ds ch 7, ch 8 T
A Trojan horse is a software program that appears to be benign but then does something other than expected.
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Biometric authentication is the use of physical characteristics such as retinal images to provide identification.
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Coaxial cable is similar to that used for cable television and consists of thickly insulated copper wire.
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Computer worms spread much more rapidly than computer viruses.
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Computers using cable modems to connect to the Internet are more open to penetration than those connecting via dial-up.
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Fiber-optic cable is more expensive and harder to install than wire media.
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In a client/server network, a network server provides every connected client with an address so it can be found by others on the network.
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In a large company today, you will often find an infrastructure that includes hundreds of small LANs linked to each other as well as to corporate-wide networks.
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Mobile devices are not targeted as extensively by malware as traditional computer
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Mobile search makes up 20% of all Internet searches.
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NAT conceals the IP addresses of the organization's internal host computers to deter sniffer programs.
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One form of spoofing involves forging the return address on an e-mail so that the e-mail message appears to come from someone other than the sender.
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Public key encryption uses two keys.
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SSL is a protocol used to establish a secure connection between two computers.
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Sniffers enable hackers to steal proprietary information from anywhere on a network, including e-mail messages, company files, and confidential reports.
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Telephone networks are fundamentally different from computer networks.
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Two computers using TCP/IP can communicate even if they are based on different hardware and software platforms.
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Unauthorized access is a security challenge that is most likely to occur in a network at the point of client computers.
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Viruses can be spread through e-mail.
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VoIP technology delivers voice information in digital form using packet switching.
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Web 3.0 is an effort to add a layer of meaning to the existing Web in order to reduce the amount of human involvement in searching for and processing Web information.
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Wikis allow visitors to change or add to the original posted material.
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Wireless networks are vulnerable to penetration because radio frequency bands are easy to scan.
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Zero defects cannot be achieved in larger software programs because fully testing programs that contain thousands of choices and millions of paths would require thousands of years.
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