IB Computer Science 3.1.4 VPN Technologies Notes

VPN Technologies

Understanding VPNs

Definition

Virtual Private Network (VPN)

A technology that creates a secure and encrypted connection over a less secure network, such as the Internet and allows remote users to access a private network as if they were directly connected to it.

VPN allows users to access a private network remotely as if they were physically present.

Key Features of VPN Technologies

Encryption

Ensures that data is unreadable to unauthorised users.
Common algorithms include AES (Advanced Encryption Standard) and RSA.

Authentication

Verifies the identity of users and devices.
Methods include digital certificates, passwords, and two-factor authentication.

Tunneling

Encapsulates data packets within another packet, creating a "tunnel" through the Internet.
Protocols like PPTP (Point-to-Point Tunnelling Protocol) and L2TP (Layer 2 Tunnelling Protocol) are commonly used.

Analogy

Think of a VPN tunnel as a secure pipeline through which your data travels.
Even though the pipeline runs through a public space (the Internet), the data inside remains protected from prying eyes.

Example

VPN can be used in:

Corporate Environments: VPNs are widely used to connect remote employees to company intranets securely.
Education: Students and faculty can access university resources from off-campus locations.
Healthcare: VPNs enable secure access to patient records and telemedicine services.

Core Technologies of VPNs

Internet Access

A stable Internet connection is essential for establishing a VPN.

VPN Software

Client Software: Installed on user devices to connect to the VPN.

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Note

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Tip

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Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

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Note

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Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

IB Computer Science 3.1.4 VPN Technologies Notes

VPN Technologies

Understanding VPNs

Key Features of VPN Technologies

Core Technologies of VPNs

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Excepteur sint occaecat cupidatat non proident

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VPN Technologies

Understanding VPNs

Key Features of VPN Technologies

Core Technologies of VPNs

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1. System fundamentals2 subtopics

2. Computer organization1 subtopic

3. Networks1 subtopic

4. Computational thinking, problem-solving and programming3 subtopics

5. Abstract data structures (HL)1 subtopic

6. Resource management (HL)1 subtopic

7. Control (HL)1 subtopic

A. Databases4 subtopics

B. Modelling and simulation4 subtopics

C. Web science6 subtopics

D. Object-oriented programming (OOP)4 subtopics

IB Computer Science 3.1.4 VPN Technologies Notes

1. System fundamentals2 subtopics

2. Computer organization1 subtopic

3. Networks1 subtopic

4. Computational thinking, problem-solving and programming3 subtopics

5. Abstract data structures (HL)1 subtopic

6. Resource management (HL)1 subtopic

7. Control (HL)1 subtopic

A. Databases4 subtopics

B. Modelling and simulation4 subtopics

C. Web science6 subtopics

D. Object-oriented programming (OOP)4 subtopics

VPN Technologies

Understanding VPNs

Key Features of VPN Technologies

Core Technologies of VPNs

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

VPN Technologies

Understanding VPNs

Key Features of VPN Technologies

Core Technologies of VPNs

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account