Show Your Mac Address on Windows Vista OS

# Click the Start icon
# Click Control Panel
# Select Classic View
# Click Network and Sharing Center
# Select Manage Network Connections from the list on the left hand side
# Right click on the connection you are trying to find the MAC address for and select Properties – you will have a separate MAC address for your wireless card and your Ethernet (LAN) card. Make sure you use the correct one.

Show Mac Address on Windows 7 OS

# Click the Start icon
# Click Control Panel
# Select Network and Internet
# Click Network and Sharing Center
# Select Change Adapter Settings from the list on the left hand side
# Right click on the connection you are trying to find the MAC address for and select Properties
You will have a separate icon for your wireless card; your Ethernet (LAN) card and your Virtual WiFi MiniPort adapter (if you have one), each with their own MAC address. Make sure you select the correct one.

Show Mac Address on Microsoft Windows 2000 OS

1. Click the Start menu button on the Windows taskbar.
2. Click ‘Run…’ on this menu.
3. Type ‘cmd’ in the text box that appears. A command prompt window launches on the desktop.
4. In this command window, type ‘ipconfig /all’. Details are shown for each of the computer’s network adapters. Computers installed with VPN software or emulation software will possess one or more virtual adapters.
5. The ‘IP Address’ field states the current IP address for that network adapter.
6. The ‘Physical Address’ field states the MAC address for that adapter.

Show MAC Addresses (CatOS vs IOS)

When working with switches, it always helps to know what is connected to them. Switches work at the Data Link (MAC) Layer of the OSI Model (Layer 2) and any device that is connected to a switch has its own unique Layer 2 (MAC) address. The command you enter to view a switch’s MAC address is determined by what type of software (CatOS or IOS) the switch is running. Let’s take a look at each command:

CatOS
=====
show cam dynamic

IOS
===
show mac-address-table dynamic

What is ARP Cache

There are two types of ARP entries- static and dynamic. Most of the time, you will use dynamic ARP entries. What this means is that the ARP entry (the Ethernet MAC to IP address link) is kept on a device for some period of time, as long as it is being used. The opposite of a dynamic ARP entry is static ARP entry. With a static ARP entry, you are manually entering the link between the Ethernet MAC address and the IP address. Because of management headaches and the lack of significant negatives to using dynamic ARP entries, dynamic ARP entries are used most of the time.

So how is the dynamic ARP entry created? The answer is that the ARP protocol is used. Let’s say that a PC wants to communicate with host Myserver.Bluecrabfood.com. Before it can do that, it has to first resolve the hostname with the DNS server. Let’s say that it is successfully resolved to 10.10.10.10. Before the PC can communicate with that IP address, it must first resolve the IP address to the MAC address. To do this, it does an ARP request. This is a broadcast to the local LAN that says who has IP address 10.10.10.10 and what is your Ethernet MAC address? Say that server responds and says I have IP address 10.10.10.10 and my MAC address is 1234.4567.890A.

What is The Address Resolution Protocol (or ARP)

The Address Resolution Protocol (or ARP) is a very important part of IP networking. ARP is used to connect OSI Layer 3 (Network) to OSI Layer 2 (Data-Link). For most of us, that means that ARP is used to link our IP addressing to our Ethernet addressing (MAC Addressing). For you to communicate with any device on your network, you must have the Ethernet MAC address for that device. If the device is not on your LAN, you go through your default gateway (your router). In this case, your router will be the destination MAC address that your PC will communicate with.

Find Mac Address on Macintoshes OS 9

Macintoshes running OS 9 you can get the Airport Card MAC address by doing the following:

1. From the Apple Menu Control Panels, choose TCP/IP
2. From TCP/IP , choose connect via Airport (for Wireless) or Built in Ethernet (for Ethernet card)
3. From the FILE Menu, choose Get Info
4 A dialog box will pop up.
5. The MAC address will be listed next to HARDWARE ADDRESS. It will look like 00 50 E4 E6 A3 18

Macintoshes running OS X you can get the wireless MAC address by doing the following:

1. From the Apple Menu in the upper left choose System Preferences.
2. Choose the Network Preferences and select Airport (for Wireless) or Built in Ethernet (for Ethernet card) from the Show menu
3. The MAC address will be listed at the bottom of the TCP/IP tab as the “Airport ID” or “Ethernet Address”

Note: We need the 6 double digits that are for your Wireless Adapter, and for your Local Area Adapter (If you have Local Area Adapter Card)