Lecture Networking essentials plus (3 e) Chapter 10 Ensuring network security

Lecture Networking essentials plus (3 e) Chapter 10 Ensuring network security. The main contents of the chapter consist of the following Making networks secure, maintaining a healthy network environment, avoiding data loss.

Ensuring Network Security

 Making Networks Secure

 Maintaining a Healthy Network Environment

 Avoiding Data Loss

1

Making Networks Secure

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

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

 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