Business Data Communication
•A total of six (6) questions. There will be four (4) design/troubleshooting questions and two (2) case study questions that involve applying multiple concepts we have studied.
Question 1.
A friend is interested in installing a wireless LAN in her small business. She has approximately 15 employees who primarily use office automation applications with printers. They do require access to the Internet. The phone system is independent from the data network.
Design a cost effective wireless network option that would provide adequate bandwidth for the business needs, keeping in mind your friend is very concerned about security associated with wireless networks.
Question 2.
For security reasons, many organizations do not allow error reply messages to leave their internal Internets. Specify how could hackers use information in echo reply messages to learn about the firm′s internal hosts? What can they do with this information that could be harmful to the firm?
Question 3.
Two switches are 800 feet apart. They need to communicate at 2.1 Gbps. What network design do you recommend? Justify your answer.
Question 4.
Two switches are 250 meters apart. They need to communicate at 1.6 Gbps. What network design do you recommend? Justify your answer.
Question 5.
You try to access Skype but get no response. List the possible causes and describe how you would test each cause.
Question 6.
Consider a one-story building that is a square. It will have an access point in each corner and one in the center of the square. All access points can hear one another.
a. Assign access point channels to the five access points if you are using 802.11 n. try not to have any access points that can hear each other on the same channel. Available channels are 2, 3, and 9.
b. Were you able to eliminate interference between access points?
c. Repeat the first two parts of the questions, this time using 802.11 a. Available channels are 31, 41, 48, 51, 55, 61, 64, 149, 158, 159, and 161, but many NICs and access points only support channels below 100.