3.0 IP Connectivity

The heart of the CCNA. Accounting for 25% of the exam, this domain requires a deep, practical understanding of how routers build their forwarding tables and dynamically share paths using OSPFv2.

Domain Readiness

Complete all 5 sub-modules to unlock the Domain 3.0 assessment.

Overall Progress0%

Critical Path: OSPFv2 Mastery

Do not skim the OSPF sections. You must be able to configure OSPF from memory, calculate wildcard masks instantly, and understand how the DR/BDR election impacts network traffic. This is guaranteed to be heavily tested in the performance-based labs.

Study Modules

3.1 The Routing Table

Planned

Interpret the components of a routing table: routing protocol code, prefix, network mask, next hop, administrative distance, and metric.

Initialize Sequence

3.2 Static Routing

Planned

Configure IPv4 and IPv6 static routing, default routes (Gateway of Last Resort), network routes, host routes, and floating static routes.

Initialize Sequence

3.3 Single-Area OSPFv2 (Concepts)

Planned

Understand OSPF neighbor adjacencies, Point-to-Point vs. Broadcast network types, and the Designated Router (DR/BDR) election process.

Initialize Sequence

3.4 Single-Area OSPFv2 (Configuration)

Planned

Configure OSPF process IDs, manually assign Router IDs, advertise networks using wildcard masks, and manipulate interface cost.

Initialize Sequence

3.5 First Hop Redundancy (FHRP)

Planned

Understand the purpose of FHRPs like HSRP and VRRP to provide default gateway redundancy for end hosts.

Initialize Sequence