Questions tagged [ethernet]

A family of networking technologies for LANs. Ethernet encompasses bother the physical connection between devices and part of the protocols which define how the connected devices can communicate.

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115
votes
19answers
48k views

How do I physically prevent people from unplugging an Ethernet cable?

We have a crowded computer laboratory. We render free Ethernet ports for laptop users. But they don't carry their Ethernet cables with them, they unplug cable of a fixed desktop PC and plug it to ...
69
votes
7answers
92k views

The locking clip/tab on my Ethernet cable's plug is broken. How can I fix it?

I have a 10 meter long Ethernet cable. One plug has the little locking clip missing, just like missing the part in red ellipse in the following picture. How can I fix it? Is this something I should ...
60
votes
12answers
10k views

How do I Connect a 30yr-old Tandy 1400LT laptop to the internet?

Just for the fun of it, I want to get an old Tandy 1400LT laptop: NEC V20 (Intel 8088 equivalent) 640 KB RAM 9'' CGA backlit monochrome display two 3,5'' 720KB DD floppy drives RS-232C serial port (...
47
votes
9answers
12k views

Why am I getting 950 Mbps up but only 360 Mbps down on Gigabit Ethernet?

I got two desktop computers talking to each other directly. They both have Gigabit Ethernet capable network adapters. That's 1 Gbps or 1000 Mbps. I have them connected with a brand new 10 meter long ...
41
votes
4answers
19k views

Is there any harm of leaving Ethernet outlet unplugged?

I was wondering if leaving an active Ethernet port with no plug in it was safe . We have one in our kitchen right next to our face level and I was wondering if leaving it unplugged in the open was ...
40
votes
9answers
135k 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 it ...
39
votes
4answers
8k views

How should I connect 7 devices to a switch module with four ethernet interfaces? Is there a preferred topology?

I have a router/switch with four switch ports on the back, to which I need to connect seven devices. Is there a reason to prefer one or other of the below topologies, or would a completely different ...
37
votes
6answers
31k views

Can you plug the computer directly into the wall to access the Internet? [closed]

My system is essentially: Wall -> Ethernet -> router -> Wi-Fi -> computer But I'd like to simplify it for this purpose and just do: Wall -> Ethernet -> router -> Ethernet -> ...
37
votes
7answers
190k views

Why does just splitting an Ethernet cable not work?

I thought the Ethernet is logically a one-line communication bus (for argument's sake, I am excluding hubs). All machines attached on the bus hears the same signals and the machines themselves try to ...
35
votes
4answers
130k views

Is there an Apple USB Ethernet driver for Windows?

I recently needed an Ethernet adapter for my laptop, which has USB and WiFi (of course) but no Ethernet. Somebody offered me an Apple USB-to-Ethernet adapter. I figured Windows would offer the driver ...
31
votes
6answers
156k views

How to unplug a network cable that's stuck?

I have plugged a network cable into my PC to temporarily adjust some settings on my router. Now I can't unplug it. The cable is physically stuck in the RJ45 port. I've tried squeezing every part of it ...
31
votes
7answers
41k views

Ethernet cable too long?

I have an Ethernet cable running from a Huawei ADSL router to a computer> The total length is 61 meters (200 ft). When connected to the computer, a cycle of identifying, disconnected, identifying, ...
31
votes
2answers
291k 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 ...
30
votes
5answers
12k views

Why do similar devices use a cross-over cable instead of a straight-through cable?

Why do similar devices use a cross-over cable instead of a straight-through cable?
30
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3answers
5k views

How is uniqueness of MAC addresses enforced?

Again and again I read that devices are uniquely identified by their MAC addresses. But how are MAC addresses determined? (And do they tell us anything about the device which they represent?)
29
votes
3answers
118k views

Maximum length of Ethernet over CAT5

As part of my course I’ve been reading the paper Ethernet: Distributed Packet Switching for Local Computer Networks. I understand that “classic” Ethernet (over coaxial cable) has a maximum length of ...
29
votes
2answers
37k 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 that ...
28
votes
9answers
89k views

How to remove all the vEthernet (Default Switch) once and for all?

As in the screenshot above, I don't know why the vEthernet (Default Switch) on my Windows 10 laptop keeps reproducing itself and auto connecting to it everytime I shut down and switch on the laptop. ...
28
votes
5answers
69k views

How to take advantage of two Internet connections (WiFi / Wired)?

I have two separate internet connections, one through WiFi and other Wired. However, generally I have observed that Windows try to use only one ( mostly faster one/ Or Wired by preference - I am not ...
27
votes
7answers
86k views

Do cabled connections and Wi-Fi “use” the same bandwidth?

My brother likes to play games online on his Xbox. However, because he is far away from the router, he uses our Wi-Fi instead of an Ethernet cable. I, being closer to the router, use an Ethernet cable ...
27
votes
5answers
56k views

Bridging Wifi to Ethernet on Ubuntu not working

When running Windows I was able to bridge my wifi connect through my laptops Ethernet connection so a range of ethernet only devices could piggy back off my wifi (Raspberry Pi, Xbox etc etc). I am ...
26
votes
11answers
22k views

Is it possible to connect an external GPU via Ethernet?

I have laptop which has working Ethernet port but I always use WiFi . I am wondering if it is possible to run and use a graphics card (with external power supply) connected to the Ethernet port (with ...
26
votes
6answers
255k views

Connect to internet with wifi, while wired to a different LAN through ethernet

So I have a small router I'm connected to through an ethernet cable, and I'm having multiple devices connecting to that router through wifi, so they can view my computer screen. Screen sharing on ...
26
votes
2answers
68k views

How to Bridge Two Ethernet Ports on Mac OS X

How can I bridge two wired ethernet interfaces on Mac OS X (e.g. the current MacPro comes with two ethernet ports)? Googling turned up (e.g. this Apple forum post and this openvpn post) that this is ...
25
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5answers
25k 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...
25
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11answers
18k views

Home Networking: How can I have ethernet in another part of the house?

I would like some help with home networking. I have a place with two rooms. In one of the rooms there is a router with wireless capabilities. I can connect a computer to it with ethernet cables or ...
25
votes
5answers
14k views

Home ethernet - daisy chained

I recently bought a house with RJ-45 and RJ-11 on one wall plate, and coax for TV on the other plate in a single box in each bedroom. I opened one up, and it looks like they did not run individual Cat ...
25
votes
5answers
49k views

How can I tell which network interface my computer is using?

On a MBP (OS X 10.6.2) I've got the wired ethernet and wireless airport configurations set up to use the same static IP to my router (e.g. as described at http://forums.macrumors.com/archive/index.php/...
23
votes
5answers
11k views

My ISP doesn't use a modem. How does this work?

I have only an Ethernet cable straight to my apartment. The Internet works when I just plug in this cable into the computer. They say that there is a switch somewhere in the apartment building. Where ...
23
votes
8answers
50k views

Getting IP address of a direct-connected computer

I’ve connected my working computer with another one using a direct Ethernet cable. The other machine is a desktop computer that has no peripherals (including keyboard, mouse, and monitor) attached and ...
23
votes
7answers
100k views

Why is my laptop favoring the wireless connection over my LAN connection?

When my laptop comes out of sleep, I have to typically wait about 90-120 seconds before my network (wireless or NIC card) 'wakes up'. During that time, I see my wireless connection with 'limited ...
22
votes
8answers
16k views

cat6 cable only getting 100mbps over larger distance

I know this question has already been asked a few times but I feel that my case is a little different since I've tried all the solutions provided in the other threads. I created a small diagram to ...
22
votes
7answers
12k views

Does Ethernet over Power Lines work well for home networking?

I am considering putting a computer in my garage (geek alert) and my wireless signal is simply to weak to get through all of the concrete, steel, etc. I've seen products at Fry's for Ethernet over ...
18
votes
4answers
46k views

How can I use coaxial cable for ethernet

My office is a converted garage about 30 feet from my house. I have a coaxial cable already running from my house to the office. I want to attach a Ethernet cable from my DSL modem, in my office, ...
18
votes
6answers
5k views

Will the ethernet pull bandwidth if unplugged?

I'm fairly certain that this isn't a problem, but like a phone charger it will still pull electricity even though you aren't charging anything if you leave it plugged into the wall. Though minimal it ...
18
votes
5answers
28k views

What would be the disadvantages of using a 4 stranded ethernet cable?

I got this cable with a homeplug AV 200 device - its labelled cat 5e But looking at the plug end has me rather dubious about it. (There's only 4 strands there, not the standard 8 - and missing pins, ...
18
votes
3answers
63k views

Does it matter what UDP port a WOL signal is sent to?

i have seen many WOL instances use port 7 and many use port 9, does it matter? Isn't it just looking for a WOL packet at layer 2 or ethernet?
18
votes
1answer
39k views

What happens if an unmanaged ethernet switch is looped (connected to itself)?

I don't know much at all about networking, and I when I tried to find an answer to this online I found someone who posted a one sentence answer saying "It would cause lots of broadcasts and collisions....
17
votes
2answers
7k views

Crossover cable or straight through between multiple hubs/switches

I'm networking a bunch of Raspberry Pis together on a subnet as shown in my highly technical diagram below: I'm wondering if the red cables are supposed to be crossover cables or straight through? ...
17
votes
4answers
33k views

When concurrently connected to wired and wireless ensure Windows 7 uses wired connection

When I am at my desk and my laptop is in its docking station I want to ensure that it uses its wired connection and not my wireless network. I am hoping/guessing that the preference in connection is ...
17
votes
4answers
11k views

Why does no small Rj45 port exist? [closed]

While I bought my last Tablet I noticed that no Tablet (and most smaller notebooks /convertibles) has a Rj45 port. Which I finde quite dissatisfying since I like to use RJ45 in numerous places. I ...
17
votes
9answers
101k views

Why do I only get 300-400 Mbit/s on my 1000 Mbit/s network?

My setup is like this: Laptop <--> Router <--> Desktop They all support gigabit Ethernet. I'm using the 'iperf' TCP/IP benchmark on the laptop and desktop, and I've never gotten more than 400 ...
17
votes
3answers
44k views

what is the difference between eth1 and eno1?

What is the difference between the network interface name ethX (e.g. eth1) and enoX (e.g. eno1), given by ifconfig or lshw ?
16
votes
5answers
74k views

Wireless vs. Wired: which is faster?

I have the option of hooking up my machines to the internet either wirelessly or via ethernet cable (wired). I'm curious as to which is faster; the approximate wireless signal strength (average) is ...
16
votes
11answers
6k views

Why are Ethernet/MAC addresses needed?

I don't understand why Ethernet MAC addresses are needed. Can't all computers just be connected to the unified network and use IP addresses to communicate? For example, there is a following mechanism ...
16
votes
4answers
17k views

Where can I find an unswitched ethernet hub? [closed]

Back when I was just getting into networking, ethernet hubs were common, and switches were a fancy, expensive alternative. Then the price of switches came down so much that hubs became pretty much ...
16
votes
6answers
71k views

Wrong order in CAT5 cabling — does it matter?

I've got in-wall CAT5 wiring in my house. The wall sockets were done by an electrician and the requirement was straight-through T-568B, but I think he got it wrong. When I use a cheap cable tester, I ...
15
votes
6answers
19k views

Set Ethernet Network as Metered Connection in Windows 8

Windows 8 introduced a new feature which allows users to set any Wi-Fi network as metered so that they can check their bandwidth usage: [img credit] But, it doesn't allow users to set any Ethernet ...
14
votes
6answers
17k views

Can I create an Ethernet network without using IP

As I understand from the ISO-OSI model, MAC addresses operate on a different layer than IP addresses. This is clear to me. I can accept that Ethernet (LAN) just does not make use of IP addresses to ...
14
votes
1answer
89k views

How can I share a laptop's Wi-Fi connection through its Ethernet port?

I have two laptops, one with a working Wi-Fi connection (Laptop 1) and one without (Laptop 2). As I have no Ethernet plugs nearby I want to connect Laptop 2 to Laptop 1 via an Ethernet cable so that ...

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