JN0-648 Online Practice Questions and Answers

You have PIM SM multicast configured and running in a network environment comprised of EX4300 devices. Your customers report increased delay when switching channels using IPTV. To help decrease the delay, you implement PIM join load balancing. You add the set protocols pim join-loadbalance command to the configuration. After committing, you notice that the flows are still using only one path.

In this scenario, which statement is correct?

A. The clear pim join-distributioncommand must be issued.

B. The interfaces must be specified to use for load balancing.

C. IGMP snooping must also be configured.

D. PIM join load-balancing only works for PIM-DM.

What are two supported PoE management modes? (Choose two.)

A. class

B. standalone

C. static

D. mixed

You notice a mass withdrawal of routes for some of the network hosts. You determine that the link on the ESI interface is down.

Which route type is used in this scenario?

A. Type 2

B. Type 3

C. Type 1

D. Type 5

Which statement is correct about MSTP?

A. MSTP enables mapping multiple independent spanning-tree instances onto one physical topology.

B. MSTP enables dynamic discovery of Layer 2 neighbors.

C. MSTP dynamically manages VLAN registration in a LAN.

D. MSTP uses stacked VLAN tags to extend a Layer 2 Ethernet connection between multiple sites.

Which two statements about OSPF routing policies are correct? (Choose two.)

A. By default, OSPF export policies reject network-summary LSAs.

B. By default, OSPF export policies accept network-summary LSAs.

C. By default, OSPF import policies accept network-summary LSAs.

D. By default, OSPF import policies reject network-summary LSAs.

Click the Exhibit button.

Referring to the log shown in the exhibit, what is the problem with the OSPF adjacency establishment?

A. There is an MD5 authentication mismatch.

B. The OSPF database description packet is malformed.

C. The interface IP addresses on the subnet are duplicates.

D. The referenced IP address does not exist on the network segment.

You are designing a multicast topology to support IPv4 IPTV broadcasts in your organization. The design should support multiple multicast senders with overlapping group addresses while preventing interference between them. Client devices currently do not support IGMPv3.

Which approach would fulfill these requirements?

A. Implement MLD.

B. Assign group addresses in the 224/4 range and implement PIM-DM.

C. Implement PIM-SM and SSM with SSM maps to support IGMPv2 clients.

D. Implement bidirectional PIM.

When redistributing IGP routes into BGP, what information is used by default on Junos platforms to determine the BGP route's MED attribute value?

A. the IGP Metric

B. routing information base

C. the IGP route preference

D. route protocol source

You are deploying IP phones to a customer site. The IP phones will be installed to share a common access port with the user's desktop computer. You are required to provide a mechanism to place user data traffic and voice traffic in different VLANs for class-of-service application.

How would you implement this solution?

A. Configure flexible VLAN tagging on the user ports with the data and voice VLANs as members.

B. Apply a multifield classifier on the access ports that assigns voice packets to the assured-forwarding class, based on the IP phone manufacturer's MAC OUI.

C. Configure the IP phones to label voice traffic with the DSCP of code point and apply a BA classifier to the access ports to classify voice traffic.

D. Configure VLAN tagging on the IP phones and use the voice VLAN feature on the access ports to assign tagged frames to the voice VLAN and untagged frames to a data VLAN.

Which EVPN route type is used for fast convergence and for advertising the split horizon label?

A. Type 4

B. Type 2

C. Type 5

D. Type 1