Question Win 11 limits network speed

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If you have modem with router functions and also have a router then the modem's router function (providing DHCP IP addresses) should be disabled.

Only the router should be providing DHCP IP addressess.

Is the following line diagram correct?

ISP === (coax, DSL, fiber) ===> Modem ---->[WAN Port] Router [LAN Port] ----> [LAN Port] Office Wifi Access Point ~~~~> Wireless network devices

With other Router LAN ports -----> Wired network devices
Edit the line diagram to correct as necessary.

For example: is your PC connected to the Router via a LAN port? Is there a Wifi Access Point?

On the PC double check that only the wired network adapter is enable and that IPv6 is disabled.

Also check that the wired network adapter's Speed and Duplex is set to Auto Negotiation.

TCP is still disabled/uninstalled -correct?

IPv6 is still disabled - correct?

Run and post "ipconfig /all" to show the current configuration settings.

Also run "pathping 8.8.8.8" via the Command Prompt and post the results.
 
If you have modem with router functions and also have a router then the modem's router function (providing DHCP IP addresses) should be disabled.

Only the router should be providing DHCP IP addressess.

Is the following line diagram correct?

ISP === (coax, DSL, fiber) ===> Modem ---->[WAN Port] Router [LAN Port] ----> [LAN Port] Office Wifi Access Point ~~~~> Wireless network devices

With other Router LAN ports -----> Wired network devices
Edit the line diagram to correct as necessary.

For example: is your PC connected to the Router via a LAN port? Is there a Wifi Access Point?

On the PC double check that only the wired network adapter is enable and that IPv6 is disabled.

Also check that the wired network adapter's Speed and Duplex is set to Auto Negotiation.

TCP is still disabled/uninstalled -correct?

IPv6 is still disabled - correct?

Run and post "ipconfig /all" to show the current configuration settings.

Also run "pathping 8.8.8.8" via the Command Prompt and post the results.
Yes the diagram is correct.
I m connected with lan.
TCP is completely disabled and deleted.
IPv6 is disabled.
- "ipconfig /all" :
Windows IP Configuration

Host Name . . . . . . . . . . . . : DESKTOP-KE79J6T
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Ethernet:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GbE Family Controller
Physical Address. . . . . . . . . : 2C-F0-5D-8C-D3-F5
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 192.168.0.233(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Friday, January 12, 2024 6:50:35 AM
Lease Expires . . . . . . . . . . : Sunday, January 14, 2024 6:50:34 AM
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 8.8.8.8
8.8.4.4
NetBIOS over Tcpip. . . . . . . . : Enabled

Wireless LAN adapter Wi-Fi:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) Dual Band Wireless-AC 3168
Physical Address. . . . . . . . . : 38-68-93-5B-39-7F
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Local Area Connection* 1:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter
Physical Address. . . . . . . . . : 38-68-93-5B-39-80
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Local Area Connection* 10:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter #2
Physical Address. . . . . . . . . : 3A-68-93-5B-39-7F
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

- "pathping 8.8.8.8" :
Tracing route to dns.google [8.8.8.8]
over a maximum of 30 hops:
0 DESKTOP-KE79J6T [192.168.0.233]
1 192.168.0.1
2 192.168.1.1
3 10.0.0.1
4 10.112.112.129
5 10.220.177.110
6 72.14.216.212
7 172.253.51.33
8 142.251.65.217
9 dns.google [8.8.8.8]

Computing statistics for 225 seconds...
Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
0 DESKTOP-KE79J6T [192.168.0.233]
0/ 100 = 0% |
1 0ms 0/ 100 = 0% 0/ 100 = 0% 192.168.0.1
0/ 100 = 0% |
2 1ms 0/ 100 = 0% 0/ 100 = 0% 192.168.1.1
0/ 100 = 0% |
3 --- 100/ 100 =100% 100/ 100 =100% 10.0.0.1
0/ 100 = 0% |
4 --- 100/ 100 =100% 100/ 100 =100% 10.112.112.129
0/ 100 = 0% |
5 --- 100/ 100 =100% 100/ 100 =100% 10.220.177.110
0/ 100 = 0% |
6 17ms 0/ 100 = 0% 0/ 100 = 0% 72.14.216.212
0/ 100 = 0% |
7 17ms 0/ 100 = 0% 0/ 100 = 0% 172.253.51.33
0/ 100 = 0% |
8 --- 100/ 100 =100% 100/ 100 =100% 142.251.65.217
0/ 100 = 0% |
9 15ms 0/ 100 = 0% 0/ 100 = 0% dns.google [8.8.8.8]

Trace complete.
 
DHCP lease time now 48 hours - should not be a problem.

0 DESKTOP-KE79J6T [192.168.0.233] ----> Your PC being provided a DHCP IP address = 192.168.0.233 by a router with an IP address 192.168.0.1

1 192.168.0.1 -----> Should be your TP LINK Archer AX 50 Router
2 192.168.1.1 -----> IP address is an IP address typically used by many other make and model routers.
3 10.0.0.1 -----> Also an IP address commonly used other make and model modems and routers.

If the line diagram is correct then the wireless access point should be configured with a static IP address via the router 192.168.0.1 (The Archer AX 50).

Make and model Wireless Access Point? Is it using a wired connection to the TP LINK Archer AX 50, or a wired connecton to some other device? Or simply just a wireless connection ? However, the Wireless Access Point should have been set up and configured with an interim wired connection.,

My sense if that there is misconfiguration within the network.

Two immediate things to be done:

1)

Sketch out your own network diagram showing all components and connections (both wired and wireless). Lable each device with make, model, IP address, and MAC. Show how that device is connected to all other devices. Scan or photograph so it can be posted here via imgur (www.imgur.com)

Or, starting with the line diagram, just spread it out so each network device is still shown but there is room to indicate and add the device details....

Take a few minutes to trace (follow) all wires. Port connections WAN/LAN and port # are important.

2)

Run and post the results of "arp -a" again. The results can be used to identify/confirm devices via the listed MACs/Physical Addresses. It also reveals which devices are static IPs and dynamic IPs.

Also log into the router and look for a list of connected devices. If possible turn all devices on beforehand.

Note: you should not need to use TP Links URL to log into the router. Just use 192.168.0.1 to do so. You wil be, or should be, prompted to the applicable login name and password.

Specifically look for the list of Online Devices Table via Access Controls.

https://www.tp-link.com/us/user-guides/archer-ax50_v1/chapter-9-network-security#ug-sub-title-1

Again be sure to confirm that I found the applicable router User Guide.