JUNOS Enterprise Routing

Chapter Review Questions

1. What BGP attribute guards against loops?

   1. MED

   2. Barring an IBGP speaker from resending IBGP updates

   3. Cluster ID

   4. AS path

2. What BGP attribute is most likely to influence egress from your AS?

   1. AS path

   2. Local preference

   3. MED

   4. Cluster length

   5. None of the above

3. What BGP attribute is mostly likely to influence a remote AS that you do not peer with?

   1. This is not possible given the local scope of BGP

   2. AS path

   3. MED

   4. Local preference

4. Which of the following correctly describes how IBGP differs from EBGP?

   1. IBGP peers to the interface address while EBGP peers to loopbacks

   2. IBGP updates do not alter the next hop attribute

   3. EBGP updates do not alter the next hop

   4. EBGP requires a full mesh

5. When export policy is specified at the global, group, and neighbor levels, which policy is executed?

   1. Only the least specific, which is global export

   2. Only the most specific, which is neighbor-level export

   3. All three are chained, and the global, group, and neighbor policies are executed

   4. None of the above; export can be defined only at the group level

6. When you issue a show bgp summary command, what is indicated by the Active state?

   1. The router is actively trying to form the BGP session; you should wait

   2. The session is established and active; you are done

   3. The router is unable to even route the session; you should suspect a routing problem

   4. At least one route has been received and made active

7. What command displays the routes you are receiving from a BGP peer?

   1. show route advertising-protocol bgp

   2. show route receive-protocol bgp

   3. show route protocol ...