Explain why modern networks are more susceptible to attacks than mainframe computers of the past.
What will be an ideal response?
The primary reason why modern networks are more susceptible to attacks than old
mainframes is access. In the past, with a mainframe, only a select few had access to the
computer, usually through a hard-wired connection with a dumb terminal. To connect
to the mainframe, one had to be on the physical premises. In today’s modern networks,
we provide access to hundreds of thousands users. For example, a Web server may be
accessible to anyone in the world and from anywhere in the world. Maintaining the
security of such a system is diffi cult when it is so open to use and potential attack.
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a. Diagonal pliers b. Lineman pliers c. Long-nosed pliers d. Multipurpose tools
The crossover circuit in Fig. 14.108 is a lowpass filter that is connected to a woofer. Find the transfer function H(?) = V?(?)/Vi(?).
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High soot levels in the flue gas of oil-burning furnaces is an indication of which condition?
A. too much air B. too little air C. too high of a draft D. high stack temperature
What is the annual operating cost for a solar water heating system with an SEF (solar energy factor of 2.1? (12.03 = a constant for the average kWh/day of electricity used in electric water heaters and 12¢ = 2014 national average cost of electricity in kWh)
A) $250.91 B) $225.19 C) $278.73 D) $234.66