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An interesting emerging market is using Internet phone and a company's high speed LAN to replace the same company's PBX. Write a report on this issue. Cover the following questions in your report: a. What is a PBX? b. Consider a call between a user in the company and another user out of the company who is connected to a traditional telephone network. What sort of technology is needed at the interface between the LAN and the traditional telephone network? c. In addition to Internet phone software and the interface in Part b (above) what else is needed to replace the PBX?
You are the network administrator for a small manufacturing firm that runs Ethernet. You are currently using hubs and repeaters for connectivity but have decided to upgrade to a Layer 2 (L2) switched infrastructure.
Is Nmap able to recognize operating system running on each system? Is there any Nmap feature which can be utilized to guess OS of host?
It has already decided to use Windows Server 2003 network operating system. What type of LAN will your team design for this company?
The topics above are linked to each other and the question, they are not independent of each other. They are provided as a minimal guide only. Do not simply write an unconnected paragraph on each without linking the concepts together.
Application Architecture. You have been tasked with building a payroll program for a large organization with offices spread across the United States.
When a message travels from source to destination through two routers, how many times the message M is modified before it reaches to the destination as M. Show your work to determine this number.
Consider improved version of Vigenere cipher, where instead of using multiple shift ciphers, multiple mono-alphabetic substitution ciphers are used.
The following are the four main wireless technologies used to access various network resources: Radio wave, Infrared. Explain three advantages and three disadvantages of each of these wireless technologies.
Particular cipher is implemented by combining ASCII representation of plaintext characters with pseudorandom bytes (eight-bit binary strings of 1s and 0s) using XOR function.
Do you believe that any form of document content validation must be applied to web pages before they are placed in public domain? That is, some form of assurance that they don't contain completely incorrect information.
Find out whether it's configured to transfer data at 10 Mbps rather than 100 Mbps, as it should be. How could you find this information and change it, if necessary?
Router on one of the subnets will connect network to Internet. All computers on network will require access to the Internet. Determine the correct subnet mask for network?
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