The typical firewall consists of two packet filters and a (an) (68) ．(68)

A．router

B．bridge

C．application

D．server

[单选题]A main bearing consists of two shells which are secured by means of studs and （）.A . tie rodsB . through boltsC . lead wiresD . bearing ca

[单选题]A stock index consists of two stocks:·Company A has 50 shares outstanding v

[试题] Personal firewall is a technology that helps __(66)__ intruders from accessing data on your PC via the Internet or another network, by keeping __(67)__ data from entering or exiting your system.H．ackers do not just target national security organizati

[单选题]A． ______ consists of the symbols, characters, and usage rules that permit people to communicate with computer.A．programming languageB．networkC．keyboardD．DisplayA．B．C．D．

[名词解释] typical survey

[单选题]There is free firewall software available that can run on minimal hardware and provide a good level of (74) to your network.(74) A．protectiveB．profectingC．protectionD．profection

[单选题]A firewall is a (71) system designed to (72) an organization′s network against threats.(71) A．operatingB．programmingC．securityD．data(72) A．preventB．protectC．examineD．exploit

[单选题]The firewall device is a（75）system for connecting a computer network to other computer network.（75）A．hardwareB．softwareC．securityD．I/O

[单选题] Firewall is a ___(74)___ mechanism used by organizations to protect their LANs fromInternet.(74)A. reliable B. stable C. peaceful D. security

[单选题]A firewall is a (68) system designed to (69) all organization,s network aga-inst threats.(68) A．operatingB．programmingC．securityD．service(69) A．preventB．protectC．developD．exploit