Recently, I came across this Nimbus technical computing service somewhere online. According to the Nimbis website, they offer a host of services to the public. What caught my attention was the service relating to supercomputing. What I would like to know is, have you tried any of Nimbis’ service and did you find it reliable and would you recommend their services to anyone?

What is firewall detection? What could be some legitimate reasons to detect the presence of a firewall on your computer? How can you detect the presence of a firewall in your system? What is a false positive in context of a firewall? What is a false negative in the same context?

What is an Intrusion detection system? What are the different types of Intrusion detection systems available? How does each of these work to protect network security? What are the basic variants that are integral to both systems? Where in the network are anti threat devices employed in each of these systems?

How does webmail and email client differ in the way they function? What is the difference between the Post Office Protocol (POP3) and the Internet Message Access Protocol (IMAP) Mail Server? What is the difference in the way, each of these works? What are the benefits of IMAP? What are its drawbacks?

What is Address Resolution Protocol (ARP)? What is Reverse Address resolution protocol (RARP)? What is the difference between these two protocols? How does each of these work? Where are these protocols used? What are the drawbacks of RARP? What is the Internet Control Message Protocol (ICMP)? What is it used for?

A company runs across multiple locations and would like to set up a Virtual Private Network between too many branches. With reference to the statement explain what is a VPN? How can the above scenario be achieved? What are the benefits of such a network being created?What is a VPN concentrator ?

The first thing I would like to know about this curious project management software is, can you download it for free? In which fields is it more useful to apply this management software? How do you use Redmine. How do you configure it? Have you found it a great project management tool so far? Has it saved you time on your projects and made life easy for you?

What is grid computing and how do you learn the ropes? How do they connect computers together in order to get grid computing? What is the minimum hardware requirement for building a grid computing system and is there a limit to the number of people who can connect to the grid in order to use the facilities available?

What are data centers and how do they operate?

What expertise goes into managing data centers across the world? Are there particular guidelines for every data centre to follow regardless of which country is hosting the data centre? If I want to build a data center what things must I consider carefully before embarking on such a monumental project?

I need a very comprehensive tutorial on High Performance Computing. Where can I get extensive resource on HPC? Could you please provide some links for me to access these resources? What in your opinion is the best course of action for me to take to improve upon my skills in dealing with problems requiring the use of HPC?