350-501 Networking Practice Question
In IS-IS, which type of router is responsible for exchanging routing information between different areas?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
L2 router
L2 routers handle inter-area routing in IS-IS, while L1 routers handle intra-area routing. L1/L2 routers act as both.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
L1/L2 router
Why it's wrong here
L1/L2 routers serve both functions but are not solely responsible for inter-area routing.
- ✗
L1 router
Why it's wrong here
L1 routers only route within an area.
- ✗
Attached router
Why it's wrong here
Attached router is an L1/L2 router that advertises default route, but not the primary inter-area router.
- ✓
L2 router
Why this is correct
L2 routers exchange information between areas.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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