---
title: "Bollard — AP Cybersecurity Definition & Exam Guide"
description: "A bollard is a short, sturdy post that blocks vehicles from ramming a building, a physical security control you'll see in Unit 2's defense-in-depth layers."
canonical: "https://fiveable.me/ap-cybersecurity/key-terms/bollard"
type: "key-term"
subject: "AP Cybersecurity"
unit: "Unit 2"
---

# Bollard — AP Cybersecurity Definition & Exam Guide

## Definition

A bollard is a short, sturdy vertical post installed outside a building to physically stop vehicles from crashing into or ramming a protected area, serving as a physical security control in AP Cybersecurity Unit 2.

## What It Is

A **bollard** is a short, strong post (often steel or concrete) planted in the ground to keep vehicles out of a space. You've walked past hundreds of them outside storefronts, government buildings, and data centers without thinking twice. Their cyber job is simple: stop a car or truck from being driven straight through a wall to reach the people, servers, or equipment inside.

In [AP Cybersecurity](/ap-cybersecurity "fv-autolink"), bollards live in **[Unit 2](/ap-cybersecurity/unit-2 "fv-autolink"): Securing Spaces**, under topic 2.2. They're a *physical security control*, meaning they protect the building and the hardware itself rather than the software running on it. That matters because of EK 2.2.C.1: physical access to a device lets an adversary bypass nearly every technical control you've built. Encryption and firewalls don't help much if someone can drive a truck into your server room. Bollards are one of the outermost layers that keep an attacker (or a runaway vehicle) from ever getting that close.

## Why It Matters

[Bollards](/ap-cybersecurity/unit-2/protecting-physical-spaces/study-guide/PhHFFwPlXGtEWL781jEc "fv-autolink") support learning objective AP Cybersecurity 2.2.B, which asks you to explain how [threats](/ap-cybersecurity/key-terms/threat "fv-autolink") exploit physical vulnerabilities to cause loss, damage, disruption, or destruction. A vehicle ramming a building is exactly that kind of threat, and a bollard is the control that mitigates it. They also connect to 2.2.C, where you assess and document physical risk. Recognizing that an unprotected, vehicle-accessible entrance is a vulnerability is the whole point. The bigger theme here is **defense in depth**: no single control is enough, so you stack physical barriers like bollards, fencing, and locked doors on top of your technical controls.

## Connections

### [Physical Perimeter (Unit 2)](/ap-cybersecurity/key-terms/physical-perimeter)

A bollard is one piece of a layered [physical perimeter](/ap-cybersecurity/key-terms/physical-perimeter "fv-autolink"). Think of the perimeter as a series of rings, and bollards are the outermost ring that stops vehicles before fencing, doors, and badge readers even come into play.

### [Fencing (Unit 2)](/ap-cybersecurity/key-terms/fencing)

[Fencing](/ap-cybersecurity/key-terms/fencing "fv-autolink") and bollards do the same job for different threats. Fencing keeps people from walking in, while bollards keep vehicles from driving in, so a strong perimeter usually uses both together.

### [Access Control Vestibule (Unit 2)](/ap-cybersecurity/key-terms/access-control-vestibule)

Both are physical controls, but they stop different attacks. A bollard blocks brute-force vehicle attacks from the outside, while an [access control vestibule](/ap-cybersecurity/key-terms/access-control-vestibule "fv-autolink") (a mantrap) stops human social-engineering attacks like piggybacking at the door.

## On the AP Exam

Expect bollards in multiple-choice questions that ask you to match a physical threat to the right control or to identify which control protects against a vehicle-based attack. A typical stem describes a scenario (a server room near a busy parking lot, say) and asks what control reduces the risk. On FRQs that ask you to assess and document physical risk under objective 2.2.C, naming bollards as a mitigation for a vehicle-ramming vulnerability is a clean, scorable point. The skill is matching the control to the specific threat, so don't list bollards as a fix for social engineering or theft of a laptop.

## bollard vs fencing

Both are outer-perimeter physical barriers, so they get mixed up. Fencing is designed to keep people out by walling off an area, while a bollard is specifically built to stop vehicles from being driven into a building. On the exam, match bollard to vehicle threats and fencing to pedestrian or intruder threats.

## Key Takeaways

- A bollard is a short, sturdy post that stops vehicles from ramming or driving into a protected building.
- It's a physical security control in Unit 2, topic 2.2, supporting objectives 2.2.B and 2.2.C.
- Bollards matter because physical access lets adversaries bypass technical controls like firewalls and encryption (EK 2.2.C.1).
- Match bollards to vehicle-based threats, not to social engineering or theft of small devices.
- Bollards work as part of defense in depth, layered with fencing, locked doors, and access control vestibules.

## FAQs

### What is a bollard in cybersecurity?

A bollard is a short, sturdy post installed outside a building to physically block vehicles from ramming into it. In AP Cybersecurity it's a physical security [control](/ap-cybersecurity/unit-2/cyber-foundations/study-guide/0oS8jJyX7iolYntwz5Eh "fv-autolink") covered in Unit 2's topic 2.2.

### Does a bollard stop hackers?

No, not directly. A bollard stops physical vehicle attacks, not network or software attacks. But it matters to cybersecurity because physical access to a device can let an attacker bypass technical controls (EK 2.2.C.1), so a bollard helps keep attackers away from the hardware in the first place.

### How is a bollard different from fencing?

Both are outer-perimeter barriers, but they stop different threats. Fencing keeps people from walking in, while a bollard keeps vehicles from driving in. A strong perimeter usually uses both.

### Is a bollard on the AP Cybersecurity exam?

It can appear as a physical security control in Unit 2 multiple-choice questions, usually in scenarios asking you to match a control to a physical threat like a vehicle ramming a building. The key skill is pairing it with the right threat.

### Why do bollards count as a cybersecurity control?

Because cybersecurity includes protecting the physical spaces and hardware that store data. A bollard supports objective 2.2.B by mitigating a physical threat (vehicle damage) that could cause loss, destruction, or disruption of computing assets.

## Related Study Guides

- [2.2 Physical Vulnerabilities and Attacks](/ap-cybersecurity/unit-2/physical-vulnerabilities-and-attacks/study-guide/ZcvQYEyowkyIYrjESpUp)

## Structured Data

```json
{"@context":"https://schema.org","@graph":[{"@type":"LearningResource","@id":"https://fiveable.me/ap-cybersecurity/key-terms/bollard#resource","name":"Bollard — AP Cybersecurity Definition & Exam Guide","url":"https://fiveable.me/ap-cybersecurity/key-terms/bollard","learningResourceType":"Concept explainer","educationalLevel":"AP® / High School","about":{"@id":"https://fiveable.me/ap-cybersecurity/key-terms/bollard#term"},"audience":{"@type":"EducationalAudience","educationalRole":"student"},"dateModified":"2026-06-15T18:59:31.165Z","isPartOf":{"@type":"Collection","name":"AP Cybersecurity Key Terms","url":"https://fiveable.me/ap-cybersecurity/key-terms"},"publisher":{"@type":"Organization","name":"Fiveable","url":"https://fiveable.me"}},{"@type":"DefinedTerm","@id":"https://fiveable.me/ap-cybersecurity/key-terms/bollard#term","name":"bollard","description":"A bollard is a short, sturdy vertical post installed outside a building to physically stop vehicles from crashing into or ramming a protected area, serving as a physical security control in AP Cybersecurity Unit 2.","url":"https://fiveable.me/ap-cybersecurity/key-terms/bollard","inDefinedTermSet":{"@type":"DefinedTermSet","name":"AP Cybersecurity Key Terms","url":"https://fiveable.me/ap-cybersecurity/key-terms"},"educationalAlignment":[{"@type":"AlignmentObject","alignmentType":"educationalSubject","educationalFramework":"AP® Course and Exam Description","targetName":"AP Cybersecurity Unit 2, Topic 2.2, LO 2.2.A"},{"@type":"AlignmentObject","alignmentType":"educationalSubject","educationalFramework":"AP® Course and Exam Description","targetName":"AP Cybersecurity Unit 2, Topic 2.2, LO 2.2.B"},{"@type":"AlignmentObject","alignmentType":"educationalSubject","educationalFramework":"AP® Course and Exam Description","targetName":"AP Cybersecurity Unit 2, Topic 2.2, LO 2.2.C"}]},{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What is a bollard in cybersecurity?","acceptedAnswer":{"@type":"Answer","text":"A bollard is a short, sturdy post installed outside a building to physically block vehicles from ramming into it. In AP Cybersecurity it's a physical security [control](/ap-cybersecurity/unit-2/cyber-foundations/study-guide/0oS8jJyX7iolYntwz5Eh \"fv-autolink\") covered in Unit 2's topic 2.2."}},{"@type":"Question","name":"Does a bollard stop hackers?","acceptedAnswer":{"@type":"Answer","text":"No, not directly. A bollard stops physical vehicle attacks, not network or software attacks. But it matters to cybersecurity because physical access to a device can let an attacker bypass technical controls (EK 2.2.C.1), so a bollard helps keep attackers away from the hardware in the first place."}},{"@type":"Question","name":"How is a bollard different from fencing?","acceptedAnswer":{"@type":"Answer","text":"Both are outer-perimeter barriers, but they stop different threats. Fencing keeps people from walking in, while a bollard keeps vehicles from driving in. A strong perimeter usually uses both."}},{"@type":"Question","name":"Is a bollard on the AP Cybersecurity exam?","acceptedAnswer":{"@type":"Answer","text":"It can appear as a physical security control in Unit 2 multiple-choice questions, usually in scenarios asking you to match a control to a physical threat like a vehicle ramming a building. The key skill is pairing it with the right threat."}},{"@type":"Question","name":"Why do bollards count as a cybersecurity control?","acceptedAnswer":{"@type":"Answer","text":"Because cybersecurity includes protecting the physical spaces and hardware that store data. A bollard supports objective 2.2.B by mitigating a physical threat (vehicle damage) that could cause loss, destruction, or disruption of computing assets."}}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"AP Cybersecurity","item":"https://fiveable.me/ap-cybersecurity"},{"@type":"ListItem","position":2,"name":"Key Terms","item":"https://fiveable.me/ap-cybersecurity/key-terms"},{"@type":"ListItem","position":3,"name":"Unit 2","item":"https://fiveable.me/ap-cybersecurity/unit-2"},{"@type":"ListItem","position":4,"name":"bollard"}]}]}
```