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With the Open Source nature of PHP, and the fact that it implements some very sophisticated server-side scripting, do you see any problems with using PHP in secure environments? Discuss this in relation to server security, the continuing trend to eCommerce and the continual rise in popularity of PHP as a solution to eCommerce applications.
two hosts, A and B, are separated by 20,000 kilometers and are connected by a link of R=2 Mbps, and there are 4 routers between A and B. Suppose the propagation speed over the link is 2.5*108 meters/sec, average queueing time is 2ms,
It takes 56 milliseconds for workstation to decode each received frame and display it on screen. Will this workstation display video stream successfully? Why or why not?
Describe whether or not your network design will support dial-up or VPN remote access by using descriptions of following aspects: advantages and disadvantages of remote access solution.
Network simulation on Hierarchical Network Rerouting against wormhole attacks
In the meantime, CEO of the first company transmits e-mail to CEO of second company in order to provide a couple suggestions related to the joint venture. Explain whether this scenario follow OSI model? Describe it in detail.
Computed hash value for the message. Alice is able to intercept message, and generates alternative message that has a hash value that collides with Bob's original hash value. Show.
Explain whether this is still true today, and write down factors are moving wireless NICs into more dominant role, if any.
Provided that both the design shop and front office utilizes areas? What medium guarantees immunity from the interference?
When searching for files in an unstructured peer- to-peer system, it may help to restrict the search to nodes that have files similar to yours. Explain how gossiping can help to find those nodes.
A computer using direct mapped cache has 2^24 words of main memory and a cache of 256 blocks. Every cache block contains sixty-four words.
Router X does not receive any update for another 90s. How many periodic, expiration and garbage collection timersare now running in router X?
Your boss has just heard about some nefarious computer activities known as ping sweeps and port scans. He wishesto know more about them and what the impact of these activities might be on company.
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