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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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 ...
37
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7answers
191k 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 ...
18
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5answers
29k 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, ...
12
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5answers
240k views

Can I use CAT5e jacks with CAT6 cable?

I was wondering if I can use a CAT5e keystone jack with CAT6 cable. I am refering to the parts that terminate a cable where it comes out of the wall. I want to run a 30 ft length of CAT6 but all I ...
13
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5answers
9k views

Automatically prefer Ethernet over WLAN

Is is possible to force IP connections over the wired ethernet if it is connected and over wireless LAN if the wired ethernet is unavailabe (e.g. cable disconnected). Both network connections would be ...
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 ...
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 ...
8
votes
5answers
3k views

CPU usage shoots to ~50% and stays there until suspended

This is the Windows Vista problem, seen, I think, mostly on dual processor laptops, where % CPU suddenly shoots to about 45% and stays there. Once this has happened, % CPU will never return to normal ...
11
votes
7answers
28k views

Combining two ethernet ports

My computer has two gigabit ethernet ports on the motherboard. Is it possible to have the OS (Win XP) combine them and treat as a single 2-gigabit connection? Failing that, is there any general ...
0
votes
3answers
42k views

Can I use a ethernet splitter to connect a router to two devices? [duplicate]

I have a portable mini wireless router with different functions (AP/Client/Router). Can I use a ethernet splitter to give internet access to two devices? The router only has a ethernet port and ...
10
votes
4answers
8k views

If a computer is connected to internet via wireless and lan both, which way Internet traffic would flow?

How does this actually work? How different ip addresses on ethernet adapter and wireless adapter are handled for internet data? I know these ip are translated in NAT table but the whole process ...
0
votes
2answers
2k views

Splitting ethernet cable

I have one ethernet cable that runs into my TV cabinet. It comes from a router in my closet. The router splits the main feed into the home into six runs that run through out the house. I now have ...
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 ...
13
votes
3answers
28k views

Will multiple switches slow transfer speed

I want to create link between a data server (It's more like NAS) and around 300 computers. Data transferred per day is around 2GB/computer and speed really matters. If I use a single switch it would ...
40
votes
9answers
139k 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 ...
30
votes
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?)
16
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6answers
72k 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 ...
11
votes
3answers
9k views

What is the logic behind the pin diagram of Ethernet cables?

Is there a reason why the pin diagram of an RJ-45 looks like this? I understand that the orange pair is used for Tx and the green pair for Rx. Why is it that the orange pair are kept together while ...
9
votes
2answers
180k views

What is the difference between Cat 6 and Cat 6e Ethernet cabling?

What is the difference between Cat 6 and Cat 6e Ethernet cabling? The length is not an issue for me, since I will be using the cables for intra-rack connections.
10
votes
6answers
80k views

Maximum/ ideal length of ethernet cable?

What is the maximum and/or ideal length of an ethernet cable? Is there a distance that data cannot be transferred over an ethernet cable, say over X number of feet?
5
votes
3answers
2k views

Buying another router and use as a “signal repeater” in bridge mode?

I asked about using a pc almost as a "router" and although it's a solution, I tought about just buying a second router to act as a "bridge" between my connection. (Reason: I don't want to have to keep ...
4
votes
3answers
10k views

How can I secure an Ethernet-over-power network?

I just bought myself an Ethernet-over-power adapter, and plugged it in. It seems to be working great, but now I'm concerned that my neighbours may be able to access my network. I live in a rowhome ...
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 ...
29
votes
9answers
92k 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. ...
26
votes
6answers
259k 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 ...
13
votes
10answers
7k views

“Modern” Ethernet over coax

So, I've just bought a house. It's reasonably new - built in the early '00s. One of the features that got built in was a cable TV drop in every room. The cabling is gorgeous - there's even a wiring ...
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 ...
19
votes
4answers
48k 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, ...
29
votes
3answers
119k 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 ...
11
votes
4answers
209k views

Can I split one Ethernet line coming out of my wall into multiple separate lines?

I live in an apartment which provides Internet service included in the rent. They use a company called Pavlov for the Internet http://pavlovmedia.net/ wireless seems to be working fine but wired ...
5
votes
8answers
16k views

Running Ethernet over two phone lines

I am trying to run Ethernet through my house along existing phone wires. I had originally planned to use the phone wires to pull the cat5e cable, but it appears the phone lines are stapled to studs ...
31
votes
6answers
160k 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 ...
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 ...
5
votes
1answer
3k views

Home networking: Do I need a patch panel, or just connectors?

Context: My current network layout is as follows: cat cables coming from the walls into a patch panel, from which Ethernet cables are going into a switch, which is connected to a router: An ...
2
votes
2answers
8k views

resolv.conf not working properly with Ethernet in Ubuntu

I have a Lenovo X200 laptop on which I am running Ubuntu 9.10. Recently, (I assume after some updating, but I really don't know) my ethernet port stopped working under Linux. A more tech/linux-savvy ...
1
vote
1answer
1k views

how do I set up a wired 1 to 1 network connection between two computers?

I have two computers connected by an Ethernet cable. One is a Windows 8.1 devbox, and the other is a CentOS 7 development server with only a terminal interface (No GUI). The development server will at ...
10
votes
6answers
10k views

Should I use a network hub or network switch?

I want to put a networking device on an Ethernet connection between 2 digital devices. The communication will be 1-to-1; there will only be 2 devices connected through the networking device. And I ...
9
votes
3answers
53k views

How to tell a Ethernet cable is conventional or crossover

I want to use a crossover Ethernet cable to connect two computers directly for file transfer between the two. I have several Ethernet cables, but not sure if they are crossover? How to tell a Ethernet ...
7
votes
2answers
20k views

What can cause auto-negotiation to fail on network?

Imagine you have both computer with a NIC that do gigabit with a router that do gigabit. What can cause auto-negotiation to fail on network ? (with proof if possible)
6
votes
3answers
16k views

What's the simplest (free) way to share a serial port over an ethernet link? [closed]

I have two computers and I'd like to access the serial port on one machine from the other. Is it possible to do this with free software and if so, what options do I have? The sharing machine is ...
6
votes
1answer
32k views

Can you mix gigabit and 10/100 ethernet on the same network?

I have an Apple Airport Extreme Gigabit router and some new machines I need to put on my network (PS3, Mrs' laptop etc.) but the router has only got four ports so I was thinking of getting a simple, ...
6
votes
1answer
14k views

NetworkManager timeout and “ip-config-unavailable” on Ethernet

I cannot get this laptop, Craptop, to connect to the Internet using the eth0 interface, but it can connect using the wlan0 interface. NetworkManager, managing eth0, times out when trying to find a ...
4
votes
3answers
541 views

Is there a way to stop my Windows 7 laptop from connecting to the Wi-Fi if the ethernet cord is plugged in?

Essentially I want to have my wireless automatically connect to the router, but only if the ethernet cord is disconnected. If the ethernet cord is connected, I don't want it to automatically connect ...
3
votes
5answers
10k views

What's the most cost effective (reliable) way to establish a 200m ethernet link?

As the title suggests, I have some kit which is 200m from our current infrastructure (outdoors). What is the cheapest way to establish a reliable connection across a 200m stretch (Cat 5e ethernet ...
3
votes
3answers
6k views

Wired and wireless connections: make Windows prefer Ethernet when connecting to a specific other computer in the network?

I have a desktop connected to the internet and to my home network through Wi-Fi, and a laptop connected to said desktop through an Ethernet cable. But Windows seems to only reach the laptop through Wi-...
3
votes
3answers
5k views

How to communicate with devices that have the same IP address

I have a situation where I need to communicate via telnet to multiple devices that have the same IP address. The context is that I am writing a "final test" of devices in a manufacturing facility. ...
1
vote
3answers
1k views

How do I wire a crossover cable to connect two devices together?

I need to make a ethernet crossover cable to connect two devices together. Anyone know the process to make one from scratch?
1
vote
2answers
5k views

How to bind applications to specific network adapter

I am currently using a computer in a corporate environment which is connected to the intranet through the ethernet adapter and to the internet through the wireless adapter. The problem is this: the ...
5
votes
1answer
949 views

What is the purpose of an Ethernet coupler that reverses all the pins?

As the photo shows, the pins are wired "straight across", rather than diagonally. This means that it does not work as an Ethernet/8P8C coupler because the transmit pins are mapped to unused pins (for ...
4
votes
4answers
8k views

What is IEEE 802.3 Ethernet's communication type: Synchronous or Asynchronous?

In the IEEE 802.3 frame structure there is a 7 byte preamble section for synchronization. If it is really for synchronization does that mean Ethernet is synchronous and not asynchronous? Ethernet ...