What is the primary purpose of using BGP communities?

To tag routes with information that can be used to influence routing policies.

To replace the AS path attribute for loop prevention.

To reduce the number of BGP updates by aggregating routes.

To encrypt BGP updates between peers.

A provider wants to signal to its upstream that routes tagged with community 65000:100 should be advertised to a specific customer, while routes tagged with 65000:200 should not be advertised to that customer. What is the most appropriate way to implement this using BGP communities?

Use a regular expression to match the AS path and apply the community

Configure an export policy that matches community 65000:100 and rejects community 65000:200

Configure an import policy that sets community 65000:100 on all routes

Configure a routing policy that changes the local preference based on the community

A router receives a BGP route with a next-hop that is not directly connected. The router has no route to the next-hop in its routing table. What happens to the BGP route?

The route is not installed in the routing table

The route is installed with a next-hop of 0.0.0.0

The route is installed but marked as inactive

The route is installed and the next-hop is ignored

Juniper NetworksCertified Professional, Service Provider Routing and Switching (JNCIP-SP)

Domain 3Objective 1

BGP Fundamentals and Path Selection JN0-664 Practice Questions (Page 1)

Part of the BGP domain, which makes up ~6% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~2–4 in this domain), expect 1–1 from this objective — we provide 13 practice questions to prepare you well beyond it. (estimate)

13questions here

3free pages

5concepts

Questions 1–5

1foundation · easy
What is the primary purpose of using BGP communities?
Select an answer first
2application · medium
A service provider wants to prefer routes learned from a specific peer over all other routes to the same prefix. Which BGP attribute should be set to achieve this?
Select an answer first
3foundation · easy
Which BGP community is predefined and indicates that a route should not be advertised outside the local AS?
Select an answer first
4application · medium
A provider wants to signal to its upstream that routes tagged with community 65000:100 should be advertised to a specific customer, while routes tagged with 65000:200 should not be advertised to that customer. What is the most appropriate way to implement this using BGP communities?
Select an answer first
5application · medium
A router receives a BGP route with a next-hop that is not directly connected. The router has no route to the next-hop in its routing table. What happens to the BGP route?
Select an answer first

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BGP Fundamentals and Path Selection JN0-664 Practice Questions (Page 1)

Questions 1–5

What is the primary purpose of using BGP communities?

A service provider wants to prefer routes learned from a specific peer over all other routes to the same prefix. Which BGP attribute should be set to achieve this?

Which BGP community is predefined and indicates that a route should not be advertised outside the local AS?

A provider wants to signal to its upstream that routes tagged with community 65000:100 should be advertised to a specific customer, while routes tagged with 65000:200 should not be advertised to that customer. What is the most appropriate way to implement this using BGP communities?

A router receives a BGP route with a next-hop that is not directly connected. The router has no route to the next-hop in its routing table. What happens to the BGP route?

Keep studying — BGP