We can use a firewall to protect our home network and family from _21_ websites and potential hackers. Firewall plays an important _22_ in controlling, _23_ the connections between the _24_ network of a company and Internet, and safeguarding the security of a certain company.The firewall used in Internet is not a real wall _25_ a component system of the computer hardware and software, _26_ isolates a private network from a public network. The firewall is used as the protection system of a certain network to _27_ unauthorized users from accessing that network. An enterprise_28_ an intranet(内部网络) that allows its workers to have_29_ to the wider Internet installs a firewall to prevent outsiders from accessing its own private data resources and to control _30_ outside resources its own users have access to.

We can use a firewall to protect our home network and family from _21_ websites and potential hackers. Firewall plays an important _22_ in controlling, _23_ the connections between the _24_ network of a company and Internet, and safeguarding the security of a certain company.The firewall used in Internet is not a real wall _25_ a component system of the computer hardware and software, _26_ isolates a private network from a public network. The firewall is used as the protection system of a certain network to _27_ unauthorized users from accessing that network. An enterprise_28_ an intranet(内部网络) that allows its workers to have_29_ to the wider Internet installs a firewall to prevent outsiders from accessing its own private data resources and to control _30_ outside resources its own users have access to.

担保，保证v.g_ _ _ _ _ _ _ _

投资者，出资人n.i_ _ _ _ _ _ _

安装v.i_ _ _ _ _ _

最小的，极少的adj.m_ _ _ _ _ _

规模，比例（尺）n.s_ _ _ _

(核对用的)清单，列表，检查单n.c_ _ _ _ _ _ _ _

出价，投标v.&n.b_ _

在国外，在海外 adv.a_ _ _ _ _