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Real Network Fixes
Plain-English fixes for internet and network problems
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Network Connectivity
Internet Not Working
2
Slow Internet Speed
2
Intermittent Connectivity
2
Packet Loss
1
DNS Problems
2
DHCP Problems
1
IP Address Conflicts
1
Network Latency
1
Switches and Routers
Cisco Switch Problems
1
VLAN Configuration Issues
1
Router Connectivity
1
Switch Port Troubleshooting
1
Routing Problems
1
PoE Failures
1
Firewall Troubleshooting
Fortinet Issues
1
SonicWall Issues
1
Cisco Firewall Issues
1
Firewall Rules and NAT
1
VPN Connectivity
1
Firewall Migration
1
Wi-Fi and Wireless
Wi-Fi Disconnecting
1
Access Point Offline
1
Weak Wireless Signal
1
Wi-Fi Heatmap and Coverage
1
Wireless Interference
1
Meraki Access Point Issues
1
Fiber Optic and Cabling
Fiber Link Down
1
Fiber High Loss
1
OTDR Troubleshooting
1
SFP Compatibility
1
Single-Mode and Multimode Fiber
1
Cat5e/Cat6 Problems
2
Ethernet Termination
1
ISP and WAN
ONT Troubleshooting
1
ISP Circuit Down
1
WAN Failover
1
Slow Gigabit Internet
2
Circuit Turn-Up
1
Demarcation Issues
1
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Network Connectivity
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IP Address Conflicts
IP Address Conflicts
Network Connectivity Troubleshooting: No Internet, Slow Speeds, Dropouts and More
Section guide
No internet, slow speeds, dropouts, packet loss, DNS, DHCP, IP conflicts and latency: what each looks like and the simple tests that find the cause.
Before you change anything
Save the current device configuration and note what you change, so you can roll back.