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Screening Router
In this setup network router acts as a firewall. It checks all incoming and outgoing packets according to the predefined rules. This filter is placed at the connecting point to the external network. Clients on local network and on the Internet are allowed to communicate directly but their communication is restricted to the type allowed by the router. As router is needed for connecting to the Internet so this firewall is almost free .
Advantages
• Cheapest, simple and transparent • Router could be replaced with some intelligent system to provide better access control
Disadvantages
• Requires complex filtering rules and hence error-prone• Fine grained access control is near impossible• Cannot add authentication system• If router is compromised somehow then security is at risk
List the advantages of ARCNet. Here are some of the ARCNet's benefits: 1. It is extremely reliable. 2. ARCNet is simple to install and troubleshoot. 3. It has an exce
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You have been asked to design a Banking Network with two primary types of locations. Branches that will have 3 subnets, one /25 subnet one /26 subnet for ABMS and one /26 s
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Virtual channel is normally a link from one source to one destination, although multicast connections are also allowed. The other name for virtual channel is virtual circuit.
Besides these hardware overheads, there are certain software overheads imposed by libraries, parallel compilers, tools and operating systems. The parallel programming languages
Question: The input to the circuit in the figure is a square wave that is symmetrical about 0V. Sketch the output waveform.
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Security models by giving striking analogies to the real world A classical case study: (With due acknowledgements to the security exponent who proposed this theory.) He has c
Assume the following 64-bit DES key (expressed in hexadecimal): FEFE FEFE FEFE FEFE (a) What is the term for such a key? (b) State the value of each of the 48-bit round keys
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