Static routing is foundational, but OSPF is the star of the CCNA.

: Configuring VLANs, Inter-switch connectivity (802.1Q Trunks), and Layer 2 discovery protocols like LLDP and CDP.

Standard and Extended Access Control Lists (ACLs). Create numbered and named ACLs to block specific host traffic while permitting web traffic (HTTP/HTTPS). Apply them to the correct interfaces using the ip access-group command.

Advertise networks within Area 0 using network commands and wildcard masks. Verify neighbor adjacencies using show ip ospf neighbor . Module 4: IP Services and Security Fundamentals

R2> enable R2# configure terminal R2(config)# interface GigabitEthernet0/0 R2(config-if)# ip address 10.1.1.2 255.255.255.252 R2(config-if)# no shutdown R2(config-if)# exit Use code with caution. Step 3: Enable OSPF Routing on R1