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Consider a simple telephone network consisting of two end offices and one intermediate switch with a 1-MHz full-duplex trunk between each end office and the intermediate switch. Assume a 4-kHz channel for each voice call. The average telephone is used to make four calls per 8-hour workday, with a mean call duration of six minutes. Ten percent of the calls are long distance. What is the maximum number of telephones an end office can support?
What factors of the various UPS systems must concern you? What would you suggest as the lowest cost solution for this situation?
Suppose that the receiver computes the UDP checksum for the Internet department received UDP and finds that matches the value transferred to the checksum field.
Create a plan to set up a local area network. Design a boardroom-quality Microsoft® PowerPoint® presentation of 10-12 slides detailing your plan.
CBC-pad is a block chiper mode of operation used in RC5 block cipher, but it could be used in any block cipher. That is, if the original plaintext is an integer multiple of the block size, why not refrain from padding?
The latest member of the 802.11 family is 802.11n. What are some immediately noticeable differences between LANs and Wireless LANs?
You note that peak network utilization occurse at approximately noon, when most of your employees are on lunch break. What could be causing the speak activity?
Assume that sender sends silence suppressed RTP stream of G.711 audio to receiver (G.711 is the name of standard for 64Kbps PCM). Outline algorithm which uses sequence numbers and time stamps of RTP packets to find out beginning of new talk spurt?
Users are familiar with some network services like HTTP (Hypertext Transport Protocol) - Web, NNTP (Network News Transport Protocol). How do they figure into organizational security?
Louisiana, also must be connected to both Memphis and Laramie at a rate of 512 kbps? Which solution is cheaper now? How about considering an MPLS over IP solution or a form of long-haul Ethernet?"
How many IP addresses would they have per subnet?
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.
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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