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 Making Networks Secure Planning for Network Security Security Models Security Enhancements Computer Viruses Training Reduces User Errors Permissions Control Access to a Resource Use Windows NT Explorer to Set Permissions Modifying Group Permissions Common File Infectors Companion Virus Macro Virus Polymorphic Virus Stealth Virus 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 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 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 Power-supply 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 Disk Mirroring Duplicates a Partition on Another Physical Disk 21 Sector Sparing or Hot-Fixing Steps 22 ...Making Networks Secure Planning for Network Security Security Models Security Enhancements Computer Viruses Training Reduces User... virus in check after it activates Maintaining a Healthy Network Environment Computers and the Environment Creating the Right Environment 10 Environmental Extremes Affect Computers 11 Include... 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