Your router receives two routes to the same prefix. Route A has a local preference of 150 and a MED of 100. Route B has a local preference of 120 and a MED of 50. Which route will be preferred in BGP best-path selection?

Route A, because it has a higher MED, which is preferred.

Route A, because local preference is compared before MED.

Route B, because MED is compared before local preference.

Route B, because it has a lower MED, which is preferred.

You are configuring route aggregation on a Junos router. You create an aggregate route for 192.168.0.0/16 from more specific routes. You want to ensure that the aggregate route is not advertised if any of the contributing routes are missing, and you want to include the AS number of the router that created the aggregate in the route. Which attributes are relevant for this scenario?

AS path and next hop attributes

Atomic aggregate and aggregator attributes

Originator ID and cluster list attributes

Community and local preference attributes

Juniper NetworksCertified Professional, Enterprise Routing and Switching (JNCIP-ENT)

Domain 2Objective 3

BGP Attributes: Concept and Operation JN0-650 Practice Questions (Page 5)

Part of the BGP domain, which makes up ~22% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~8–13 in this domain), expect 1–1 from this objective — we provide 26 practice questions to prepare you well beyond it. (estimate)

26questions here

6free pages

10concepts

Questions 21–25

21application · medium
Your router receives two routes to the same prefix. Route A has a local preference of 150 and a MED of 100. Route B has a local preference of 120 and a MED of 50. Which route will be preferred in BGP best-path selection?
Select an answer first
22application · medium
You are configuring route aggregation on a Junos router. You create an aggregate route for 192.168.0.0/16 from more specific routes. You want to ensure that the aggregate route is not advertised if any of the contributing routes are missing, and you want to include the AS number of the router that created the aggregate in the route. Which attributes are relevant for this scenario?
Select an answer first
23foundation · easy
When comparing two BGP routes for the same prefix, which attribute is evaluated after the AS path length?
Select an answer first
24expert · hard
Your AS 65001 is a service provider with multiple customers. You want to tag routes from Customer A with a community that prevents them from being advertised to Customer B, but you still want to advertise them to other customers. Which well-known community should you use?
Select an answer first
25foundation · easy
Which well-known community value prevents a route from being advertised to any eBGP peer?
Select an answer first

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BGP Attributes: Concept and Operation JN0-650 Practice Questions (Page 5)

Questions 21–25

Your router receives two routes to the same prefix. Route A has a local preference of 150 and a MED of 100. Route B has a local preference of 120 and a MED of 50. Which route will be preferred in BGP best-path selection?

When comparing two BGP routes for the same prefix, which attribute is evaluated after the AS path length?

Your AS 65001 is a service provider with multiple customers. You want to tag routes from Customer A with a community that prevents them from being advertised to Customer B, but you still want to advertise them to other customers. Which well-known community should you use?

Which well-known community value prevents a route from being advertised to any eBGP peer?

Keep studying — BGP