Last Name: Coots First Name: Austin

1. At what frequency ranges do the IEEE 802.11 b/a/g/n standards transmit? What is important about these different frequencies? * IEEE 802.11 b transmits using 2.4 GHz signals. * IEEE 802.11 a transmits using 5 GHz signals. * IEEE 802.11 g transmits using 2.4 GHz signals. * IEEE 802.11 n transmits using MIMO or multiple in multiple out technique. * These frequencies are important when choosing which protocol you want to use. The lower frequencies can transmit longer distances and require less battery while the lower frequencies transmit longer distances but can drain the battery of the workstation. 2. Your wireless LAN device has just sent a request to send (RTS). What happens next? * A timer is set and then, hopefully a clear to send (CTS) will be received from the access point before the timer runs out. 3. Your company wants to create a wireless network for the entire office building. The building is 10 stories high, and the company wants to incorporate IEEE 802.11a by placing one access point on the tenth floor. Will this layout work? Explain. * No because the 5 GHz protocols have a short transmission distance (approximately 30 meters) and this frequency has trouble transmitting through walls and floors. If you wanted to use the IEEE 802.11 a you would need multiple access points which would increase costs. 4. You want to create a local area network that protects the contents of the network server’s hard disks from disk crashes. List all the different techniques for providing this protection that have been presented thus far. * These are all RAID (Redundant Array of Independent Disks) techniques. * RAID 0-Stripping- Data is broken into pieces and each piece stored on different disk drives * RAID 1-Disk Monitoring- Data is stored on at least two disk drives to provide redundancy * RAID 3 – Data is redundantly stored and error checking information is kept on a separate disk * RAID 5 – Data is striped and stored across three or more disks with parity information. 5. In what ways are Unix and Linux similar? In what ways are they different? * One similarity is the fast execution of the operating system due to the small and efficient code. The two also perform in very similar ways seeing as Linux is a version of UNIX. The major difference in the two is the cost. Linux is free if downloaded from the internet and tons cheaper even if it is not. You also receive the source code with Linux that can be modified however you would like. This can be a huge advantage if you have an experienced programmer. 6. Why is the stability of Linux so high when compared to other network operating systems? * The size of the code is so small you don’t have to have a great processor to run it and there are also fewer things that can go wrong with such a short source code. 7. If it is important not to lose any of your data, which RAID technique would you suggest using? * RAID-5 because the data is stored across at least three disks and parity information is sent along with the data. 8. Is a thin client computer more advantageous in a corporate setting or in a user’s home? Explain. * Corporate because there is a need for a server to download software and it is not practical to have that kind of server in a home or to go through the trouble of downloading the software to the server then the thin client if you’re at home. 9. What kind of software applications might a company consider as likely candidates for a site license? * My first thought is a school. They need the software on multiple computers that are all in one geographical area. This would help reduce cost for the school and they wouldn’t have to worry about a counter whenever they needed a copy of the software. 10. Windows 2000/2003/2008 uses Active Directory for its directory service, and NetWare uses NDS. How are the two directory services alike? How are they different? * They are alike because they both store information about the network and make that information available. They both also use a form of hierarchy within the directory. One difference is that Active Directory is built around the Internet’s Domain Name System (DNS) and Lightweight Directory Access Protocol (LDAP).