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stateless packet filteringstateless or static packet filtering is the most straightforward kind of packet filtering that allows or disallows data
packet filtering firewallpacket filtering is a network security mechanism that works by controlling what data can flow in and out of the network the
screened subnet architecturethis setup provides an extra security layer to screened host architecture by creating a perimeter subnet which further
screened host architecturethis architecture consists of two host machines a screening router and a screening host screening router is placed between
dual homed host architecturethis setup consists of a host machine with two or more ip addresses for each of its physical port one port is connected
screening routerin this setup network router acts as a firewall it checks all incoming and outgoing packets according to the predefined rules this
how does a firewall protectfirewalls work by controlling the information that comes in and out of the network by using the application proxy service
firewall is a device or a component that restricts access between a protected or an internal network from an external or untrustworthy network a
firewallsfirewalls emerged as a new technology in 1990s but its idea was present near two decades back historical context of firewall is quite
parts count methodthis prediction method is applicable at preliminary stages during bid proposal and early design phases when insufficient
introductionreliability prediction is an important method for evaluating a system design right from its
fault tree construction rulesa define the undesired fault condition as the top event the fault event describes
fault tree analysisreliability engineering in a nutshell is concerned with failures how failures occur how often they occur and how to
role of design in achieving reliabilityone of the most important methods for achieving high reliability is through design use reliability cannot
infant mortality periodinitially there are a large number of failures called initial failures or infant mortality these failures are primarily due to
causes of failuresevery failure has a well-defined cause any system or device has an inherent strength or capacity to resist failures this
1 a systematic study of failures will help in identifying areas that may cause i loss of adjacent parts equipment whole equipmentii loss
the progress of any industry and indeed countries as well today is linked to the effective performance of its equipments processes and systems
reliability is the probability of success where success is defined as compliance to specified requirements a system or an item is considered reliable
power supply system in satellite systemsatellite earth station relies on the public power supply system two generators 11 of 250 kva each in
application of satellite communication started with the installation and commissioning of std- ldquobrdquo earth station having 11m diameter antenna
questionwrite a program to find the area under the curve y fx between x a and x b integrate y fx between the limits of a and b the area under a
beladys anomalyalso known fifo anomaly generally on raising the number of frames given to a process virtual storage the program execution is faster
data units at different layers of the tcp ip protocol suitethe data unit prepared at the application layer is known a message at the transport layer
problem 1- alice bob and charlie have a secret key a3 b4 c5 respectively- they want to find a common secret key using diffie-hellan key exchange