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Question1. Consider Figure 5.26. Assume that all links are one hundred Mbps. Determine the maximum total aggregate throughput that can be achieved among the 9 hosts and 2 servers in the network? You can assume that any host or server can send to any other host or server. Why?
Question2. In this problem, we explore the use of small packets for Voice-over IP applications. One of the drawbacks of a small packet size is that the large fraction of link bandwidth is consumed by overhead bytes. To this end, suppose that the packet consists of P bytes and 5 bytes of header.a. Consider sending a digitally encoded voice source directly. Suppose the source is encoded at a constant rate of 128 kbps. Assume each packet is entirely filled before the source sends the packet into the network. The time required to fill a packet is the packetization delay. In terms of L, determine the packetization delay in milliseconds.b. Packetization delays greater than 20 msec can cause a noticeable and unpleasant echo. Determine the packetization delay for L = 1,500 bytes (roughly corresponding to a maximum-sized Ethernet packet) and for L = 50 (corresponding to an ATM packet).c. Calculate the store-and-forward delay at a single switch for a link rate of R = 622 Mbps for L = 1,500 bytes, and for L = 50 bytes.d. Comment on the advantages of using a small packet size.
The final security measure my company implements well is monitoring internet usage through limiting the access for most workers to search websites that are not related to the company.
Qqueue for service (if the server process is busy servicing another request). Requests in queue are served according to the scheduling policy in use: First-In-First-Out (FIFO) scheduling.
Write two challenges an OS faces when passing parameters between user and kernel mode. Describe how an OS can overcome them
Discuss and explian wired and wireless media along with the drawbacks and benefits of each also Discuss the channel signaling systems used in voice communication along with the drawbacks and benefits of each.
With the help of graphics program, design many security awareness posters on the following themes, updating antivirus signatures, watching out for e-mail viruses.
How many page faults would occur under pure demand paging (all frames are initially empty), assuming four frames are available, under FIFO, LRU.
What is the difference between a safe state and an unsafe state in a deadlock-avoidance system?
Construct a table for consumer. The manager tells me that this table needs to track the following data: all consumers' social security number, first and last name, address, city,
Explain the techniques that will be used to monitor implementation of the electronic medical record.
Suppose you have decided to buy a personal computer system for personal use and wish to be able to do the following tasks on the computer,
Every day at 2PM a client's computer at work reboots itself. You have made sure the power management settings in the BIOS and in the Windows Control Panel are not responsible.
Determine how long does it take to transmit a 10baseT Ethernet frame that contains 256 bytes of data and ignore all the interframe gap that follows the frame.
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