Ensuring Network Security

slurpslapoutNetworking and Communications

Nov 20, 2013 (3 years and 10 months ago)

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Ensuring Network Security


Making Networks Secure


Maintaining a Healthy Network Environment


Avoiding Data Loss

1

Making Networks Secure

2


Planning for Network Security


Security Models


Security Enhancements


Computer Viruses

Training Reduces User Errors

3

Permissions Control

Access to a Resource

4

Use Windows NT Explorer

to Set Permissions

5

Modifying Group Permissions

6

Common File Infectors

7


Companion Virus


Macro Virus


Polymorphic Virus


Stealth Virus

Symptoms of a Virus

8


The computer will not boot.


The data is scrambled or corrupted.


The computer operates erratically.


A partition is lost.


The hard drive is reformatted.

Virus Protection Software

9


Warns of a potential virus


Keeps a virus from activating


Removes a virus


Repairs some of the damage that a virus has caused


Keeps a virus in check after it activates

Maintaining a Healthy

Network Environment

10


Computers and the Environment


Creating the Right Environment

Environmental Extremes

Affect Computers

11

Include Hidden Components

in Environmental Assessment

12

Keeping the Computer Cool

13



Industrial Considerations

14


Noise


Electromagnetic interference (EMI)


Vibration


Corrosive and explosive environments


Untrained and unskilled workers

Avoiding Data Loss

15


Data Protection


Tape Backup


Uninterruptible Power Supply (UPS)


Fault Tolerant Systems


Optical Drives and Disks


Disaster Recovery

Causes of Network Disaster

16


Component failure


Computer viruses


Data deletion and corruption


Fire caused by arson or electrical mishaps


Natural disasters, such as lightning, floods,
tornadoes, and earthquakes


Power
-
supply failure and power surges


Theft and vandalism

Data Loss Recovery

17


Tape backup systems


An Uninterruptible power supply (UPS)


Fault tolerant systems


Optical drives and disks

Reduce Network Traffic by

Backing Up to a Separate Segment

18

UPS as Backup Power Source

19

Disk Striping Combines

Areas on Multiple Drives

20

Disk Mirroring Duplicates a
Partition on Another Physical Disk

21

Sector Sparing or

Hot
-
Fixing Steps

22