Lexmark X4650 Network Guide - Page 17

What is a MAC address?, How do I find the MAC address?

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Page 17 highlights

Scenario 2: Desktop computer, laptop, and printer connected wirelessly with Internet • A desktop computer, a laptop, and a printer are connected wirelessly to a wireless router. • The network is connected to the Internet through a DSL or a cable modem. Internet Scenario 3: Desktop computer, laptop, and printer connected wirelessly without Internet • A desktop computer, a laptop, and a printer are connected wirelessly to a wireless access point (wireless router). • The network has no connection to the Internet. Scenario 4: Laptop connected wirelessly to printer without Internet • A laptop is directly connected wirelessly to a printer without going through a wireless router. • The network has no connection to the Internet. • This configuration is referred to as an ad hoc network. What is a MAC address? A Media Access Control (MAC) address is a 48-bit identifier associated with the hardware of network equipment. The MAC address may also be called the physical address because it is connected to the hardware of a device instead of its software. The MAC address is displayed as a hexadecimal number in this format: 01-23-45-67-89-AB. Every device capable of communicating on a network has a MAC address. Network printers, computers, and routers, whether Ethernet or wireless, all have MAC addresses. While it is possible to change the MAC address of a network device, it is not common practice to do so. For this reason, MAC addresses are considered permanent. IP addresses are easily changed, so MAC addresses are a more reliable method of identifying a specific device on a network. Routers with security capabilities may allow filtering of MAC addresses on networks. This allows a managed list of devices to access the network, identified by their MAC addresses. MAC address filtering can help prevent access on the network from unwanted devices, such as from intruders on a wireless network. MAC address filtering can also prevent legitimate access if you forget to add a new device to the router's list of allowed addresses. If your network uses MAC address filtering, be sure to add the MAC address of the printer to the list of allowed devices. How do I find the MAC address? Most network equipment has a unique hardware identification number to distinguish it from other devices on the network. This is called the Media Access Control (MAC) address. 17

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Scenario 2: Desktop computer, laptop, and printer connected wirelessly with
Internet
•
A desktop computer, a laptop, and a printer are connected wirelessly to a wireless router.
•
The network is connected to the Internet through a DSL or a cable modem.
Internet
Scenario 3: Desktop computer, laptop, and printer connected wirelessly
without Internet
•
A desktop computer, a laptop, and a printer are connected wirelessly to a wireless access point (wireless
router).
•
The network has no connection to the Internet.
Scenario 4: Laptop connected wirelessly to printer without Internet
•
A laptop is directly connected wirelessly to a printer without going through a wireless router.
•
The network has no connection to the Internet.
•
This configuration is referred to as an ad hoc network.
What is a MAC address?
A Media Access Control (MAC) address is a 48-bit identifier associated with the hardware of network
equipment. The MAC address may also be called the physical address because it is connected to the
hardware of a device instead of its software. The MAC address is displayed as a hexadecimal number in
this format: 01-23-45-67-89-AB.
Every device capable of communicating on a network has a MAC address. Network printers, computers,
and routers, whether Ethernet or wireless, all have MAC addresses.
While it is possible to change the MAC address of a network device, it is not common practice to do so. For
this reason, MAC addresses are considered permanent. IP addresses are easily changed, so MAC addresses
are a more reliable method of identifying a specific device on a network.
Routers with security capabilities may allow filtering of MAC addresses on networks. This allows a managed
list of devices to access the network, identified by their MAC addresses. MAC address filtering can help
prevent access on the network from unwanted devices, such as from intruders on a wireless network. MAC
address filtering can also prevent legitimate access if you forget to add a new device to the router's list of
allowed addresses. If your network uses MAC address filtering, be sure to add the MAC address of the
printer to the list of allowed devices.
How do I find the MAC address?
Most network equipment has a unique hardware identification number to distinguish it from other devices
on the network. This is called the
Media Access Control
(MAC) address.
17