tailieunhanh - Lecture Networking essentials plus (3/e) - Chapter 10: Ensuring network security

Chapter 10 examines the information requirements of a project and the need for monitoring critical activities. Included in this chapter is a description of some common project management information systems (PMIS). | Lecture Networking essentials plus 3 e - Chapter 10 Ensuring network security 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 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