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 Wysłany: Śro 7:27, 26 Sty 2011 Temat postu: Creatures Living In The Sea. |
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| Creatures Living In The Sea. (MUSIC)VOICE TWO: This SCIENCE IN THE NEWS Program Was Written By Lawan Davis And Brianna Blake, who Also Was Our Producer. I'm Barbara Klein. VOICE ONE: And I'm Steve Ember. Join Us Again Next Week For More News About Science In Special English On The Voice Of America. Wireless Networking, Part 1: Capabilities and HardwareThese days it isn't uncommon for a home to have multiple personal computers, and as such, it just makes sense for them to be able to share files, as well as to share one Internet connection. Wired networking is an option, but it is one that may require the installation and management of a great deal of wiring in order to get even a modestly sized home set up. With wireless networking equipment becoming extremely affordable and easy to install, it may be worth considering by those looking to build a home network, as well as by those looking to expand on an existing wired network.The first installment in this two-part series of Tech Tips will provide an introduction to the basic capabilities and hardware involved in wireless networking. Once that foundation has been established, we'll take a look at a few setup and security related considerations that should be addressed once the physical installation is complete.CapabilitiesThe basic standard that covers wireless networking is the Institute for Electrical and Electronics Engineers' (IEEE) 802.11, which is close kin to the wired Ethernet standard, 802.3. Many people will recognize 802.11 more readily when accompanied by one of three suffixes (a, b, or g), used to specify the exact protocol of wireless networking.The 802.11a protocol first hit the scene in 2001, and despite a small surge in recent popularity, it is definitely the least common of the three at this time. The signals are transmitted on a 5 GHz radio frequency, while "b" and "g" travel on 2.4 GHz. The higher freq |
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