Exercise 3

1. Explain DNS and DHCP. How does DNS differ from DCHP configuration?

DNS is Domain Name System that it translate domain name into IP addresses. Because, DNS is alphabetic, so the user can understand easier than IP address. DHCP is Dynamic Host Configuration Protocol, a protocol for assigning dynamic IP address to devices on a network. With dynamic addressing, a device can have different IP address every time it connects to the network. DHCP also supports a mix of static and dynamic IP addresses (Cheryl, n.d.).

The difference between DNS and DCHP is that DNS is a name serving address such as Yahoo.com = 123.45.67.8900 and DHCP is only used on a network that contains no DNS naming, such as a cable modem has a DHCP address built into to allow systems to connect to it and give it an internal IP address like 192.168.1.100 where as DNS is an external IP address to find other systems.

2.Why is it important for your online business application to use a static IP address rather than have it dynamically assigned?

As static IP never changes in the internet environment, a specific PC can be accessed and controlled and maintained from any place. With a static IP address your machine is more easily accessible by non-Window internet services (Cheryl, n.d.). This is not a significant advantage as people seldom telnet to their Window PC. Businesses can see better growth and be in touch with their customers when they have their own websites. Online business can create own mail address with the domain name. If the email account has some unique identity, they make a huge difference and become an important part of better management of businesses (Cheryl, n.d.).

3. What role can the following play in business-to-business e-commerce?

a) Virtual Private Network (VPN) or Grid computing services

Virtual Private Network (VPN) or Grid computing services: As companies become more decentralized, they find themselves with employees all over the country and around the world. Increasingly, these workers need the same access to corporate information as those still at headquarters (Tyson, n.d.).

b) Next generation of wireless mesh networks

Wireless links are dynamically established between access points, creating a self-organized and self-healing wireless mesh network that provides data connectivity in even the hardest to reach areas of your business. Business applications for mesh networks exist in a wide variety of settings and industries, including corporate campuses, industrial and manufacturing environments, hotels, healthcare facilities, retail stores, and logistics warehouses (Wang & Kiyon, 2005).

c) Cloud or Social Cloud applications.

Cloud or Social Cloud applications: Running applications in an Internet server or downloading the software from the Internet each time it is used. The phrase "in the cloud" may refer to a company's own network, but the term "cloud computing" almost always refers to the Internet and the use of Web browser-based or rich client applications internet (Winans & Brown, 2009).

4. “If clouding computing is the “black box”, then grid computing is a component as the “white box”.

Explain what you interpret about that statement.

Cloud computing is a style of computing in which dynamically scalable and often virtualized resources are provide as a service over the internet (Winans & Brown, 2009). Grid computing is the combination of computer resources from multiple administrative domains applied to a common task, usually to a scientific, technical or business problem that requires a great number of computer processing cycles or the need to process large amounts of data.

References

Tyson, J.(n.d.). How Virtual Private Networks Work. Retrieved March 26, 2010 from http://www.howstuffworks.com/vpn.htm

Winans, T., & Brown, J. (2009). Cloud Computing. Retrieved March 26, 2010 from http://www.johnseelybrown.com/cloudcomputingpapers.pdf

Wang, X., & Kiyon. (2005).A Survey on Wireless Mesh Networks. Retrieved March 29, 2010 from http://users.ece.gatech.edu/~wxudong/Xudong_Wang_commesh.pdf

Cheryl.(n.d.).What’s Better: Dynamic or Static IP Address?. Retrieved March 26, 2010 from http://www.ghacks.net/2008/10/12/what%E2%80%99s-better-dynamic-or-static-ip-address/