A network interface controller (also known as a network interface card, network adapter, LAN adapter and by similar terms) is a computer hardware component that connects a computer to a computer network.

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local area connection doesn't have a valid ip configuration

I get the following error after running diagnostic tool: local area connection doesn't have a valid ip configuration then I ran ipconfig \all in cmd and got the following: Microsoft Windows [Version ...
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How can I see which wifi channel is used by my laptop with Windows 8? [duplicate]

How can I see which wifi channel is used by my laptop with Windows 8 ?
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226 views

Windows 7 routing with single NIC

I have a PC with single NIC running windows 7. This PC is a member of 180.x.x.0/24 network and is internet accessible. Now, my brother brought another PC with single NIC. I want to make it also ...
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Server with 2 NICs

The server has a motherboard with built-in NIC that has 2 Ethernet ports. 1st labeled Management, 2nd isn't labeled anything. 2nd NIC is a PCI card plugged into the motherboard, which has 1 Ethernet ...
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28 views

Writing a script for a multi network student lab to change networks

I work in a university/college and having a problem in one of the labs. At the moment we have a few programs that pull their licences from a licence server. This licence server has no internet ...
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2answers
94 views

How can I do to my PC see its network adapter?

I have installed the Windows-7 on my computer. My PC doesn't see the wifi connections, because the Windows did not detect a properly installed network adapter. I entered the "Change adapter settings" ...
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1answer
877 views

Killer LAN e2200/Atheros AR8161 not running at Gigabit

I have ASRock Fatal1ty 990fx Killer that has the Atheros AR8161 NIC (branded as Killer LAN). I'm direct connecting to a Motorola SurfBoard 6141 with Cat5e cabling. My Windows 7 Professional is set to ...
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368 views

Two network drivers? (Broadcom Network Adapter, and Killer e2200 Controller)

This is making me very confused, I have an alienware laptop, and when I went to the Dell website to download drivers, I found a Broadcom Network Adapter/Bluetooth Combined driver, and a Killer e2200 ...
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437 views

Automatically connect WAN Miniport (SSTP) adapter at login

I have a WAN Miniport (SSTP) Adapter which I want to automatically connect when I log on. It authenticates using a certificate in the local users certificate store, no password required. When I ...
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63 views

Service Network Restart

I was configuring the network interface for the servers that are on Centos 6 platform. While editing the ifcfi-eth0 file there is a field "ONBOOT" which is set to "yes" if we want that the network ...
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33 views

Wifi problems - stops responding

I have problem with my WiFi. When I turn on my PC, everything is going fine, but in some time, My WiFi stops responding and connection is lost. After aprox. 1 minute is connection back, but it's ...
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77 views

What is the use of VmWare Virtual network adapters

I had VmWare Workstation for times ago and one day I noticed that my laptop is not going to shutdown or hibernate or sleep normally and it got stock turned on and with screen turned off which I had to ...
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66 views

Loopback vs NIC path

I'm trying to troubleshoot a complex problem in my computer running Windows 7. I won't describe the problem as it would take a very long time to explain. Basically I'm running a software that connect ...
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206 views

What is the effect of Service Network Restart

In network configuration file ifcfg-eth0 . There is a field "onboot" if I put onboot=no and restart the service network. Then interface eth0 did not up. If I put onboot=yes it does up the interface ...
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2k views

Use Genymotion/Andy without Host-Only Network Adapter?

Genymotion and Andy require Virtualbox Host-Only Network Adapter, however my computer is unable to install the driver correctly. Note that Android x86 works well with default NAT network settings. ...
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2answers
1k views

Change Network Type for Adaptor (Public vs Private)

I'm working on Windows 8.1 Professional. The machine is currently configured "Private" in a place that should be "Public". In its docs, Microsoft refers to this as "Public Mode" and "Private Mode" (...
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1answer
233 views

HP 6910p battery charging very slowly

My laptop battery charge rate is very slow. It charges between 50% - 100% in almost 4, 5 hours. It's running normal on AC adapter without any problem but running very slow on battery mode. So can one ...
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3answers
4k views

VirtualBox Network Adapter fails to install

The Host-Only Adapter fails to install in Windows 8.1 x64 with VirtualBox-4.3.20-96997. When VirtualBox is installed, Host-Only appears in the Device Manager as a failed device. Therefore Host-...
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242 views

Link speed says 1Gbps but is actually only 100Mbps

I've been transfering files across my network but seeing some things I don't understand. When I view my network adapter Link speed it states that it is 1Gbps but when viewing the network details in ...
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1answer
967 views

Windows 7 computer randomly loses IP configuration

Title says it all. I recently got a new computer with Windows 7 and it randomly loses its IP configuration. Its IP configuration is all valid and works properly after it boots, but it can randomly ...
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Optimal setting for advanced parameters for Realtek PCI-e GBE family network card

superusers. I am trying to get the best possible setting for my Realtek PCI-e GBE family controller network card so that when it will be literally minimal or zero lag when playing online game. (...
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1answer
140 views

How to identify which USB devices are mapped to what network interface names?

When I plug in an USB network, it gets assigned a network name, like wlan1 by udev. Is there a way how to determine the mapping, without going through udev files, like /etc/udev/rules.d/70-persistent-...
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Is there a way to make a usb NIC show up in the wifi dropdown on a Macbook Pro 15?

I purchased a USB NIC (Alfa AWUS036AC) because the onboard NIC on my 2014 MBP 15 and my Netgear router don't play nice with each other. Is there a way I can make the networks it (the new NIC) sees ...
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70 views

Intel WLAN NIC works in Linux, undetected in Windows 7

Note: I do not have the hardware in question in front of me at the moment, so I'm sorry for the unavailability of some information. I understand if I can't get a proper answer because of that. ...
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91 views

Internet access without NIC card?

If have a USB modem dongle for INTERNET connection. Can i access INTERNET from a brand new desktop/laptop without NIC card using this dongle? I feel that the dongle is just a modem ( with a DHCP ...
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brand new hp pavilion 500 has very weak wifi signal

So i just bought a new Desktop computer : Specs : Model: HP 500-280ef Cpu : intel i7 4770,3.8ghz,8mo cache GPU : nVidia 750 2Gb DDR5 RAM : 8Gb Os : win 8.1 Wireless ...
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720 views

dell latitude e6540 e port plus ii network adapter not working

I own a Dell latitude e6540 and a E-port plus IIdell latitude e6540 e port plus ii network adapter does not work. What is happening is that, the network adapter for the port replicator is not working. ...
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1answer
277 views

How to optimize LAN connection between two home computers

I'm trying to figure out how to optimize the connection between my home computers. Both have Intel CT Gigabit PCI-e network adapters using Jumbo packets, etc (both PCs are setup the same). I'm using ...
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210 views

netperf udp with small packets on 10g link is bounded by ksoftirqd

I want to fill a 10Gbps link with very small udp packets (64B). I use the following command for i in 1 2 3 4 5 6 7 8; do netperf -H 192.168.56.2 -p 12865 -t UDP_STREAM -l 60 -C -c -- -m 64 -s 16M -...
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607 views

(Too) Many network adapters, why?

As shown in the image, I have VMware and Juniper Network installed, but there are still too many TAP-Windows Adapter or TAP-Win32 Adapter. What are these connections? How can I remove these?
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1answer
296 views

Using iw to decrease the txpower of a wireless nic

Any search on the internet reveals only how to increase your tx power, and only by changing your region. What I want to do is programmatically decrease (and increase) the tx power of my card but using ...
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Is there a way in windows to force/encourage a program to use a specific NIC (not as a developer)

I have multiple network cards, and can use more than one of them to connect to the internet. It is simple to force connections to a specific target IP to go through a specific NIC, using the route ...
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Problems external pinging second interface on two NIC two subnet Windows 7

I have this configuration working fine with Linux, but Windows puts up a nasty fight. The Windows 7 box is setup with two NICs, each for a separate subnet. NIC 1 is the primary interface and has ...
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1answer
324 views

How to route traffic from NIC1 to NIC2 when both NIC's are in different subnets?

I am implementing anycast ip on multiple servers which have 2 NIC's installed NIC 1 is connected to the production LAN with a subnet and a Default Gateway (automatic registration in DNS enabled for ...
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249 views

Windws - DNS for two NICs - one with hosted network

Hi I have a PC that runs a small web app (wamp based) and invites the user to take it's smartphone to use it. For that we use 2 wireless connections; - built-in: The wifi card with windows 'wireless ...
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84 views

NIC Remains Active After shutdown

Windows 8.1 during shutdown the ethernet adapter light goes out but comes back on after a second. Power is off but the adapter light is on and there is link activity. This does not happen in sleep ...
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Intel 10Gbps card bandwidth

I have an Intel 10Gbps card that has the 82599 10GbE Controller. The card has two ports in it. The datasheet of the controller says it supports PCIe 2.0 (2.5 GT/s or 5.0 GT/s) Now, according to PCIe ...
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390 views

How to configre network card on centos?

I have a fresh install of Centos on a machine with two NICs, one built-in and another one installed in PCI slot. However in the network settings I get one shown as wired connection picking up IP from ...
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532 views

Single external antenna on multi-antenna WiFi n-enabled network card

I want to buy a PCI WiFi card, that supports networks in n standard (TP-LINK TL-WN851ND). It has two antennas, and it supports MIMO feature (yet I don't know if it's the standard one, or propertiary). ...
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1answer
101 views

definitively determine the primary physical LAN port (device0)

Is the device with the lowest DeviceID a reliable way to find the first LAN port on a machine with 2 ports? I have been searching for a way to deterministically get the first LAN port across our ...
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1answer
153 views

Need help understanding network interfaces on my machine

I do not understand why wireshark and the device list on my computer do not show the same set of network interfaces. Also, I am not even sure what some of the interfaces are. Here are the reports: ...
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239 views

Intermittent connection drops on Win 8.1

This is a laptop system. I currently have an issue where my network connection will drop intermittently for anywhere between 5-15 seconds at a time. This is enough to disconnect me from anything I'm ...
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1answer
381 views

adding a nic to a linux system

I've just bought an HP NC360T Dual Port Gigabit Ethernet Adapter PCI-E for use in a linux box. I can't seem to see the device on the system. I've used the lspci command to display a list of items on ...
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Windows 7 network adapter fails to start

I need to restart my Windows 7 computer at least 3-4 times to get my local area connection active. I have tried every option related to power but it hasn't helped. I have the drivers installed, but it ...
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0answers
73 views

I want backdoor access via intranet but none via internet - easy solution?

I see my new server has two cards and wonder if I can plug the internet into one and an intranet into the other. I only want access to the OS and program files and MySQL from the intranet side. ...
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1answer
147 views

Is there any way to determine if the router is forwarding WoL packet to the NIC card while the computer is turned off?

I am having hard time figuring out whether the problem is with the router not forwarding the packets to the NIC OR the problem is the NIC not waking the PC or other hidden settings that are preventing ...
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I have LOTS of TAP-Win32 Adapter OAS and TAP-Windows Adapter V9

What are these, and what are they used for; how do I get rid of this? Because I haven't got OpenVPN or any other VPN-client installed on my computer (to my knowledge). I am not sure but I thing this ...
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2answers
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Why does Firefox not auto-detect the proxy after upgrading to version 31?

My Firefox cannot detect the proxy any more after upgrading it to version 31. The proxy setting inside Firefox network option is Auto-detect proxy settings for this network. Before upgrading to ...
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2answers
191 views

LAN adapter works every second time I turn my PC on

I have a really strange problem and I am desperate for help now, since I could not find any solution on the internet. Specifications first: I am using a desktop computer and a router. The router ...
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1answer
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how to setup routing on Win 7 to send all data going to 10.148.xxx over ethernet and all other ranges over wi-fi?

I want to setup my win 7 to route everything going to the 10.148.xxx.xxx over my Lan and everything going elsewhere over my wi-fi. Any help?