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NEW QUESTION # 66
Exhibit.
Referring to the exhibit, which statement is correct?
Answer: C
Explanation:
In OSPF, the election of a Designated Router (DR) and a Backup Designated Router (BDR) is mandatory on broadcast and non-broadcast multi-access (NBMA) network types to manage link-state database synchronization efficiently.
The exhibit shows that both device1 and device2 have their OSPF interface priority explicitly set to 0.
According to the Junos OS 24.4 OSPF implementation:
* Ineligibility (Priority 0): A router with a priority of 0 is strictly ineligible to be elected as a DR or BDR for that segment.
* No Election Possible: When every router on a broadcast segment has a priority of 0, the election process cannot complete because there are no eligible candidates to fill the required roles.
* State Behavior (Stuck in 2-Way): In OSPF adjacency formation, the 2-Way state indicates that bidirectional communication has been established (each router has seen itself in the other's Hello packets). However, to progress to the Exstart and Exchange states on a multi-access network, routers must first identify a DR and BDR.
* Result: Since neither router can become the DR, they both wait indefinitely for a third party (with priority > 0) to take the lead. Consequently, the OSPF adjacency will be stuck in the 2-Way state.
Adjacencies only reach the Full state with the DR and BDR; routers in a "DROther" role remain in 2- Way with each other.
Option A and D are incorrect because the router ID (IP address) only acts as a tiebreaker if priorities are equal and greater than 0. Option B is incorrect because routers cannot reach the Exstart state (where they negotiate master/slave for database exchange) without first having a DR/BDR elected.
NEW QUESTION # 67
Exhibit.
Referring to the exhibit, you see that the 0.0.0.0/0 route is coming from AS 64512.
What is the command to achieve this task?
Answer: C
Explanation:
The exhibit shows a BGP routing process where an Import Policy is being applied to routes received in the RIB-IN. Specifically, Policy 1 states: " Reject 0.0.0.0/0 from AS 64512. " In Junos OS, when a routing policy rejects a route, that route is not placed in the main routing table (inet.0) for active use. Instead, it becomes a hidden route. To verify that a specific peer is actually sending a route that is subsequently being rejected by your policy, you must use specific diagnostic commands:
Understanding " Hidden " Routes: When a BGP route is received but fails to meet policy requirements (or has an unreachable next-hop), Junos keeps it in the BGP RIB-IN but marks it as " hidden. " It will not appear in a standard show route command.
Command Logic (Option D): The command show route receive-protocol bgp < peer ip > hidden allows an administrator to view all routes received from a specific neighbor, including those that were rejected by import policies.
show route receive-protocol bgp < peer ip > : Shows only the routes that passed the import policy and were accepted into the table. Since the 0.0.0.0/0 route from AS 64512 is explicitly rejected in the exhibit, it would not show up here.
Adding the hidden keyword is the essential step to see the rejected default route and verify that AS 64512 is indeed sending it before the policy drops it.
Other Options:
Option A is incorrect because it only shows accepted routes.
Option B and C are used to filter the existing active routing table based on gateway or next-hop attributes, but they cannot show routes that have been rejected and excluded from that table.
NEW QUESTION # 68
Exhibit
As shown in the exhibit, you have implemented CoS classifiers using Differentiated Services Code Point (DSCP) In this scenario, which two statements are correct? (Choose two.)
Answer: C,D
Explanation:
The exhibit shows a custom Behavior Aggregate (BA) classifier named my-classifier for the Differentiated Services Code Point (DSCP) protocol.
Importing Defaults (Statement C): The configuration line import default; is crucial. In Junos OS, when you create a custom classifier, you can use this statement to import the default mapping table for all code points that you have not explicitly defined in the current block. This ensures that only the specific traffic types you care about are customized while the rest follows industry-standard defaults.
Logical Interface Association (Statement A): In the Junos class-of-service hierarchy, classifiers are typically applied to logical interfaces (e.g., ge-0/0/0.0). While they can sometimes be applied at a higher level, the standard practice for enterprise routing and switching is to associate them with the logical unit to provide granular control over subinterfaces or VLAN-tagged traffic.
Why others are incorrect: Statement B is less accurate because the primary binding point in Junos is the unit (logical interface). Statement D is incorrect because the specific classifications defined in the custom block override the defaults; they are not overwritten by them.
NEW QUESTION # 69
When configuring BGP, what is the purpose of using NLRI families inet and inet6?
Answer: C
NEW QUESTION # 70
Exhibit.
Referring to the exhibit, which statement is correct?
Answer: C
Explanation:
In OSPF, the election of a Designated Router (DR) and a Backup Designated Router (BDR) is mandatory on broadcast and non-broadcast multi-access (NBMA) network types to manage link-state database synchronization efficiently.
The exhibit shows that both device1 and device2 have their OSPF interface priority explicitly set to 0.
According to the Junos OS 24.4 OSPF implementation:
Ineligibility (Priority 0): A router with a priority of 0 is strictly ineligible to be elected as a DR or BDR for that segment.
No Election Possible: When every router on a broadcast segment has a priority of 0, the election process cannot complete because there are no eligible candidates to fill the required roles.
State Behavior (Stuck in 2-Way): In OSPF adjacency formation, the 2-Way state indicates that bidirectional communication has been established (each router has seen itself in the other ' s Hello packets). However, to progress to the Exstart and Exchange states on a multi-access network, routers must first identify a DR and BDR.
Result: Since neither router can become the DR, they both wait indefinitely for a third party (with priority >
0) to take the lead. Consequently, the OSPF adjacency will be stuck in the 2-Way state. Adjacencies only reach the Full state with the DR and BDR; routers in a " DROther " role remain in 2-Way with each other.
Option A and D are incorrect because the router ID (IP address) only acts as a tiebreaker if priorities are equal and greater than 0. Option B is incorrect because routers cannot reach the Exstart state (where they negotiate master/slave for database exchange) without first having a DR/BDR elected.
NEW QUESTION # 71
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