1.1 Explain the role and function of network components

1.1.a Routers
1.1.b L2 and L3 switches
1.1.c Next-generation firewalls and IPS
1.1.d Access points
1.1.e Controllers (Cisco DNA Center and WLC)
1.1.f Endpoints
1.1.g Servers

1.2 Describe characteristics of network topology architectures
1.2.a 2 tier
1.2.b 3 tier
1.2.c Spine-leaf
1.2.d WAN
1.2.e Small office/home office (SOHO)
1.2.f On-premises and cloud

1.3 Compare physical interface and cabling types
1.3.a Single-mode fiber, multimode fiber, copper
1.3.b Connections (Ethernet shared media and point-to-point)
1.3.c Concepts of PoE

1.4 Identify interface and cable issues (collisions, errors, mismatch duplex, and/or speed)

1.5 Compare TCP to UDP

1.6 Configure and verify IPv4 addressing and subnetting

1.7 Describe the need for private IPv4 addressing

1.8 Configure and verify IPv6 addressing and prefix

1.9 Compare IPv6 address types
1.9.a Global unicast
1.9.b Unique local
1.9.c Link local
1.9.d Anycast
1.9.e Multicast
1.9.f Modified EUI 64

1.10 Verify IP parameters for Client OS (Windows, Mac OS, Linux)

1.11 Describe wireless principles
1.11.a Nonoverlapping Wi-Fi channels
1.11.b SSID
1.11.c RF
1.11.d Encryption

1.12 Explain virtualization fundamentals (virtual machines)

1.13 Describe switching concepts
1.13.a MAC learning and aging
1.13.b Frame switching
1.13.c Frame flooding
1.13.d MAC address table

https://learningnetwork.cisco.com/s/ccna-exam-topics