1. Operating Systems Concepts 1/e Ruth Watson Chapter 11 Chapter 11 Network Maintenance Ruth Watson

2. Operating Systems Concepts 1/e Ruth Watson Chapter 11 2 Objectives (1 of 2) Explain the importance of a Disaster Recovery Plan Describe a backup rotation scheme Demonstrate how to boot a computer into safe mode Explain the role of services Explain the role of service packs

3. Operating Systems Concepts 1/e Ruth Watson Chapter 11 3 Objectives (2 of 2) Explain the difference between a static and a dynamic IP address Explain what the DHCP service does Demonstrate how to use TCP/IP troubleshooting tools  PING and TRACERT Explain what the DNS service does

4. Operating Systems Concepts 1/e Ruth Watson Chapter 11 4 Introduction Maintaining the network is the primary role of a Network Administrator Troubleshooting and monitoring resources is key

5. Operating Systems Concepts 1/e Ruth Watson Chapter 11 5 Important Terms to Understand APIPA DoS attack DHCP IANA IPCONFIG NETSTAT PING TCP/IP TRACERT

6. Operating Systems Concepts 1/e Ruth Watson Chapter 11 6 Tricks of the Trade - Server Backups Disaster Recover Plan  Outlines a procedure in the event of a network failure Weekly Backups Daily incremental backups

7. Operating Systems Concepts 1/e Ruth Watson Chapter 11 7 Tricks of the Trade - Services Automatic Manual

8. Operating Systems Concepts 1/e Ruth Watson Chapter 11 8 Tricks of the Trade - Service Packs

9. Operating Systems Concepts 1/e Ruth Watson Chapter 11 9 Tricks of the Trade - Miscellaneous Monitor processes Use the task Manager Install Anti-Virus Update Anti-Virus Install Utilities

10. Operating Systems Concepts 1/e Ruth Watson Chapter 11 10 Configuring and Testing IP Addresses Computers must be configured to access the Internet A unique IP address must be assigned to every device on the Internet A Network Administrator must configure computers to use the IP addresses

11. Operating Systems Concepts 1/e Ruth Watson Chapter 11 11 Static IP Addresses Assigning IP addresses statically is the hard way Network Administrators must key in:  The IP Address  The Subnet Mask  The default Gateway  The DNS

12. Operating Systems Concepts 1/e Ruth Watson Chapter 11 12 Dynamic IP Addresses Letting the operating system automatically configure IP addresses is much easier The dynamic host configuration protocol (DHCP) service allows you to enter a range of IP addresses to obtain

13. Operating Systems Concepts 1/e Ruth Watson Chapter 11 13 Troubleshoot IP Problems - IPCONFIG IPCONFIG:  Type at command prompt or at Run to determine your IP address

14. Operating Systems Concepts 1/e Ruth Watson Chapter 11 14 Troubleshoot IP Problems - APIPA APIPA:  Automatic private IP addressing  Enables clients to communicate on a LAN without Internet access

15. Operating Systems Concepts 1/e Ruth Watson Chapter 11 15 Troubleshoot IP Problems - Ping Ping  If you cannot access the Internet, try a Ping When you Ping, you send something like an echo to the address The echo travels there and back If you do not get a reply, something is wrong with the NIC card or TCP/IUP stack

16. Operating Systems Concepts 1/e Ruth Watson Chapter 11 16 DNS Problems - TRACERT TRACERT  Trace Route Utility  Bounces and echo to the destination  Shows every router along the way

17. Operating Systems Concepts 1/e Ruth Watson Chapter 11 17 DNS Problems - Hostname HOSTNAME  Gives you information about yourself  Tells you the host name of the computer you are running

18. Operating Systems Concepts 1/e Ruth Watson Chapter 11 18 DNS Problems - NETSTAT NETSTAT  Lets you know what communication ports on your computer are in use and who is using them  Communication ports range from 0 – to 1024  Ports 135 and 139 are used by Windows

19. Operating Systems Concepts 1/e Ruth Watson Chapter 11 19 Summary Maintaining a network takes a lot of work and time. Maintenance includes:  Backup schedules  Repairs  Services  Downloading  Installing  Troubleshooting Try to troubleshoot connections problems via:  PING and TRACERT Check current IP address via:  IPCONFIG

20. Operating Systems Concepts 1/e Ruth Watson Chapter 11 20 Questions?