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CS Professional · Artificial Intelligence, Data Analytics and Cyber Security - Laws and Practice · Network Basics and Security

A company wants a security control that sits between its internal network and the internet and permits or blocks traffic based on a predefined set of rules covering IP addresses, ports and protocols. Which tool best fits this description?

The tool is a firewall. It sits at the boundary between an internal network and the internet and allows or blocks traffic according to predefined rules on IP addresses, ports and protocols. Switches, caches and certificates do not perform this perimeter rule-based filtering function.

  1. AFirewallCorrect
  2. BProxy cache server
  3. CNetwork switch
  4. DDigital certificate

Explanation

A firewall enforces rules on traffic passing between networks, filtering by address, port and protocol. A switch only forwards frames within a LAN and does not apply perimeter policy. A proxy cache is mainly meant to speed up access, and a digital certificate authenticates identity.

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