Learn how HTTP and HTTPS differ in encryption, authentication, data integrity, default ports, and security for IB Computer Science A2.1 exam questions.

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A2.1 Network fundamentals

What Does DHCP Do?

Learn what DHCP does, how the DORA process assigns network settings, why address leases matter, and what IB Computer Science exam answers should include.

A2.1 Network fundamentals

What Are the Layers of the TCP/IP Model (Application; Transport; Internet; Network Interface)? (HL)

Learn the four TCP/IP model layers, their functions, protocols, data units, addressing, and encapsulation for IB Computer Science HL exam preparation.

A2.2 Network architecture

What's the Difference Between a Star, Mesh, and Hybrid Network Topology?

Compare star, mesh, and hybrid network topologies for IB Computer Science, including structure, resilience, cost, scalability, and exam-response technique.

A2.2 Network architecture

What Do DNS, DHCP, File, Mail, Proxy, and Web Servers Do?

Learn the functions of DNS, DHCP, file, mail, proxy, and web servers for IB Computer Science HL network architecture exam questions.

A2.2 Network architecture

What Is Network Segmentation and Why Is It Used?

Learn how network segmentation divides a network into subnetworks to improve security, performance, management, and fault containment in IB Computer Science.

A2.2 Network architecture

What's the Difference Between Subnetting and a VLAN?

Learn how subnetting divides IP networks at Layer 3, while VLANs create logical Layer 2 broadcast domains, with clear IB examples and exam tips.

A2.3 Data transmissions

What's the Difference Between IPv4 and IPv6?

Compare IPv4 and IPv6 address length, notation, capacity, headers, fragmentation and implications for IB Computer Science data transmission exams.

A2.3 Data transmissions

What's the Difference Between a Public and Private IP Address?

Learn how public and private IP addresses differ in scope, routing, uniqueness, assignment, and NAT for IB Computer Science data transmission questions.

A2.3 Data transmissions

What's the Difference Between a Static and Dynamic IP Address?

Learn how static and dynamic IP addresses differ, how DHCP assigns them, their uses and advantages, and what IB Computer Science exam answers require.

A2.3 Data transmissions

What Does Network Address Translation (NAT) Do?

Learn how NAT maps private IPv4 addresses to public addresses, tracks connections in a table, and supports IB exam answers on data transmission.

A2.3 Data transmissions

What's the Difference Between Fiber-Optic, Twisted-Pair, and Wireless Data Transmission?

Learn how fiber optic, twisted pair, and wireless transmission differ in signal type, bandwidth, interference, security, cost, and mobility for IB exams.

A2.3 Data transmissions

What Is Packet Switching and How Does Data Get Reassembled at Its Destination?

Learn how packet switching divides data, routes packets across networks, detects errors, and reassembles them correctly for IB Computer Science exams.

A2.3 Data transmissions

What's the Difference Between Static Routing and Dynamic Routing? (HL)

Learn how static and dynamic routing differ in configuration, adaptation, overhead, scalability, and exam application for IB Computer Science HL.

A2.4 Network security

How Does a Firewall Protect a Network?

Learn how a firewall protects a network by filtering traffic, applying security rules, and blocking unauthorized access in IB Computer Science exam answers.

A2.4 Network security

What Are the Strengths and Limitations of Firewalls?

Learn how firewalls filter network traffic, their key strengths and limitations, and how to evaluate them in IB Computer Science A2.4 exam answers.

A2.4 Network security

What's the Difference Between Phishing, Malware, and a Man-in-the-Middle Attack? (HL)

Compare phishing, malware, and man-in-the-middle attacks for IB Computer Science HL, with mechanisms, examples, prevention, and exam distinctions.

A2.4 Network security

What Is SQL Injection and Cross-Site Scripting (XSS)? (HL)

Learn how SQL injection and cross-site scripting exploit unvalidated input, their effects, and the controls required in IB Computer Science exams.

A2.4 Network security

What Is a Zero-Day Exploit? (HL)

Understand zero-day exploits, how they target unpatched vulnerabilities, why they are dangerous, and how to explain mitigations in IB Computer Science HL.

A2.4 Network security

What Countermeasures Protect Against Network Attacks (MFA; IDS; IPS; SSL/TLS)? (HL)

Learn how MFA, IDS, IPS, and SSL/TLS counter network attacks, including their roles, limitations, and key distinctions required for IB Computer Science HL.

A2.4 Network security

What's the Difference Between Symmetric and Asymmetric Encryption?

Learn how symmetric and asymmetric encryption differ in keys, speed, security, and uses for IB Computer Science A2.4 network security exams with examples.

A2.4 Network security

How Do Digital Certificates Establish a Secure Connection?

Learn how digital certificates authenticate servers, validate public keys through certificate authorities, and support secure TLS connections for IB exams.

A2.4 Network security

What's the Role of Public and Private Keys in Encryption?

Learn how public and private keys enable asymmetric encryption, decryption, digital signatures and secure communication for IB Computer Science exams.

A3.1 Database fundamentals

What Is a Relational Database?

Learn how relational databases organize data into linked tables using primary and foreign keys, with an exam-focused IB Computer Science example.

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