Question 83 of 1,000
hardMultiple ChoiceObjective-mapped

SSCP Practice Question: Detects that an attacker is performing a MAC…

This SSCP practice question tests your understanding of sscp exam topics. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

An organization detects that an attacker is performing a MAC flooding attack on a switch. What is the primary goal of this attack?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

  • Clue: "primary"

    Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

To force the switch to act like a hub and allow packet sniffing

MAC flooding attacks exploit the limited size of a switch's Content Addressable Memory (CAM) table. By sending thousands of fake source MAC addresses, the attacker fills the CAM table, causing the switch to fail open and flood all incoming frames out all ports, effectively behaving like a hub. This allows the attacker to sniff traffic that would normally be isolated to specific switch ports.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • To change the MAC address of the switch

    Why it's wrong here

    The attack does not change switch MAC addresses.

  • To cause a denial of service on the network

    Why it's wrong here

    While flooding may cause performance issues, the primary goal is traffic interception.

  • To force the switch to act like a hub and allow packet sniffing

    Why this is correct

    Filling the CAM table causes the switch to flood frames out all ports.

    Clue confirmation

    The clue word "primary" in the question point toward this answer.

    Related concept

    Read the scenario before looking for a memorised answer.

  • To bypass 802.1X authentication

    Why it's wrong here

    MAC flooding does not bypass authentication mechanisms.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse the primary goal of MAC flooding (sniffing traffic) with a denial of service, but Cisco tests that the attacker's intent is to bypass port-level isolation to eavesdrop, not simply to crash the switch.

Detailed technical explanation

How to think about this question

Under the hood, a switch's CAM table typically holds tens of thousands of entries (e.g., 8,000 to 32,000). Once flooded, the switch enters a 'fail-open' state where it broadcasts all unknown unicast frames, enabling an attacker connected to any port to capture traffic using a packet sniffer like Wireshark. In real-world scenarios, this attack is often mitigated by port security features that limit the number of MAC addresses per port (e.g., 'switchport port-security maximum 1') or by using dynamic ARP inspection (DAI) to validate MAC-to-IP bindings.

KKey Concepts to Remember

  • Read the scenario before looking for a memorised answer.
  • Find the constraint that changes the correct option.
  • Eliminate answers that are true in general but not in this case.

TExam Day Tips

  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.

Quick reference

Access Control Model Comparison

ModelAcronymWho Controls Access?Best For
Discretionary Access ControlDACResource ownerSmall teams, file shares
Mandatory Access ControlMACSystem / security labelsClassified govt / military
Role-Based Access ControlRBACAdministrator (via roles)Enterprise environments
Attribute-Based Access ControlABACPolicy engine (user + resource attributes)Fine-grained, dynamic policies
Rule-Based Access ControlRuBACSystem rules / ACLsFirewall rules, network ACLs

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FAQ

Questions learners often ask

What does this SSCP question test?

Read the scenario before looking for a memorised answer.

What is the correct answer to this question?

The correct answer is: To force the switch to act like a hub and allow packet sniffing — MAC flooding attacks exploit the limited size of a switch's Content Addressable Memory (CAM) table. By sending thousands of fake source MAC addresses, the attacker fills the CAM table, causing the switch to fail open and flood all incoming frames out all ports, effectively behaving like a hub. This allows the attacker to sniff traffic that would normally be isolated to specific switch ports.

What should I do if I get this SSCP question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 11, 2026

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This SSCP practice question is part of Courseiva's free ISC2 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SSCP exam.