Domain 4: Communication and Network Security

Practice questions covering network architectures, secure network components, protocols, and communication security.

Question 1 of 10

Easy

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Which network security device operates at OSI Layer 3 (Network Layer) and makes decisions based on IP addresses?

Proxy server

Network firewall

Web application firewall

Intrusion Prevention System

Quick Tips: Communication and Network Security

OSI Model: Understand which network devices and protocols operate at each layer of the OSI model.

Network Security Devices: Know the differences between firewalls, IDS/IPS, proxies, and how they provide different security functions.

Secure Protocols: Memorize common secure protocols (HTTPS, SSH, SFTP) and their insecure counterparts (HTTP, Telnet, FTP).

Wireless Security: Compare the security features of different wireless security protocols (WEP, WPA, WPA2, WPA3).