(10.1 overview of network maintenance 10.2 common network faults 10.3 ideas and tools for network troubleshooting 10.3.1 ideas for troubleshooting 10.3.2 common tools and commands 10.4 fault examples and troubleshooting methods 10.4.1 common faults in networking 10.4.2 common fault exercises and thinking problems in the use of LAN 10)