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Intra-area route

As explained in Acing the CCNA Exam: Volume 1 Fundamentals and Protocols

An intra-area route reaches a destination within an OSPF area to which the router is connected.

An intra-area route reaches a destination inside an OSPF area to which the router is connected. For an internal router in area 1, destinations within area 1 use intra-area routes. section 18.1.2

Distinguish intra-area routes from other OSPF route categories:

  • Inter-area routes reach destinations in an area the router does not connect to. section 18.1.2
  • External routes reach destinations outside the OSPF autonomous system and are advertised by an ASBR. section 18.1.2
  • The CCNA exam expects recognition of intra-area, inter-area, and external route types, even when focusing on single-area OSPF. section 18.1.2

Area 1 destination

A router with all OSPF-enabled interfaces in area 1 learns a route to another destination within area 1. That route is intra-area; a destination in area 2 would be inter-area. section 18.1.2

How Acing the CCNA Exam: Volume 1 Fundamentals and Protocols covers it

How deep it goes
Defines same-area reachability and contrasts it with inter-area and external routes, without detailing route calculation.
Examples
Uses an internal router in area 1 and compares destinations in area 1 with destinations in area 2.
What it assumes
Assumes basic OSPF area and router-type terminology while defining route categories through simple area comparisons.
What you can do after
Evaluate OSPF route categories by comparing a destination’s area with the router’s connected areas.
How it connects
Connects OSPF areas with internal routers, area border routers, inter-area routes, external routes, and autonomous system boundary routers.
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Related concepts

This explainer was generated by Manning's knowledge graph from the text of Acing the CCNA Exam: Volume 1 Fundamentals and Protocols. The section links point to the parts of the book it draws on.