Network engineer, male, 35yo, formal wear, glasses, short hair, beard, standing, in front of a large whiteboard, markers in hand, explaining complex network design, blueprints, diagrams, routers, switches, servers, firewalls, cables, wires, data centers, cloud computing, virtualization, network architecture, layered structure, OSI model, TCP/IP protocol, internet infrastructure, cityscape, skyscrapers, metropolitan area, daytime, natural light, realistic, cinematic composition, shallow depth of field.