Back to Communication and Network Security
4.1 ~55 min
Apply secure design principles in network architectures
Overview
Know the OSI 7 layers and TCP/IP mapping cold, where each secure protocol operates (IPSec, SSH, TLS), and modern segmentation strategies up to micro-segmentation and zero trust.
Key topics to master
- OSI and TCP/IP models
- IPv4 / IPv6 (unicast, broadcast, multicast, anycast)
- Secure protocols: IPSec, SSH, SSL/TLS
- Multilayer & converged protocols (iSCSI, VoIP, CXL)
- Segmentation: physical, logical (VLAN/VPN), micro-segmentation
- Wireless (Wi-Fi, Bluetooth, Zigbee, satellite); cellular 4G/5G
- SDN / SD-WAN / NFV; CDN; VPC