Chapter Summary

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The following points summarize the key concepts of this chapter:

Making Networks Secure

  • Network planning must include plans for security.
  • The level of security needed depends on the size of the organization and the sensitivity of the data.
  • The two security models that keep data and hardware resources safe are password-protected shares and access permissions.
  • Merely requiring users to log on does not, in itself, ensure the security of the network.
  • The best way to assign permissions is through setting up groups. Administrators can then assign permissions to the group rather than to individuals.
  • Ways to enhance security include use of auditing, diskless computers, data encryption, and virus protection.
  • Building in virus prevention and recovery policies should be part of a network strategy.

Maintaining a Healthy Network Environment

  • When assessing network environmental conditions and requirements, it is important to consider components that are out of sight, such as wiring, as well as visible components, such as computers.
  • Controlling temperature and humidity are key factors in maintaining a user-friendly environment.
  • The accumulation of material on and around computers can lead to network failures.
  • It is important to be aware of the environmental stresses placed on hidden network components, as well as components in plain view.

Avoiding Data Loss

  • Planning for a disaster is an essential part of implementing a successful network.
  • A network disaster plan should encompass the loss of hardware and data.
  • Tape backup is the most common method of preventing data loss.
  • Loss of electrical power can causes files to become corrupted, and any data being held in RAM to be lost.
  • An uninterruptible power supply provides temporary power so that critical data can be properly stored before the network or computer goes down.
  • Fault tolerance is the automatic duplication of data to prevent loss.
  • Fault tolerant strategies are called redundant arrays of independent disks (RAID) and include disk striping and disk mirroring.
  • Sector sparing is an advanced method of fault tolerance.


MCSE Training Kit Networking Essentials Plus 1999
MCSE Training Kit: Networking Essentials Plus, Third Edition (IT Professional)
ISBN: 157231902X
EAN: 2147483647
Year: 2005
Pages: 106

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