSP Certified Information Systems Security Professional Official Study Guide

Entrance facility: Also known as the demarcation point, this is the
entrance point to the building where the cable from the provider

connects the internal cable plant.

Equipment room: This is the main wiring closet for the building,
often connected to or adjacent to the entrance facility.

Backbone distribution system: This provides wired connections
between the equipment room and the telecommunications rooms,
including cross-floor connections.

Telecommunications room: Also known as the wiring closet, this

serves the connection needs of a floor or a section of a large
building by providing space for networking equipment and cabling
systems. It also serves as the interconnection point between the
backbone distribution system and the horizontal distribution
system.

Horizontal distribution system: This provides the connection
between the telecommunication room and work areas, often

including cabling, cross-connection blocks, patch panels, and
supporting hardware infrastructure (such as cable trays, cable
hangers, and conduits).

Server Rooms/Data Centers

Server rooms, data centers, communications rooms, wiring closets,

server vaults, and IT closets are enclosed, restricted, and protected
rooms where your mission-critical servers and network devices are
housed. Centralized server rooms need not be human compatible. In
fact, the more human incompatible a server room is, the more
protection it will offer against casual and determined attacks. Human
incompatibility can be accomplished by including Halotron, PyroGen,
or other halon-substitute oxygen-displacement fire detection and

extinguishing systems, low temperatures, little or no lighting, and
equipment stacked with little room to maneuver. Server rooms should
be designed to support optimal operation of the IT infrastructure and
to block unauthorized human access or intervention.

Server rooms should be located at the core of the building. Try to avoid