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Asked By: Anonymous |

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Firewalls can't protect very well against things like viruses or malicious software (malware). There are too many ways of encoding binary files for transfer over networks, and too many different architectures and viruses to try to search for them all. In other words, a firewall cannot replace security-consciousness on the part of your users. In general, a firewall cannot protect against a data-driven attack--attacks in which something is mailed or copied to an internal host where it is then executed.

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Properly configured firewalls can limit the propagation of worms - a form of malware. Typically, firewalls are edge or parameter devices (separates network zones) and most viruses and malware targets end points (user workstations and servers).

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Tuesday, November 06, 2007

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software, data, encoding, security, transfer, computer, firewall, viruses, malware, binary files, networks, security-consciousness, internal host

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What computer or technical skills make you uniquely qualified for this position

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Asked By: lillzrd |

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Be the first one to answer the question Click here to answer

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Tuesday, November 25, 2008

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What is silly window syndrome?

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Asked By: Anonymous |

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Silly window syndrome is a problem in computer networking caused by poorly-implemented TCP flow control. If a server with this problem is unable to process all incoming data, it requests that its clients reduce the amount of data they send at a time (the "window" setting on a TCP packet). If the server continues to be unable to process all incoming data, the window becomes smaller and smaller, sometimes to the point that the data transmitted is smaller than the packet header, making data transmission extremely inefficient. The name of this problem is due to the window size shrinking to a "silly" value.

Since there is a certain amount of overheadassociated with processing each packet, the increased number of packets means increased overhead to process a decreasing amount of data. The end result is thrashing.

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Monday, April 28, 2008

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networking

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Network Administrator