2022下半年网络工程师上午真题答案（八）-编程学习网

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　　71-75、 Network frewalls are security devices used to stop or mitigate (71) access to private networks connected to the Internet, especially intranets. The only trafle alowed on thev network is defined via firewall (72)-any other taff attempting to access the network is blocked. Network frewalls sit at the (73) line of a network, acting as a communications

　　liaison between intemal and gxtemal devics, When properly configured, a firewall alws users to access any of the resources they need while simultaneously keeping out unwanted accesses. In addition to limiting access to a protected computer and network, a firewall can (74) all taffit coming into or leaving a network, and manage remote access to a private network through secure authentication grtificates and logins. (75) firewalls examine every packet that passes through the network and then acep or deny it as defined by rules set by the user.

　　(71) A unauthorized

　　B.authorized

　　C.normal

　　D. frequent

　　(72) A ports

　　B.policies

　　C.commandse

　　D. statuse

　　(73) A.front

　　B.back

　　C.second

　　D. last