week 3,4

week3: What is preemptive scheduling?/ Preemptive scheduling is used when a process switches from running state to ready state or from the waiting state to ready state. The resources (mainly CPU cycles) are allocated to the process for a limited amount of time and then taken away, and the process is again placed back in the ready queue if that process still has CPU burst time remaining. That process stays in the ready queue till it gets its next chance to execute. / Preemptive schedulers are Round

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week 9

WEEK 9 round robin algorithm? How does it work?A scheduling algorithm which has a time quantum. After that set quantum time the process that was running is preempted and moved back to the arrival queue if it still has burst time remaining.demand paging?example of demand paging.Demand paging is a method of virtual memory management.Demand paging follows that pages should only be brought into memory if the executing process demands them. This is often referred to as lazy evaluation as only those pages

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security

 CIA Triad From Data Protection perspective:
Confidentiality ensures that data is protected from unauthorized disclosure. Integrity ensures that data is accurate and reliable. Availability ensures that data is accessible when and where it is needed.
Confidentiality Information confidentiality e.g., encrypting a medical record database and granting access only in the presence of proper authorization   Information existence confidentiality e.g., juvenile record

Integrity Must protect against changes

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cs

13.) To make VLANs work, configuration tables are needed in the bridges. What if the VLANs of the given Figure use hubs rather than switches? Do the hubs need configuration tables, too? Why or why not?
    No. Hubs just connect all the incoming lines together electrically. There is nothing to configure. No routing is done in a hub. Every frame coming into the hub goes out on all the other lines.
15.)Briefly describe the steps of the spanning-tree algorithm to compute the switch-network.
1. Elect
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Los Caza fantasma

Be recognized: A child is recognised as a person under the age of 18, unless national laws recognise an earlier age of majority. ARTICLE 2 Non-discrimination: All rights apply to all children without exception. It is the State’s obligation to protect children from any form of discrimination and to take positive action to promote their rights. ARTICLE 3 Adequate care : A child is recognised as a person under the age of 18, unless national laws recognise an earlier age of majority. ARTICLE 4 Implementation

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rr

bladder a membranous sac which holds or stores a secretion catheterisation to introduce a catheter into a person e.g. a urinary catheter chaperone someone who accompanies someone else especially during an intimate procedure cortex hard outer covering ESRF end stage renal failure erythrocyte red blood cell kidney an organ which helps maintain proper water and electrolyte balance and filters out wastes leucocyte white blood cell medulla centre or inner part of an organ renal failure condition where

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