work（ ）,systems that effectively isolate an organization"s internal network structure from an （ ） network, such as the INTERNET is becoming increasingly popular. These firewall systems typically act as application-layer（请作答此空）between networks, usually offering controlled TELNET, FTP, and SMTP access. With the emergence of more sophisticated（ ）layer protocols designed to facilitate global information discovery , there exists a need to provide a general （ ）for these protocols to transparently and securely traverse a firewall.

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Software engineers apply the principles of software engineering to the design, development, ( ),testing, and evaluation of the software and systems that make computers or anything containing software work.

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work（ ）,systems that effectively isolate an organizations internal network structure from an （ ） network, such as the INTERNET is becoming increasingly popular. These firewall systems typically act as application-layer（ ）between networks, usually offering controlled TELNET, FTP, and SMTP access. With the emergence of more sophisticated（请作答此空）layer protocols designed to facilitate global information discovery , there exists a need to provide a general （ ）for these protocols to transparently and s

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On that day, he was late for work usual.

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There‘sa limited amount of work that you can do,_hard you work.(5.0)(5.0)( 5.0)

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The branch of linguistics that studies the systems and patterns of speech sounds in a language is called _____.

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