# Cambridge International A Level Computer Science (9618): Section 14: Communication & Internet Tech

> Cellular network architectures, satellite communication, the 4-layer TCP/IP protocol suite, circuit switching vs packet switching, and advanced network security (IPSec, VPN tunnels, SSL/TLS handshake).

- **Track:** [Cambridge International A Level Computer Science (9618)](https://csmasters.dev/tracks/a-level-9618.md) (CAMBRIDGE A LEVEL 9618)
- **Module:** Section 14: Communication & Internet Tech
- **Total Lessons:** 4
- **URL:** https://csmasters.dev/tracks/a-level-9618/course_modules/14-communication-and-internet-technologies

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## Module Lessons

### Lesson 1: [14.1 Cellular Networks & Satellite Communication](https://csmasters.dev/learn/a-level-9618/cellular-and-satellite-networks.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Open Theory (All-Access Practice)
- **HTML Link:** https://csmasters.dev/learn/a-level-9618/cellular-and-satellite-networks

### Lesson 2: [14.2 The TCP/IP 4-Layer Protocol Suite](https://csmasters.dev/learn/a-level-9618/tcp-ip-protocol-suite.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Open Theory (All-Access Practice)
- **HTML Link:** https://csmasters.dev/learn/a-level-9618/tcp-ip-protocol-suite

### Lesson 3: [14.3 Circuit Switching vs Packet Switching](https://csmasters.dev/learn/a-level-9618/circuit-vs-packet-switching.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Open Theory (All-Access Practice)
- **HTML Link:** https://csmasters.dev/learn/a-level-9618/circuit-vs-packet-switching

### Lesson 4: [14.4 Network Security: IPSec, VPNs & SSL/TLS Handshake](https://csmasters.dev/learn/a-level-9618/network-security-ipsec-vpn.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Open Theory (All-Access Practice)
- **HTML Link:** https://csmasters.dev/learn/a-level-9618/network-security-ipsec-vpn