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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20 views

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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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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38 views

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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18 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
31 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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77 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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60 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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31 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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33 views

Service Network Restart

Is the service network restart command and machine power cycle meant to same for NIC card or it is different? Because I feel that if we restart a service then it first shutdown the goes up. So ...
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19 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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1answer
24 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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31 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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1answer
26 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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15 views

Network cycles to public/unidentified on Windows 7

I set my network to public and it worked fine for about 6 months, but now every few minutes my computer decides to change the network location to an unidentified public network (and loses internet) ...
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111 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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70 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
42 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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19 views

Unable to connect the Ubuntu EC2 instance to VPC LAN on AWS using secondary NIC adapter?

Infrastructure setup: VPC is created with 192.168.254.0/24 netwok Private subnet within VPC (Virtual Private Cloud) is created with 192.168.254.0/25 network Public subnet within the VPC is created ...
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1answer
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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 ...
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69 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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2answers
83 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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1answer
723 views

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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12 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 ...
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11 views

How to discover current modulation used by my wi-fi adapter on Windows

I would like to know which modulation of signal (16QAM, QPSK, etc..) is my wi-fi network adapter current using in Windows Is there a way to discovery it in Windows natively, or should I use a ...
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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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46 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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1answer
46 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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403 views

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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14 views

Wi-Fi doesn't look up for networks automatically - W7

I think it may be a registry problem, ever since I uninstalled tunngle and a microsoft wifi miniport adapter, my TP Link usb adapter would not connect at startup unless I clicked the wifi icon at ...
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154 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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37 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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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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vSphere Directpath NIC isolation

I am building an home server, and I am planning to use VMWare vSphere to create multiple OS that will have precise tasks on the server. On the server, I'd like to have a firewall-antivirus using ...
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(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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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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1answer
194 views

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
78 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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73 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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1answer
45 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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Filter for Wireshark to show amount of downloaded data from a specific host

Need to check amount of downloaded data from some address when there are connection issues. Such issues are emulated with clumsy (http://jagt.github.io/clumsy/index.html). All packets that are ...
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2answers
113 views

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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19 views

Can one program use one NIC and another another NIC? [duplicate]

My laptop (Win7) have two NIC (one wifi integrated and one wifi dongle). It is connected to two different networks. Can I set for example uTorrent to download/upload over one NIC, and all others ...
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164 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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44 views

OpenVPN TAP binding order issue

I am running a 64bit Windows 7/8 AD environment using OpenVPN on remote computers to access our network/servers in our main office. Typically, once we install OpenVPN on a new machine and configure ...
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145 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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windows hosted networok on windows 8

my sister is using Acer laptop, that has an intel WLAN card and supports windows hosted network(checked in command prompt).Am using the basic way using netsh wlan command also, then am using netsh ...
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1answer
44 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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73 views

Juniper Network Connect couldn't connect to server

I've been using Juniper Network connect 6.3 to connect to our server from my windows 7 system. Recently, I'm unable to connect to the server as the Network Connect software in my system is not working ...