Stack Overflow
Stack Overflow

Questions tagged [mac-address]

A Media Access Control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment.

A MAC address is a 48 bit identifier assigned to every device connected to a network. They are normally written as 6 octets displayed as hexadecimal digits, for example 08:01:27:0E:25:B8. The first 3 octets identify the manufacturer, the last 3 are to ensure that each address for that manufacturer is unique.

MAC addresses are used for numerous network technologies and most IEEE 802 network technologies, including Ethernet. Logically, MAC addresses are used in the Media Access Control protocol sub-layer of the OSI reference model.

1056 questions
-1
votes
2 answers

Formating a MAC Address in WinForms

Using one of my WinForms applications, I need to display the MAC address of the computer's various network adapters in a textbox. This code works fine in getting the string: public string AdapterAddress(string criteria) { adapteraddress = (from…
Colin Docherty
  • 111
  • 7
-1
votes
2 answers

Get wired MAC address from computer/server

I am thinking about using the wired MAC-adr as a unique value in a program. So i need to be sure the MAC-adr is the wired one and NOT the wireless. $mac = gwmi -computer $compname win32_NetworkAdapterConfiguration | select MACAddress This is what I…
haakonlu
  • 949
  • 3
  • 13
  • 25
-2
votes
1 answer

Why can't we route data with mac addresses?

I am studying for my CCNA, and I was wondering why we can't route packets between networks with MAC addresses. Is it theoretically possible to know the location of every computer on the internet, and have switches (possibly at an ISP), that know…
oli2
  • 73
  • 1
  • 7
-2
votes
1 answer

How do I prevent users from logging on multiple devices php

I tired so many solutions but nothing worked, I tried using clients mac address as unique device id for the user then checking once logging process started that this mac address is allowed mac address stored in then database. this was the code…
Qarni Technology
  • 1
-2
votes
1 answer

How to convert a mac adress (hex) to [3]byte and pass it to the ValidMACPrefixMap

I have a bunch of mac addresses which i need to conclude their's vendor (the vendor number is the first 6 digits of a mac address). I am willing to do that by using the built in validMACPrefixMap which maps[3]byte (dec of the first 6 hex digits of…
ibrahimab
  • 1
  • 1
-2
votes
1 answer

Why is there separate need for Mac Address?

I know that router assign private ip address to devices that are connected to it wirelessly. Then, why is there need of Mac Address since devices can be distinguished by private ip assigned to them. Or Mac Address is used to distinguish type of…
Mohit Bansal
  • 1
  • 1
-2
votes
1 answer

Get MAC address from VLAN1 from server on VLAN2

got a networking question for everyone. Got VOIP phones on VLAN1. Got a server on VLAN2. So using a layer 2 switch is it possible to get the MAC address using ARP from a phone on VLAN1 from the server on VLAN2 ? My research says it needs a…
Alex
  • 25
  • 4
-2
votes
2 answers

how to accept a mac address from input and print next three macaddress in python

I am new to Python and coding. My requirement is simple. I will prompt the user for a macaddress. When it is entered, I will print the next 3 mac addresses. For example if the mac address entered is 00:00:00:00:00:00, I should be able to print next…
Abhi
  • 7
  • 2
-2
votes
3 answers

Shell script run with mac address validate

Can we run shell script with check system mac address validation then process. #!/bin/bash ### here i need to check system mac address ### if mac is not match then script will not run killall gnome-terminal echo "End Of Day Session Complete" plz…
hastimalsuthar
  • 1
  • 1
  • 3
-2
votes
1 answer

Physical address vs virtual address

It's possible to generate a physical address by a virtual machine such that when real and virtual machine are connected to the network, nobody in the network can determine which one is a virtual address?
Questioner
  • 662
  • 1
  • 10
  • 26
-2
votes
3 answers

Mac address for android 6.0 and above shows null

I am using this code to get MAC ADDRESS and display it in my app. The code works fine for all devices except most latest devices and ANDROID BOX. it shows null for ANDROID BOX and other latest device. Here is code: public static String…
Pir Fahim Shah
  • 10,505
  • 1
  • 82
  • 81
-2
votes
1 answer

Is it possible to edit the cover-area of my wifi?

I have 3 wifi shared by 3 different computers. I want to change the cover-area of the WIFI signal so that those 3 area have not overlap to each other. Is it possible to change the cover-area? (i.e. edit the signal radius by software / some…
Steve Lai
  • 633
  • 1
  • 7
  • 18
-2
votes
1 answer

Which Mac address should be used in Ethernet Header?

Consider that we are working on a Local Area (LAN). In this case, I use the mac address of the destination device for destination MAC address for ethernet header. This is working. But, I don't know, which Mac address should be used on Global Network…
mehmetfa
  • 199
  • 3
  • 15
-2
votes
1 answer

How are MAC/IP Addresses used in routing

I have to teach my sixth form about MAC Addresses and IP Addresses in a few weeks time and there are some areas I am unclear on which I am hoping some of you will be able to clarify for me. So as I understand it the following happens when a device…
Robert Flook
  • 307
  • 6
  • 12
-2
votes
1 answer

Send and recive packet in the LAN with multiple MAC addresses in C#

In our network the bandwidth is assigned to MAC address and if you can get more than one, you can get more bandwidth :) Is there any application or class in C# that can do this? I already have the HTTP proxy or port mapper to send packets in…
MGH
  • 11
1 2 3
…
70 71