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Juniper JN0-664 Cheap Dumps, Study Materials JN0-664 Review

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Juniper Service Provider, Professional (JNCIP-SP) Sample Questions (Q39-Q44):

NEW QUESTION # 39
Exhibit

Referring to the exhibit, which two statements are correct about the dual route reflectors within a cluster?
(Choose two.)

A. RR1 and RR2 must have the same duster ID to exchange routes learned from the client.
B. RR1 and RR2 advertise routes learned from the clients to EBGP peers, using itself as the next hop.
C. RR1 advertises routes from the client to RR2. using itself as the next hop.
D. RR1 and RR2 append the duster ID when advertising routes from dient to dient.

Answer: B,D

NEW QUESTION # 40
You are configuring a Layer 3 VPN between two sites. You are configuring the vrf-target target : 65100:100 statement in your routing instance.
In this scenario, which two statements describe the vrf-target configuration? (Choose two.)

A. This value is used to add a target community to BGP routes advertised to the local CE device.
B. This value is used to identify BGP routes learned from the local CE device.
C. This value is used to add a target community to BGP routes advertised to the remote PE device.
D. This value is used to identify BGP routes learned from the remote PE device.

Answer: C,D

Explanation:
The `vrf-target` statement in a Layer 3 VPN configuration is used to control the import and export of VPN routes by attaching a target community to the routes. This helps in defining which VPN routes should be imported into or exported from a particular VRF (Virtual Routing and Forwarding) instance.
1. **Understanding VRF Target**:
- The `vrf-target` statement specifies the extended community attributes (route targets) that are used to control the import and export of routes in a VRF.
- These attributes help in identifying which routes should be shared between different VRFs, particularly across different PE (Provider Edge) devices.
2. **Statements Analysis**:
- **A. This value is used to identify BGP routes learned from the local CE device.**
- Incorrect. The `vrf-target` attribute is not used to identify routes learned from the local CE device. It is used to manage routes between PE devices and within the provider's MPLS network.
- **B. This value is used to identify BGP routes learned from the remote PE device.**
- Correct. The `vrf-target` value helps in identifying which routes from remote PE devices should be imported into the local VRF. It essentially acts as a filter for importing BGP routes with matching target communities.
- **C. This value is used to add a target community to BGP routes advertised to the local CE device.**
- Incorrect. Routes advertised to the local CE device do not use the `vrf-target` attribute. Instead, these routes are typically managed within the local VRF routing table.
- **D. This value is used to add a target community to BGP routes advertised to the remote PE device.**
- Correct. When advertising routes from the local PE to remote PE devices, the `vrf-target` value is added to these routes. This target community ensures that the correct routes are shared across the VPN.
**Conclusion**:
The correct statements about the `vrf-target` configuration in a Layer 3 VPN scenario are:
**B. This value is used to identify BGP routes learned from the remote PE device.**
**D. This value is used to add a target community to BGP routes advertised to the remote PE device.**
**Reference**:
- Juniper Networks Documentation on VRF Target: [VRF Target Configuration](https://www.juniper.net/documentation/en_US/junos/topics/topic-map/layer-3-vpns.html)
- MPLS and VPN Architectures by Ivan Pepelnjak and Jim Guichard

NEW QUESTION # 41
Refer to the exhibit.

Click the Exhibit button.
You have an OSPF environment. You have recently added a router called R4 that is directly connected to R1 and R2. You discover that R4 is only peering with R2.
Referring to the exhibit, how would you correct the peering?

A. Change the MTU size on R1 and R2 to be 22 bytes higher than R4's MTU size.
B. Adjust the Dead Interval on R4 to match the Dead Interval on R1 and R2.
C. Adjust the Priority on R1 to be lower than the Priority on R4.
D. Adjust the Hello Interval on R1 and R2 to match the Hello Interval on R4.

Answer: D

NEW QUESTION # 42

A. Change the MTU size on R1 and R2 to be 22 bytes higher than R4's MTU size.
B. Adjust the Dead Interval on R4 to match the Dead Interval on R1 and R2.
C. Adjust the Priority on R1 to be lower than the Priority on R4.
D. Adjust the Hello Interval on R1 and R2 to match the Hello Interval on R4.

Answer: D

NEW QUESTION # 43
Exhibit

Which two statements about the output shown in the exhibit are correct? (Choose two.)

A. There has been a VLAN ID mismatch.
B. The PE router has the capability to pop flow labels
C. The connection has not flapped since it was initiated.
D. The PE is attached to a single local site.

Answer: B,D

Explanation:
Explanation
According to 1 and 2, BGP Layer 2 VPNs use BGP to distribute endpoint provisioning information and set up pseudowires between PE devices. BGP uses the Layer 2 VPN (L2VPN) Routing Information Base (RIB) to store endpoint provisioning information, which is updated each time any Layer 2 virtual forwarding instance (VFI) is configured. The prefix and path information is stored in the L2VPN database, which allows BGP to make decisions about the best path.
In the output shown in the exhibit, we can see some information about the L2VPN RIB and the pseudowire state. Based on this information, we can infer the following statements:
* The PE is attached to a single local site. This is correct because the output shows only one local site ID (1) under the L2VPN RIB section. A local site ID is a unique identifier for a site within a VPLS domain.
If there were multiple local sites attached to the PE, we would see multiple local site IDs with different prefixes.
* The connection has not flapped since it was initiated. This is correct because the output shows that the uptime of the pseudowire is equal to its total uptime (1w6d). This means that the pseudowire has been up for one week and six days without any interruption or flap.
* There has been a VLAN ID mismatch. This is not correct because the output shows that the remote and local VLAN IDs are both 0 under the pseudowire state section. A VLAN ID mismatch occurs when the remote and local VLAN IDs are different, which can cause traffic loss or misdelivery. If there was a VLAN ID mismatch, we would see different values for the remote and local VLAN IDs.
* The PE router has the capability to pop flow labels. This is correct because the output shows that the flow label pop bit is set under the pseudowire state section. The flow label pop bit indicates that the PE router can pop (remove) the MPLS flow label from the packet before forwarding it to the CE device.
The flow label is an optional MPLS label that can be used for load balancing or traffic engineering purposes.

NEW QUESTION # 44
......

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