| Case study of Technical support calls regarding network issues | 250 | |
| Cabling | 47 | This is related to cabling failures. |
| Damaged cable | 21 | Loose connectors, physical damage to the shielding or wiring |
| Does not support 10/100 | 16 | Cable is CAT-3, wires are not twisted tight enough or more the 1/2 inch |
| Distance/Placement | 10 | Depending on cable type, cable is longer then cable supports |
| Network hardware | 67 | This is related to hardware failures of configurations. |
| Damaged Hub/Switch | 19 | Failing Hub/Switch or lightning-electrical damage |
| Optimized Industry Standards | 22 | Hubs repeat all traffic to all nodes. Switches dedicate throughput & prevents collisions, |
| wrong cable type network architecture, or faulty configurations | ||
| Network card is damaged or failing | 26 | Failing Network card or lightning-electrical damage |
| Interference | 53 | This is related to outside interference. |
| Dual/Multiple grounds | 15 | Multiple electrical grounds on computer/network circuit |
| EMI/RFI | 27 | Unshielded cable, High frequency equipment, power cables, etc... near network devices |
| Electrical short | 4 | Electrical short |
| Shared circuit | 7 | Non Computer items on circuit (microwaves, welding equipment, etc...) |
| Software | 34 | This is related to software bandwidth usage. |
| Anti-Virus | 23 | Anti-virus |
| Virus | 9 | Multiple systems infected trying to infect other systems |
| PTM | 2 | Idle sensitivity in the Icon setting needs to be "high" to prevent excessive polling |
| Network Configuration | 49 | This is related to software bandwidth usage. |
| Network Protocols (Multiple) | 21 | Multiple protocols are installed slowing down traffic |
| Network General Configuration | 15 | Network is configured incorrectly |
| Network Services | 13 | Firewalls, Proxy servers, DHCP server, or other network software. |