单项选择题

The firewall device is a（）system for connecting a computer network to other computer network．

A．hardware
B．software
C．security
D．I/O

<上一题 目录 下一题>
热门 试题

单项选择题
The two goals of an operation system are（）and efficiency.

A．convenience
B．quick
C．optimize
D．standardize
单项选择题
Network software consists of（），or rules by which processes can communicate．

A．protocols
B．programs
C．devices
D．computers
相关试题