PC FieldnotesIdentify the exact adapter before choosing a driver.
These starting checks use published documentation. They are not a diagnosis of your hardware.
| ID | Title | Summary | Status |
|---|---|---|---|
| A-a7e0395c | Receive and Transmit Buffers: What Value to Use? | What Receive Buffers and Transmit Buffers mean on Windows 11, why driver units and defaults matter, and how to compare and undo one setting change. | Published |
| A-10e54680 | Speed & Duplex in Windows 11: Auto or a Fixed Value? | What Speed & Duplex controls in Windows 11, why Auto Negotiation is usually right, how fixed settings must match the port, and how to undo a change. | Published |
| A-e623303c | Public or Private Network in Windows 11: Which Should You Use? | Choose Public or Private for a Windows 11 connection by checking trust and local sharing needs. Keep firewall rules, discovery and permissions separate. | Published |
| A-9a1fcf0e | Receive Segment Coalescing: On or Off in Windows 11? | Check RSC enabled and operational states separately in Windows 11. Read adapter and global settings, then interpret receive counters before testing a change. | Published |
| A-149171d0 | ARP and NS Offload: On or Off for Windows 11 Sleep? | Learn how ARP and NS offload handle IPv4 and IPv6 neighbor requests during low-power operation. Separate offload from wake settings before testing one change. | Published |
| A-01c062f8 | Priority & VLAN: On or Off for a Windows 11 Ethernet Adapter? | Understand Priority & VLAN tagging, distinguish it from VLAN membership, and check Windows 11 driver support before changing an Ethernet adapter's original setting. | Published |
| A-9a1d4e2e | Ethernet Flow Control: On, Off, or Rx/Tx Enabled? | Understand Ethernet Flow Control Rx/Tx settings, check Dell dock exceptions, and compare one change while preserving the original Windows 11 adapter value. | Published |
| A-5962fad7 | TCP and UDP Checksum Offload: On or Off in Windows 11? | Read individual IPv4, TCP, UDP and Rx/Tx offload settings. Plan a controlled comparison and restore mixed starting values without treating a capture warning as a fault. | Published |
| A-e8babc91 | Wireshark Incorrect TCP Checksums: Check Offloading First | Separate local checksum-offload artifacts from a real network fault. Check traffic direction, partial checksums, and what Wireshark validation proves. | Published |
| A-729a1b29 | Large Send Offload v2: On or Off in Windows 11? | Read IPv4 and IPv6 LSO states before changing an adapter. Understand TCP segmentation, MTU limits, and how to preserve a mixed starting configuration. | Published |
| A-7575dacc | Jumbo Frames in Windows 11: Check MTU Before Enabling | Keep Jumbo Frames off until the LAN path supports them. Compare the NIC setting, Windows IP MTU and IPv4 probe size before changing a NAS connection. | Published |
| A-38925ce3 | Receive Side Scaling: On or Off in Windows 11? | Read the actual RSS state, distinguish receive queues from CPU limits, and preserve your adapter settings before comparing a change on Windows 11. | Published |
| A-75689403 | Interrupt Moderation: On or Off on Windows 11? | Understand the CPU trade-off, separate Interrupt Moderation from the Rate control, and compare one setting without promising a lower gaming ping. | Published |
| A-33010071 | Energy Efficient Ethernet: On or Off in Windows 11? | Check what Energy Efficient Ethernet does, when a one-setting comparison is justified, and how to restore the value you recorded before changing it. | Published |
| A-c8534591 | Ethernet Keeps Disconnecting in Windows 11: Catch the Drop First | Ethernet drops for seconds, then reconnects? Compare link status, port lights, dock devices and gateway access before changing drivers or settings. | Published |
| A-a44d8d3d | What Does Link Speed Mean in Windows 11? | Understand Windows 11 link speed, 1000/1000 Mbps and the Aggregated label. Read receive/transmit values and see why they differ from internet speed. | Published |
| A-ca58114a | Microsoft LLDP Protocol Driver On or Off? Adapter Bindings | Turning off LLDP is not an established gaming optimization. Check Multiplexor and other Windows adapter bindings, and keep your known working settings. | Published |
| A-7aff4027 | Ethernet Port Has No Lights on a Windows PC | Check model-specific Ethernet LED meanings, compare a working cable and LAN port, and distinguish a missing link from Windows adapter or IP problems. | Published |
| A-e37c317c | Ethernet Not Working but Wi-Fi Works in Windows 11: Compare the Two Paths | If Ethernet is not working but Wi-Fi works in Windows 11, compare link state, IP address, gateway, cable, port, adapter, and driver in order. | Published |
| A-bb2d69b0 | Wi-Fi and Ethernet Both Not Working? Windows 11 First Checks | Both connections down on one Windows 11 PC? Test another device on the same router first, then IP, gateway, VPN, and dock before you use Network reset. | Published |
| A-ef15aee7 | Ethernet Not Working After Sleep in Windows 11 | Check the adapter, cable link, IP address and DNS after Windows 11 wakes from sleep, with separate paths for built-in Ethernet and USB C docks. | Published |
| A-d4bd0a34 | 169.254 IP Address on Windows 11 Ethernet | Windows 11 Ethernet showing a 169.254 IP address? Identify the active adapter, confirm DHCP, and compare the cable, LAN port, and router before resetting. | Published |
| A001 | Ethernet Capped at 100 Mbps on Windows 11 | Ethernet capped at 100 Mbps on Windows 11? Check link speed, compare cables and LAN ports, and verify Auto Negotiation before replacing hardware. | Published |
| T001 | Guided Ethernet check | Use the link speed Windows reports to choose your next check. | Guided check |