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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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
3k views

Where can I find my NIC’s GUID (for use with ForceBindIP)?

I’m trying to create a context-menu item to run ForceBindIP. I saw a similar question that discusses doing this, but I don’t know how to find the GUID for my network interface. Where can I find it?
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2answers
47 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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0answers
35 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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6k views

Realtek-NIC with VLAN under Windows always showing UNPLUGGED

I'm running a Win7-Machine and need to configure my NIC to understand untagged and VLAN-tagged packages. I'm using a Realtek PCIe GBE Family Controller and already installed a common tagged ...
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1answer
79 views

Prioritize network adapter initialization on startup

TL;DR: How to make the network adapter connect earlier/faster? When I start up the OS (Win 8.1) from either Hibernation or from a full restart my network adapter won't connect as fast as I'd like it ...
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1answer
9k views

Why won't WIndows XP recognize my network adapter?

I have used Everest to determine that my network adapter is a RealTek RTL8139/810x Fast Ethernet Adapter and installed the appropriate driver. But I can't see any Local Area Connection in my Network ...
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1answer
3k views

Driver for wireless card WNC-0301 (Level One) for XP 64 bit

I looking for drivers for network wireless PCI card WNC-0301 of Level One for Windows XP 64 bit. The one I found on company's site is zipped with password. In short, do somebody know where to find ...
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1answer
7k views

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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6answers
26k views

How do you check the current duplex value of a network card set to Auto negotiate in Windows?

I would like to know what duplex (half or full) my network card has negotiated with a switch when they are both set to auto configuration in Windows.
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2answers
3k views

How can I remove a network interface from being listed in Linux?

A software I use gets confused if there is irda0 (or some other uncommon device) in the ifconfig -a output. What is the easiest way of preventing that device from getting listed? I'm looking for an ...
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1answer
7 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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2answers
8k views

Can't get IP on Windows 7 after extensive troubleshooting

My Windows 7 system is not able to pull an IP from my router's DHCP. This just started a few days ago, and I've done quite a bit of troubleshooting. Here's what I've tried in roughly chronological ...
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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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1answer
6k views

My internet speed wont run at 1.0 Gbps on my Realtek PCIe Family Controller

I have an asus Gigabit Router and a gigabit NIC (Realtek PCIe GBE Family Controller) witch is running at 100Mbps rather than 1000Mbps (1.0 Gbps). When I use an old laptop on the same Ethernet ...
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1answer
4k views

How can I determine which Wireless LAN adapter model do I have on my Netbook?

I have an Acer ONE 533 Netbook which was working fine but recently something happened to the Wireless LAN adapter. After taking a look at the Device Manager, I realized that there are no drivers ...
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14 views

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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3answers
9k views

network adapter driver problem in Windows 7

I am facing problem with my Windows network adapter. It detects all the available networks but it shows "Limited Access" for the network I wish to connect. On diagnostics it gives "The wireless ...
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1answer
39 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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6answers
19k views

How to fix network connection dead on startup, but okay after disable/enable?

on Startup When my system starts up, the internet connection is dead. This causes various problems with startup items such as updates and auto-start programs failing. However, the connection is ...
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2answers
1k views

Windows 8.1 Update: Network Adapter Issues

I've recently updated my pc from Windows 8 to 8.1. However,I am now unable to connect to wireless networks. Instead, it says 'No Connections Available' in the networks charm. Under the wireless ...
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1answer
43 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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2answers
249 views

Is my Network Interface Card faulty?

I've got a Dell Optiplex GX240 running Windows XP, and am having network issues with it. I downloaded and installed updated drivers from DELL, but the issue is not resolved. Windows Device Manager ...
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1answer
149 views

How can I *quickly* cycle the a Wifi Network Adapter in Windows 8

Before you close this as a duplicate, please read carefully. In Windows XP, when there was a problem with Wifi, you could right-click on the icon, and the context menu allowed you to disable/enable ...
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1answer
93 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
156 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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12 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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2answers
263 views

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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1answer
30 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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57 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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11 views

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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75 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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31 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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1answer
60 views

Virtual Network Adapter

I am new in networking and virtualization. I really need assistance on this problem. I have a scenario: there are 4 virtual machines that created through VirtualBox on WIN7. 2 of them are centos, 1 ...
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32 views

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
125 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
65 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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1answer
56 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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2answers
7k views

Does 1 Gbit/s port in full-duplex mean 1 Gbit/s send and 1 Gbit/s receive?

I'm figuring out the best router for me based on their performance. When you have a 1 Gbit/s port in full-duplex, does that mean you can send 1 Gbit/s and receive 1 Gbit/s at the same ...
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3answers
2k views

Mac: number of bytes transmitted over interface

On linux, I'm used to typing ifconfig and looking for the line with "RX bytes" and "TX bytes" in it to find out how many bytes have been received and transmitted over a particular interface since ...
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2answers
23k views
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1answer
34 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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1answer
3k views

Updated Win XP to 7: network adapter driver issue

I updated Windows XP on my old laptop to Windows 7. After installing I tried to open internet connection but Win 7 says that it cannot find network adapter because of a missing driver. I tried to find ...
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0answers
30 views

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
95 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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5answers
10k views

How can I determine which network adapter my browser is using? How can I change it?

I have multiple network adapters on my Windows XP system. Is there a way I can establish which adapter Firefox and Internet Explorer are using? Can I force them to use a specific adapter?
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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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142 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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1answer
104 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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36 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 ...