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WiMAX
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MAC: What is MAC Address?
WiMAX
more details
MAC: What is MAC Address?
MAC, Media Access Control, address is a globally unique identifier assigned to network devices, and therefore it is often referred to as hardware or physical address. MAC addresses are 6-byte (48-bits) in length, and are written in MM:MM:MM:SS:SS:SS format. The first 3-bytes are ID number of the manufacturer, which is assigned by an Internet standards body. The second 3-bytes are serial number assigned by the manufacturer.
MAC layer represents layer 2 of the TCP/IP (adopted from OSI Reference Model), where IP represents layer 3. MAC address can be thought of as supporting hardware implementation whereas IP address supports software implementation. MAC addresses are permanently burned into hardware by hardware manufacturer, but IP addresses are assigned to the network devices by a network adminstrator. DHCP relies on MAC address to assign IP addresses to network devices.
How do I find a MAC address of network device?
Operating Systems support various command-line and GUI utilities to allow users to find MAC address of the system. On Unix variants including Solaris and Linux support "ifconfig -a", "ip link list" or "ip address show" command that displays MAC address of the network device among other useful information. Windows including NT, 2000, XP and 2003 support"ipconfig /all" command that displays MAC address. On a MacOS, one can find MAC address by opening "System Preferences", then selecting "Network".
Mobile phones: 1G 2G 3G 4G
1G
1G is short for first-generation wireless telephone technology. This generation of phones and networks is represented by the brick-sized analog phones introduced in the 1980’s. Subsequent numbers refer to newer and upcoming technology.
1G is short for first-generation wireless telephone technology. This generation of phones and networks is represented by the brick-sized analog phones introduced in the 1980’s. Subsequent numbers refer to newer and upcoming technology.
2G
2G phones use digital networks. Going all-digital allowed for the introduction of digital data services, such as SMS and email. 2G networks and their digital nature also made it more difficult to eavesdrop on mobile phone calls.
2G phones use digital networks. Going all-digital allowed for the introduction of digital data services, such as SMS and email. 2G networks and their digital nature also made it more difficult to eavesdrop on mobile phone calls.
3G
3G networks are an in between standard. 3G is seen more as pre4G instead of a standard of its own. The advantage 3G networks have over 2G networks is speed. 3G networks are built to handle the needs of today’s wireless users. This standard of wireless networks increases the speed of internet browsing, picture and video messaging, and handheld GPS use.
3G networks are an in between standard. 3G is seen more as pre4G instead of a standard of its own. The advantage 3G networks have over 2G networks is speed. 3G networks are built to handle the needs of today’s wireless users. This standard of wireless networks increases the speed of internet browsing, picture and video messaging, and handheld GPS use.
4G
4G ( Beyond 3G) is like the other generations in that its advantage lies in promised increased speeds in data transmission. There is currently no formal definition for 4G, but there are objectives. One of these objectives is for 4G to become a fully IP-based system, much like modern computer networks. The supposed speeds for 4G will be between 100 Mbit/s and 1 Gbit/s.
4G ( Beyond 3G) is like the other generations in that its advantage lies in promised increased speeds in data transmission. There is currently no formal definition for 4G, but there are objectives. One of these objectives is for 4G to become a fully IP-based system, much like modern computer networks. The supposed speeds for 4G will be between 100 Mbit/s and 1 Gbit/s.
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