Definitions Edit

Hardware Edit

A sector on a disk was an early method for giving addresses to each physical block of data on a hard disk drive. It is the smallest logical component of a hard drive that can be read or written. Many hard drives have 512-byte sectors. Even if a single byte of data needs to be accessed, the hard drive will read the entire sector containing that data.

Infrastructure Edit

A sector is

[a] group of industries or infrastructures which perform a similar function within a society.[1]

Security Edit

A sector is

a logical collection of assets, systems, or networks that provide a common function to the economy, government, or society. The NIPP addresses 18 CIKR sectors, identified by the criteria set forth in HSPD-7.[2]

References Edit

  1. Critical Foundations: Protecting America's Infrastructures, Glossary.
  2. National Infrastructure Protection Plan, at 111.
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