For questions on connecting devices together so that they can communicate with each other, as well as on networking equipment such as routers and switches.

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26
votes
2answers
11k views

How do you get loopback addresses other than 127.0.0.1 to work on OS X

According to everything I read, the entire 127.x.x.x subnet should loopback. However, on my Mac, I can only ping 127.0.0.1 I know I've done this before (though possibly on another OS) and has come ...
26
votes
4answers
123k views

Permanently map a network drive on Mac OS X Leopard

I want to have a mapped drive in Mac OS X which points to my NAS - however I've found that I have to do it after every single reboot. I'm a Mac noob, so would like to just have the drive mapped at ...
26
votes
3answers
81k views

Is there a good DNS server I can install on Windows 7 for a LAN? [closed]

I have a few computers on my LAN, and now I'm getting tired of remembering the IP addresses all the time, so I would like to start using DNS names on my LAN. I have a heterogeneous network with ...
26
votes
2answers
47k views

Do different positions of the antenna on a wireless router make any difference?

Often, the antenna of a wireless router can be moved in many directions. Does it make a difference as to which way it points? Should it point toward the device(s) using it? Should multiple antennas ...
25
votes
4answers
4k views

Why does the “Internet of Things” enforce the need for IPv6 addresses?

If you have multiple devices in one network, the amount of IPv4 addresses will not increase linearly to accomodate the number of devices. There is just one IPv4 address per Network/Router that is ...
25
votes
5answers
2k views

What gets uploaded when I surf the web?

I am using a modem, and it shows a download speed of n kbps and an upload speed of m kbps. When I check its logs, it shows the amount of data downloaded and uploaded. I'm wondering why it shows that I'...
25
votes
7answers
60k views

Getting a VMnet0 error in VMWare workstation after updating host computer from Windows 8 to 8.1

Yesterday, I updated my computer from Windows 8 to 8.1. I have VMWare Workstation 10 running Windows XP on this computer and prior to the update I had no issues connecting to my network. However, ...
25
votes
14answers
18k views

IP Address vs MAC addresses

why do we need ip addresses if mac address is enough to identify the machine???
25
votes
9answers
181k views

How to find the MAC address of a remote computer?

I know the IP address of a host on my own LAN. Using that, how can I find its MAC address (without having to physically access it)?
25
votes
4answers
4k views

How does HTTP become stateless?

HTTP is said to be stateless. Meaning, it doesn’t need to store information for the transmission of data. But HTTP uses TCP, which is state oriented. If that's the case, how does HTTP becomes ...
25
votes
8answers
125k views

How can I monitor internet usage in my network?

I need to know which computer is consuming my bandwidth. Is there a tool to do this?
25
votes
4answers
5k views

Two Routers are fighting each other on LAN

My apartment is quite large and most rooms have several walls, meaning Wifi signals drop easily. To combat this I found a spare DSL Router I had previously and placed that in the Kitchen and ...
25
votes
2answers
187k views

Difference between Ethernet splitter and switch

I have one Ethernet port that is wired directly to the router on another level. However, I want to run a desktop and a server both off this one Ethernet port. Can anyone tell me the difference ...
25
votes
2answers
188k views

Is there a PC equivalent for the Android 'Wifi Analyzer' App? [closed]

I'm using the Wifi Analyzer app on my phone a lot at the moment as I need to set up and test some wireless networks. For people unfamiliar with the app, i've posted some screenshots of the app that I ...
25
votes
2answers
21k views

Looking for a fiber optic “switch” or “router” for home use

The gist of my question: What is a "fiber optic" switch called? I.E. a layer 2 ethernet switch that uses fiber TX and RX connections and sends layer 2 network traffic between the fiber strands ...
25
votes
5answers
95k views

Pinging a machine on my local network gets an 'unreachable' response from my own IP address?

Edit for future readers who get here from google: This question is now the top google result when searching for 'destination host unreachable from my own ip address'. If that's how you got here, then ...
24
votes
9answers
3k views

How to identify from a Windows computer the wireless device that is poisoning router?

I live in a house with various other people who all swear that there is nothing wrong with any of their devices. The problem being is that when wireless is enabled on the router, ping sky-rockets and ...
24
votes
5answers
42k views

How does Windows 7 decide which route to take if 2 connections to an internet source exist? (e.g. a Wireless and an Ethernet one to a router)

How does Windows 7 decide which route to take if 2 connections to the Internet exist? (e.g. wireless versus wired)
24
votes
8answers
201k views

How to bypass web URL filtering service to access blocked websites (proxy)

I'm using network, where services such as Gmail or any other e-mails, Google Drive, Dropbox, all social networks are blocked. Basically my goal is to access simply GMail, but I couldn't find any way ...
24
votes
2answers
26k views

How can I monitor network usage by process on Mac OS X? [duplicate]

Possible Duplicate: Application for monitoring all applications that are using the internet in Mac OS X Bandwidth monitor for Mac OS X? Is there any way to find out which process using how ...
23
votes
5answers
5k views

Can my landlord access my personal network because he controls the upstream connection?

Can my landlord access the things on my personal router's network because he controls the upstream connection? For example: the DLNA on my NAS, a public file share on my NAS, or the media server ...
23
votes
3answers
76k views

How to detect the speed (fast or gigabit ethernet) of a network connection over Windows command line

To troubleshoot a network problem I would like to inquire the real network "speed" for a given network adapter, which can be seen when opening the "status" of a network connection under Windows: ...
23
votes
13answers
21k views

Visual Network Topology Map?

If I have no idea of the current network setup, and I'm connected to the LAN - is there any GUI that could possibly identify nodes visually or give me any sort of insight? I'm looking for a more ...
23
votes
8answers
97k views

Find an unknown static IP + subnet mask of device?

I have a device set with a static IP and subnet mask. I do not know the IP or subnet mask. How can I find the devices IP and subnet mask? It is a piece of hardware, not a PC. It will not take an IP ...
23
votes
2answers
56k views

How to block all traffic but one IP in Windows Firewall?

I'm trying to use Windows 7 firewall to block all outgoing and incoming traffic, from all IP's and for all protocals, except for UDP to and from one particular IP address. The reason why is because ...
22
votes
8answers
4k views

What are the disadvantages (if any) of accessing the internet through two or more “chained” routers?

My Problem I just got internet setup in my dorm room at school through a third-party provider. The modem they gave me, however, also functions as a wireless router. I also have my own router with ...
22
votes
13answers
12k views

Running cat5 cable outdoors

I'm trying to extend my network to an unconnected garage that's about 20 yards away from my house. What's the best way to do this? Is there special outdoor-rated cat5e/cat6 I should use? If put it ...
22
votes
5answers
95k views

Microsoft Remote Desktop Bandwidth Usage

I am wondering how much bandwidth in terms of bytes sent/received is consumed by a typical remote desktop session. I need to know this because our ISP enforces a cap on monthly bandwidth usage (i.e. ...
22
votes
8answers
13k views

Disable WLan if Wired/Cable Network is available

The question says it all. All i want is that my W-Lan connection should be disabled whenever a wired connection is available. What would be the easiest way to do that in Ubuntu/Gnome? In all guides (...
22
votes
4answers
20k views

What is VPN actually used for?

I've never really understood why VPNs are used. I know it stands for Virtual Private Network, but in simple terms how does it work and what is it used for?
22
votes
4answers
19k views

What happens when two computers on the same network have the same MAC address?

I was reading an article on WEP cracking, which said that filtering MAC addresses was not enough, since there are tools to change what the computer reports as its MAC address. This made me wonder ...
22
votes
2answers
10k views

How do I check the internet usage of a particular device in my room?

I am living with 5 other people and most of our network is consumed in 20 days so we have to spend almost 10-11 days without Internet. I just wish to know what are the ways to monitor the internet ...
22
votes
8answers
18k views

How can I join two simple home networks together using an ethernet cable?

I want to join two different home networks together like so: PC A1 PC A2 PC B1 PC B2 \ / \ / Gateway A ...
22
votes
4answers
40k views

Is it possible to boot from an ISO over the network, and how?

I have a machine with a bootable ISO stored on it, and I have another blank machine, which I want to install the ISO on. They're both on the same LAN (attached to the same switch). How would I go ...
21
votes
9answers
4k views

Will an Ethernet splitter work?

I have a room with only one Ethernet cable going there, but I would like to connect two devices on it. Is an Ethernet splitter suitable for that? I am talking about something like this: In theory ...
21
votes
11answers
114k views

Are routers limited to number of devices?

I'm going to buy a new router, but, I've just realised that for nearly all routers I've looked at (Belkin, Netgear, D-Link) don't state the maximum number of devices which can connect concurrently. ...
21
votes
4answers
16k views

sshfs mount without compression or encryption

I am a very frequent user of sshfs for mounting various disks over the network. I do however have a very small machine (with an atom processor) from which I need to mount a directory using sshfs. Is ...
20
votes
5answers
14k views

Ethernet vs TCP vs IP?

What is the difference between Ethernet, TCP, and IP in simple (simple abstract) terms? Please do not copy from Wikipedia...
20
votes
3answers
3k views

How does port-forwarding help in torrents?

I use Transmission to download files but it says that a certain port is required to be opened. However, while this port is closed I noticed that I can still download files with no problem. But when I ...
20
votes
7answers
27k views

Why is it bad to have open ports?

Here's something that has always baffled me. Why is it bad to have open ports on your computer? Assuming you don't have a virus on your computer or some other program listening to a port that may ...
20
votes
6answers
39k views

Merging two incoming broadband lines for faster internet

We have a broadband line coming into our building which delivers around 8-10mbps, which is ok but not great, although fibre is available in our area (30-100mbps) its not available where we are just ...
20
votes
2answers
74k views

Tunnel adapters on ipconfig?

Hello I recently noticed unusual information in my IPCONFIG. Usually I only see Ethernet adapter Local Area Connection, but now I see Tunnel adapter isatap... and Tunnel adapter Teredo... I was ...
20
votes
3answers
130k views

How to monitor bandwidth use of each device on wifi network

I have in my home a standard Comcast cable internet connection. I have it going from the wall to a cable modem, and from the modem to a late-series Linksys router, which provides wired and wireless ...
20
votes
5answers
46k views

Force programs that do not specify proxy settings to use a proxy (ie: Steam)

My school requires a proxy for all internet access. If you want to use the internet, it is impossible to not use a proxy. This makes it a problem for many programs that don't seem to let you enter ...
20
votes
5answers
26k views

How to set the Windows network timeout for physically disconnected mapped drive?

When a network drive (net use) is physically disconnected, Windows Explorer (and other programs) keep trying to enumerate and/or use it for maybe 60 seconds. Is there some way to reduce this timeout ...
19
votes
9answers
67k views

Finding other computers on network over command line

I've got a handful of Macs on my home network, and shell access to only one of them from the outside. How can I figure out what IP address of the other machines are?
19
votes
7answers
10k views

Can a huge coiled LAN cable have some trouble for transmitting a signal?

Let's say I have a long (> 30m) LAN cable, that connect two (very close) devices. Could some of the unused wire, disposed as a huge coil, cause any issue ? I'm thinking about the special wire layout ...
19
votes
4answers
2k views

Are subnets always contiguous 1s? [duplicate]

I understand the basic premise behind subnet masks, such as 255.255.255.0. But all the subnet examples I’ve seen have been (from left-to-right) contiguous 1s (HI bits). For instance, 255.255.0.0 (/16) ...
19
votes
1answer
103k views

Unable to access most internet sites error DNS_PROBE_FINISHED_NXDOMAIN

I have problems accessing most websites, only a couple work (grooveshark, google, facebook). On almost all others I get errors. Here is what I got using different browsers: Opera: This website is not ...
19
votes
4answers
56k views

How do I tell Windows 7 to trust a particular network location?

How do I tell Windows 7 to trust a particular network location? I'm not sure how to elaborate from the title of the question! I keep getting popups aka "this location is not trusted". I've mapped a ...