The use of network（ ）,systems that effectively isolate an organization&39;s 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（ ）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.

时间：2022-01-03 19:59 关键词：