Routing tables, OSPF and BGP concepts
Read a routing table, predict which route a packet uses, and understand how OSPF and BGP choose paths well enough to troubleshoot them.
- Level
- Advanced
- Length
- About 55 minutes
- Contents
- 3 lessons · 1 video · final exam
- Status
- Published · updated 1 Oct 2026
Skills you'll practise
- Apply longest-prefix match to choose the route for a destination
- Explain administrative distance versus metric
- Calculate OSPF path cost and name common adjacency problems
- Explain how BGP prefers paths (local preference, AS path) and how prepending affects inbound traffic
Course outline
- 1.How routers choose paths: OSPF and BGP conceptsVideo · 2 min
- 2.How a router chooses a routeLesson · 20 min
- 3.OSPF and BGP in practiceLesson · 25 min
- 4.Default routes, floating statics and redistributionLesson · 20 min
- 5.Routing tables, OSPF and BGP concepts: knowledge checkKnowledge check · 20 questions
- 6.Final exam8 questions · passing it completes the course, so people who already know the material can test out
Sources it draws on
The lessons and questions are written from these references, so learners can go back to the original.
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