A2.1
Network fundamentals
Network types, Digital infrastructure, Network devices, Transport and application protocols, TCP/IP layers
A2.2
Network architecture
Star, mesh and hybrid topologies, Server functions, Client-server and peer-to-peer models, Network segmentation
A2.3
Data transmissions
IP addressing, Transmission media, Packet switching, Static and dynamic routing
A2.4
Network security
Firewalls, Network vulnerabilities, Countermeasures, Encryption, Digital certificates
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