Sunday, July 4, 2010

Network Basic - Continues

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MAC Address
- Media Access Control address (MAC address) is a unique identifier assigned to network adapters, similar to your unique Social Security Number.
Network Card – otherwise known as a network adapter, is a piece of computer hardware that enables computers to communicate to each other.
Network Bridge - A network bridge connects multiple network segments. Consider it to be like a traffic police man directing traffic in an intersection.
Network Switch – A network switch usually forwards all the traffic by using MAC addresses to differentiate between peers.
TCP/IP - The Transmission Control Protocol is one of the main protocols of the
Internet Protocol Suite, with which it works in tight integration. It’s like a computer program that makes the internet work.
Ethernet Cable – is a twisted pair (4 pairs) high signal integrity cable type with the RJ45. It is also known as CAT5 cable.

DHCP - DHCP basically takes care of various settings automatically, so you don’t have to read a 300 page book to set up a network.
WiFi - is a trademark of the Wi-Fi Alliance for products based on the IEEE 802.11 (W-LAN) standards. This certification warrants interoperability between different wireless devices. There are many variations of IEEE 802.11. The most important and current standards are contained in this table:
Name Frequency Release Date Speed Range(Indoors/Outdoors)
802.11N 2,4Ghz January 2010* 600 Mbits/s 38 Meters/250 Meters
802.11G 2,4Ghz June 2003 54 Mbits/s 70 Meters/140 Meters
802.11Y 3,7Ghz November 2008 54 Mbits/s 50 Meters/5000 Meters
802.11n is the standard most used today and is recommended if you’re trying to set up a wireless network. *The standard is set to be ratified in Jan 2010, all the currently available wireless routers are certified using Draft specifications.

Set up a local wired network
Setting up a wired network is not as common as it used to be a few years back.
Wired connections still have the best bandwidth and are not affected by common household RF(radio-frequency) interference. However, it can be inconvenient to install Ethernet cables around the house, so wireless is slowly gaining in popularity. If your house doesn’t have Ethernet cables in the walls and the appropriate wall plugs, you should consider the wireless alternative.

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