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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(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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222 views

How can I tell if my wired ethernet connection is using 802.1X authentication on Windows 7?

From a command prompt (or a script) I'd like to be able to query the wired interface to determine if it has succesfully established an 802.1X connection, or if it has fallen back to unauthenticated ...
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669 views

Trouble setting up more than 4 network adapters in VirtualBox (XP Guest)

I've been trying to setup the 8 network adapters that VirtualBox is supposed to support, through the command line. I need them as bridged networks (because I use them to forward ports from a server ...
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759 views

Connecting to Bluetooth Personal Area Network Fails

I'm trying to connect to my phone's Bluetooth PAN but nothing happens when I do. I click the button that says "Connect Using" which gives me two options: [Option 1] "Direct Connection" ...
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97 views

What could be causing two different laptops both with Wireless-N adapters to have very different speeds?

My dad recently bought a Dell XPS 14 laptop that had an integrated Intel(R) Centrino(R) Advanced-N 6235 wireless adapter, but it appears to be known to drop connections a lot. He'll suddenly get ...
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729 views

Prefer WiFi over Ethernet

I want to use my Ethernet power line adapter in order to use Wake on Lan for my desktop PC. However, once it has booted into Windows, I want it to use my WiFi by default, as the powerline adapters ...
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3k views

How to upgrade Intel(R) 82567V-2 Gigabit Network Connection Drivers for Windows 7 64?

Problem When I go to Device Manager, under Network adapters I have an Intel(R) 82567V-2 Gigabit Network Connection adapter that has a yellow exclamation point. I am trying to upgrade its drivers but ...
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36 views

Where are PC's NIC settings saved (i.e. custom MAC or power management options)?

Recently i learned how to enable and use WoL, but some details about it's underlying mechanisms are still mystery for me. In this answer on serverfault was said, that WoL is OS independent ...
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709 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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107 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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24 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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109 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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101 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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60 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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139 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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900 views

Slow/restricted internet speed on Ubuntu 14 (driver/hardare issue?)?

I recently built my own desktop and I have noticed that it consistently gets ~ .8 mbps download speed when on the ethernet and slightly better when using wifi. I have run several tests that can ...
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144 views

Windows 8 creating 'ghosts' VPN connections

I have a paid VPN service (StrongVPN), and as I live in university halls I have to connect to the internet through the university's VPN and then connect to StrongVPN. This usually works fine, but ...
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81 views

Can't disinstall Intel(®) Centrino(®) Wireless-N 100

I need to disinstall Intel(®) Centrino(®) Wireless-N 130, but when I try to disinstall it, nothing appens: ComputerManagement -> Device Manager -> Network Adapters -> Right-Click on Centrino -> ...
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111 views

Does a VirtualBox/CentOs need two adapters to work properly ?

I have a Windows 7, 32bit, HP Laptop. I have CentOs 6.5 running on VirtualBox 4.3.10. Here is my eth0 config. Code: #vi /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 ...
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847 views

ethernet interfaces are sometimes renamed to 'renameX' on startup

I've installed a recent daily build of Ubuntu Trusty on several HP dl380e 2U servers. These servers have 4 x 1Gb onboard NICs. In addition, I've installed a PCIe 2 port 10Gb NIC in each server. The ...
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407 views

Using DHCP to get multiple IP addresses on single NIC on RedHat

I am trying to obtain multiple IP addresses using the ISC dhclient supplied with Red Hat Enterprise Linux 5 in order to provide the IPs to multiple applications, which will run on separate virtual ...
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41 views

How does synchronization between two independent computer's NIC work (e.g. on Ethernet)?

I'm currently studying computer networks and the question came to my mind, how it is physically possible for the NICs of two networking computers to determine the clock rate of incoming datastreams. ...
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HP J8156A Vernier network adapter

I've got a network card, that may or may not be working that I am trying to use in my home server. Got it from ebay as "used".The card does not let the computer boot, the computer turns on, but ...
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66 views

IPConfig lists very strange tunnel adapter

I was trying to troubleshoot a different computer on my network, and ran ipconfig on MY computer for reference. One of the adapters listed is - Tunnel adapter satapi.GHGKZ.com: Google has ...
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81 views

Wireless connection behaves strangely after windows 7 fresh installation

Since I installed a fresh installation of Windows 7 Home Premium, my Internet connection behaves very strange when on wireless. It disconnects and reconnect by it self without any notice. It slows ...
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372 views

PC flooding & crashing network switch only after it's shutdown

I discovered this problem because EVERY SINGLE TIME I left the house my Internet connection would go down and I would not be able to remotely access my netowrk. I installed Windows 8.1 RTM on my ...
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754 views

How to Create WiFi Hotspot with Single Adapter in Windows 7

I know how to create a hotspot when connected to a wired network, but when I am using internet from a WiFi connection, this disconnects the wireless connection the moment I activate the hotspot. In ...
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346 views

Why does Ubuntu 12.04 detect only one USB Ethernet adapter?

The problem is that I am connecting three client computers to another central computer through: the one normal Ethernet port connected to one client computer (eth0) two USB to Ethernet adapters ...
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136 views

Limited connection whenever I connect to a Wi-Fi network outside the company

Whenever I connect my work laptop to a wireless network outside of my company, the connection shows as Limited, and there is no internet access. I have tried several times by disabling/enabling the ...
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171 views

HP DL380 using HP NC522SFP NIC shows supported link modes: not reported

When using ethtool on this NIC, the supported link modes show "not reported". Any idea why this is the case? Settings for eth0: Supported ports: [ FIBRE ] Supported link modes: Not reported ...
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226 views

Cable unplugged after NeoRouter connection disabled once

Network adapters can be disabled and then enabled again in Windows. This doesn't work for the NeoRouter network adapter, which is a VPN shell. What happens is that once disabled, this adapter can't ...
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845 views

Speed/Duplex auto-negotiation suddenly stopped working

Today my internet suddenly stopped working and the network adapter started cycling between "Network cable unplugged" and "enabled". I googled the issued and some people suggested to modify the Speed ...
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745 views

Windows Network Bridge Connections Greyed Out

I can bridge the connection under administrator account. I have disabled the prohibit installation and configuration of Network Bridge on your DNS domain network Group Policy setting. The option to ...
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119 views

Windows 8 - LAN connection doesn't startup on reboot

I don't know what's gone wrong, but of late whenever I reboot my Win 8 Pro x64 box, the ethernet connection doesn't turn on by itself. I have to go into network settings and manually disable/re-enable ...
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231 views

Network disabled in Windows 8 PC on startup

Windows 8 64-Bit pc will not detect network on startup. Every time we have to do a "scan for hardware changes" in device manager. Otherwise it will not connect to network automatically. We did ...
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342 views

Getting Fiddler to work in a VM guest behind a proxy

I have a Mac OSX host and I'm running Parallels (but the same problem exists in VirtualBox). The scenario is that the Mac is wired into a corporate network with an explicit proxy set. The VM running ...
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686 views

Windows 8 slow network wakeup from sleep

The problem is that Windows 8 is far more slower than Windows 7 waking up from sleep if you consider network adapter. With following settings: Going to sleep and back looks like this: And ...
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334 views

Windows 8 Pro with hyper-v no network connectivity after reboot

I have Windows 8 Pro workstation with Hyper-V installed and configured one virtual switch as "External", as on attached screenshot. My problem is, every time computer reboots, network does not ...
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2k views

Hyper-V VM Static IP - 2 IP Addresses

I'm trying to configure a server with virtual machines on Windows Server 2012, after finishing the installation of windows in the VM, I try to configure the IP as static, but a second address is ...
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147 views

Ubuntu 8.04 NIC change

I had a small box running ubntu 8.04 on it and it broke down. I moved the hard drive from it to a new box running different hardware just to see if i might be lucky and get a quick fix with no need to ...
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1k views

After disconnecting my vpn, why do I have to reset my network adapter to revisit certain sites?

If I create an encrypted connection to my VPN host (via openVPN) and tunnel all internet traffic through it everything seems to work fine (i.e. Websites think my ip is that of the remote server). ...
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56 views

Port 80 Drops ~50% of HTTP Requests, But Other Ports Work Fine.

I'm in a new work environment and I've encountered the most aggravating issue in my existence. Just about every other page doesn't actually load. It's driving me crazy! Everyone in a while, it ...
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278 views

Win7 Pro x64 task manager hangs when restarting explorer.exe after waking from sleep

I have a desktop running Windows 7 x64 Pro, set for Hybrid Sleep on a wired network. Wakeup is only enabled from the keyboard (wake on mouse and Wake-On-LAN are both disabled). Sometimes when it ...
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123 views

AM2NF6G-VSTA Motherboard NIC connection

I own a ASROCK AM2NF6G-VSTA motherboard. My integrated network card gives me the error 651 whenever I try to connect using a PPPoE connection. It always stays at 0 for received bytes but the sent ...
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175 views

Linux Mint gets stuck when using wireless card “rt73usb”

I'm changing Linux distributions a lot, wishing to resolve my problems with the wireless card identified as rt73usb, like explained in this question of mine. Now I'm using Linux Mint 12. I noticed ...
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3k views

Realtek PCIe FE Losing Connectivity in Win 7 Home 64-bit

I am having an intermittent problem with my network connection dropping out for no apparent reason. When it drops, I still see the lights blinking on the NIC card, but cannot pass packets even to the ...
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758 views

Wired network adapter doesn't function properly when starting Windows

Every time I start my computer, my wired network adapter stops working - this includes a cold start and resuming from sleep. If I head over to Network and Sharing Center and click Troubleshoot ...
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167 views

Troubleshooting Desktop That Can't Connect to Internet through Any Adapater, Even on Different OSes

I have a Windows 7 machine that also has Ubuntu on it. Yesterday the NIC spontaneously crapped out. I went and got a Dynex PCI NIC and set it up, my computer now finds networks but lists them as ...
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207 views

LAN card not working sometimes with windows

I have the following scenario MODEM + (FE)(Cable A) --> (WAN) ROUTER (LAN)-----(FE)Cable B----COMPUTER Now i have two LAN cards on computer 1)CARD A is build in Motherbord 2)CARD B is NIC ...
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305 views

Alias network adapter in Windows XP

I use a VPN channel for an online banking client. This channel is implemented as an NDIS filter installed on the outbound network interface which gets activated when you insert the smart card. When ...