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Several graphic files were transmitted via e-mail from an unknown source to a suspect in an ongoing investigation. The lead investigator gives you these graphics files and tells you that at least four messages should be embedded in them. Use your problem solving and brainstorming skills to determine a procedure to follow.
Consider compressed video transmission in an ATM network. Suppose standard ATM cells must be transmitted through five switches. The data rate is 43Mbps. What is the transmission time for one cell through one switch?
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.
8 bits for quantisation of each pixel. What's the required bandwidth for the transmission of the uncompressed video stream?
Use problem-solving and brainstorming skills to find a procedure to follow. Write a short report outlining what to do.
Determine the decryption function. What is the decrypted plaintext?
Explain to your team the differences between routers and switches. Compare them and list the pros and cons of using each type of hardware.
Assume nodes A and Bare on the same 10 Mbps Ethernet bus, and the propagation delay between the two nodes is 325 bit times. The answer is no, if B 's signal reaches A before bit time t = 512 + 64 bits. In the worst case, when does B's signal reach A?
"Choose one of the key terms ie TCP/IP protocol, File transfer protocol,OSI model,wireless workstation) and write a paper about it. Apply the following criteria:
If IPSec gives security at network layer, why is it that security mechanisms are still require at layers above IP?
You decide to carry out an investigation. Write a plan for this investigation. The plan should include: digital evidence source identification, recovery, collection, documentation, and report.
Find out how many users a cell can support for a 5% call---blocking rate. Assume that each user produces 35mE of load in the busy hour.
List three reasons you might still want to prevent an outsider obtaining free network access by intruding into your wireless network.
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