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JN0-102 · Question #238

Which statement is true about a routing table?

The correct answer is D. It contains all accepted routes to all destinations.. A routing table acts as a comprehensive repository that stores all known and accepted routes to various network destinations.

Routing Fundamentals

Question

Which statement is true about a routing table?

Options

  • AIt contains routes learned dynamically only.
  • BIt finds the best path to each destination by using a modified shortest-path-first calculation.
  • CIt contains only active BGP routes.
  • DIt contains all accepted routes to all destinations.

How the community answered

(32 responses)
  • A
    3% (1)
  • B
    6% (2)
  • D
    91% (29)

Why each option

A routing table acts as a comprehensive repository that stores all known and accepted routes to various network destinations.

AIt contains routes learned dynamically only.

Routing tables contain routes from all sources, including static, direct, and aggregate routes, not only dynamically learned routes.

BIt finds the best path to each destination by using a modified shortest-path-first calculation.

While link-state protocols like OSPF use SPF, the routing table itself stores paths and performs best path selection based on metrics and administrative distance, rather than performing the shortest-path-first calculation directly.

CIt contains only active BGP routes.

The routing table contains all types of routes (direct, static, OSPF, ISIS, BGP, etc.), not exclusively active BGP routes.

DIt contains all accepted routes to all destinations.Correct

The routing table (Routing Information Base - RIB) on a router collects and stores all routes that have been learned or configured, including direct connections, static routes, and routes from dynamic routing protocols, regardless of whether they are currently active for forwarding.

Concept tested: Junos routing table content

Source: https://www.juniper.net/documentation/us/en/software/junos/routing-basics/topics/topic-map/routing-tables.html

Topics

#routing table#route selection#accepted routes

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