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- Ensuring Network Security
Making Networks Secure
Maintaining a Healthy Network Environment
Avoiding Data Loss
1
- Making Networks Secure
Planning for Network Security
Security Models
Security Enhancements
Computer Viruses
2
- 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
Companion Virus
Macro Virus
Polymorphic Virus
Stealth Virus
7
- Symptoms of a Virus
The computer will not boot.
The data is scrambled or corrupted.
The computer operates erratically.
A partition is lost.
The hard drive is reformatted.
8
- Virus Protection Software
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
9
- Maintaining a Healthy
Network Environment
Computers and the Environment
Creating the Right Environment
10
- Environmental Extremes
Affect Computers
11
- Include Hidden Components
in Environmental Assessment
12
- Keeping the Computer Cool
13
- Industrial Considerations
Noise
Electromagnetic interference (EMI)
Vibration
Corrosive and explosive environments
Untrained and unskilled workers
14
- Avoiding Data Loss
Data Protection
Tape Backup
Uninterruptible Power Supply (UPS)
Fault Tolerant Systems
Optical Drives and Disks
Disaster Recovery
15
- Causes of Network Disaster
Component failure
Computer viruses
Data deletion and corruption
Fire caused by arson or electrical mishaps
Natural disasters, such as lightning, floods,
tornadoes, and earthquakes
Powersupply failure and power surges
Theft and vandalism
16
- Data Loss Recovery
Tape backup systems
An Uninterruptible power supply (UPS)
Fault tolerant systems
Optical drives and disks
17
- 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
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