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satellite Internet An Internet access system that includes a special modem, satellite equipment, and a satellite dish to provide broadband Internet access. Upload speeds are significantly slower than other broadband technologies, but satellite Internet is usually available where no other broadband solutions exist. The only requirement is that the dish have a clear line-of-sight to the area of the sky in which the satellite is located. Secure Sockets Layer (SSL) An encryption algorithm used to secure network traffic; commonly used by secure Web servers. Server Message Block (SMB) A filesharing protocol that enables a network computer to access files located on other network computers. Windows XP supports the SMB protocol. server A network computer that performs an administrative function for the network. Some servers are responsible for authenticating the credentials of users who attempt to log on to the network, while others might hold applications and data and serve them to authenticated network users on demand. Simple File Sharing A new feature included in Windows XP that offers an easy way to configure the sharing of certain resources over the local area network so that other users can either read or have full access to shared resources. Simple File Sharing is enabled by default, but in Windows XP Professional, it can be disabled in favor of using more sophisticated NTFS permissions. It cannot be disabled in Windows XP Home Edition.

IEEE 802.11 is a shared WLAN standard using the carrier sense multiple access media access control protocol with collision avoidance. The standard allows for both direct sequence and frequency-hopping spread spectrum transmissions at the physical layer. The original 802.11 specification defines data rates of 1 Mbps and 2 Mbps and uses radio frequencies in the 2.4-GHz ISM (Industrial Scientific, and Medical) band. This standard, while still in effect, has been essentially supplanted by later specifications.

802.11b

The first major enhancement to the original IEEE 802.11 specification was the IEEE 802.11b specification adopted in 1999. It provides for standardization of the physical layer to support higher bandwidth than the original IEEE 802.11. IEEE 802.11b supports two additional speeds, 5.5 Mbps and 11 Mbps, using the same frequency of 2.45 GHz. A different modulation scheme is used to provide the higher data rates of 5 Mbps and 11 Mbps. Direct sequence spread spectrum (DSSS) is the physical layer defined in the 802.11b standard. 802.11b uses Complementary Code Keying (CCK) to achieve a maximum of 11 Mbps.

This chapter focused on installing Visual C# 2008 Express Edition. It addressed most issues that you might encounter during the installation, it covered different setup scenarios, and it provided links to MSDN for more help. After working through this chapter, you should now have the .NET Framework 3.5, Visual C# 2008 Express Edition, MSDN Express Library for Visual Studio 2008, SQL Server Compact 3.5, Silverlight 1.0, and SQL Server 2005 Express Edition installed and ready to go. Your computer should also be up-to-date with all updates installed and all security settings on green. Whenever you re ready to explore the integrated development environment (IDE) and write your first two applications, just jump to the next chapter.

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802.11a

The IEEE 802.11a standard, adopted in 1999, operates at a data transmission rate as high as 54 Mbps and uses radio frequencies in the 5-gigahertz (GHz) range. Instead of DSSS and CCK, which 802.11b uses, 802.11a uses Orthogonal Frequency Division Multiplexing (OFDM). ODFM allows data to be transmitted by sub-frequencies in parallel. This provides greater resistance to interference and provides greater throughput. This higher speed technology allows wireless networking to perform better for video and conferencing applications. Because they are not on the same frequencies as Bluetooth or microwave ovens, OFDM and IEEE 802.11a provide both a higher data rate and a cleaner signal.

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router A device that directs traffic between networks. A router examines the destination address for data and determines which of its remote network ports is best suited to receive that data. See also hub; switch.

802.11g

The IEEE 802.11g standard, adopted in 2003, operates at a data transmission rate as high as 54 Mbps and uses radio frequencies in the 2.4-gigahertz (GHz) ISM band, the same frequency as 802.11b. Instead of DSSS and CCK, which 802.11b uses, 802.11g uses Orthogonal Frequency Division Multiplexing (OFDM) and Packet Binary Convolution Coding (PBCC). Using ODFM, the IEEE 802.11g standard supports a maximum speed of 54 Mbps. The IEEE 802.11g standard provides for backward compatibility with the 802.11b standard, enabling easy deployment into existing 802.11b networks.