دانلود رایگان پاورپوینت فایروال و VPN (انگلیسی)

Categorized by Structure

Commercial-Grade
State-alone
Combination of hardware and software
Many of features of stand alone computer
Firmware based instructions
Increase reliability and performance
Minimize likelihood of their being compromised
Customized software operating system
Can be periodically upgraded
Requires direct physical connection for changes
Extensive authentication and authorization
Rules stored in non-volatile memory