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Juniper

JN0-102 · Question #108

What are two default routing policies on Junos devices? (Choose two.)

The correct answer is A. The BGP import policy accepts all BGP routes. C. The OSPF import policy accepts all OSPF routes. By default, Junos devices accept all BGP routes received from peers and all OSPF routes received from neighbors into their respective routing tables.

Routing Policy and Firewall Filters

Question

What are two default routing policies on Junos devices? (Choose two.)

Options

  • AThe BGP import policy accepts all BGP routes.
  • BThe BGP export policy rejects all active BGP routes.
  • CThe OSPF import policy accepts all OSPF routes.
  • DThe OSPF export policy accepts all active OSPF routes.

How the community answered

(62 responses)
  • A
    94% (58)
  • B
    5% (3)
  • D
    2% (1)

Why each option

By default, Junos devices accept all BGP routes received from peers and all OSPF routes received from neighbors into their respective routing tables.

AThe BGP import policy accepts all BGP routes.Correct

By default, BGP on Junos OS implicitly accepts all BGP routes received from peers into the routing table, allowing full route propagation without explicit import policies.

BThe BGP export policy rejects all active BGP routes.

While the BGP export policy defaults to rejecting all active routes, preventing their advertisement, this describes a restrictive export behavior and is not selected as one of the two default import policies.

CThe OSPF import policy accepts all OSPF routes.Correct

OSPF on Junos OS also defaults to accepting all OSPF routes learned from neighbors into the routing table, ensuring standard OSPF operation without an explicit import filter.

DThe OSPF export policy accepts all active OSPF routes.

While OSPF by default accepts and exports all active OSPF routes to neighbors, this describes a permissive export behavior and is not selected as one of the two default import policies in this context.

Concept tested: Junos default BGP and OSPF routing policies

Source: https://www.juniper.net/documentation/us/en/software/junos/routing-policy/topics/concept/policy-defaults-and-implications.html

Topics

#default routing policy#BGP#OSPF#route import/export

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