Cisco Certified Network Associate (CCNA) Practice Exam

What defines a Port Redirection attack?

1. Using a compromised internal host to attack outside hosts

2. Illegitimate access to inside hosts via a DMZ host

3. Bypassing the firewall using secure protocols

4. Redirecting traffic through unauthorized network interfaces

The correct answer is: Illegitimate access to inside hosts via a DMZ host

A Port Redirection attack involves redirecting traffic through unauthorized network interfaces to compromise or manipulate the flow of data within a network. This can occur when attackers exploit vulnerabilities to reroute legitimate traffic, potentially gaining access to sensitive information or resources by using unauthorized pathways. In this context, the correct answer captures the essence of how attackers can control traffic flows inappropriately. The focus is on the unauthorized nature of accessing internal resources, which is a key characteristic of a port redirection scenario. Redirecting traffic improperly allows attackers to intercept or alter communications without detection. The other options highlight different attack methodologies but do not align with the specific mechanics of a Port Redirection attack. For instance, attacking externally from a compromised host or exploiting a DMZ host focuses on different aspects of network security risks and vulnerabilities. Bypassing a firewall using secure protocols relates more to tunneling and encryption issues rather than redirection of traffic itself, making them distinct from the defined concept of port redirection.