Juniper JN0-648 JNCIP-ENT Exam Practice Test Instant Access

Question 1

Exhibit.

You have applied the CoS configuration shown in the exhibit to an EX4300 switch.

Which two statements are true? (Choose two. )

AAll strict-high priority queues are serviced in a round-robin fashion as long as they have remaining credits

BAll strict-high priority queues are serviced in a round-robin fashion regardless of available credits.

CPackets in low priority queues transmit only when start-high priority queues are empty

DPackets in low priority queues are serviced when strict-high priority queues have no available credits

Answer : A, C

Question 2

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

In this scenario, which statement is correct?

AThe interface must be specified to use for load balancing

BPIM join load-balancing also be configured.

CIGMP snooping must be configured.

DThe clear pim join-distribution command must be issued.

Answer : D

https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/mcast-pim-join-load-balance.html

The clear pim join-distribution command redistributes the existing flows to new or restored upstream neighbors.

Question 3

Exhibit.

You are implementing CoS for a custom application that is labeling its packets with DSCP code-point 101111. You have applied the configuration shown in the exhibit, but not that while some custom application traffic ingressin on ge-0/0/1 transits the SRX Series device successfully, packets ingressing all other ge-* interfaces are being dropped.

Which action should you take to solve this problem?

AConfigure a scheduler and scheduler map for expedited-forwarding and apply to all interfaces.

BModify the BA classifier to assign code point 101111 to loss priority low.

CRemove the BA classifier from all ge-interfaces.

DApply the rate-limit-ef policer to all ge-interfaces.

Answer : D

Question 4

Packets enter a Juniper device and are classified as best effort. During the processing of the packet, the classification of the packets is changed to expedited forwarding by a multi-field classifier. The device is using the default CoS policies

Which statement is true in this scenario?

AThe packet is forwarded according to the new packet classification, and the DSCP bits are rewritten to the new class.

BThe packet is forwarded according to the new packet classification, and the DSCP bits do not change.

CThe packet is forwarded according to the original packet classification, and the DSCP bits do not change.

DThe packet is forwarded according to the original packet classification, and the DSCP bits are rewritten to the new class.

Answer : B

Question 5

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

Amixed

Bstandalone

Cclass

Dstatic

Answer : C, D

Question 6

You are implementing 802.1x access control in your network of EX Series switches. You have some older client devices connecting to your network which do not support 802.1x.

Which statement is true regarding the older devices?

ABy default, the supplicant will send EAP messages and keep the port in an unauthorized state.

BBy default, the authenticator will send EAP messages and keep the port in an unauthorized state.

CBy default, the supplicant will send EAP messages until it reaches a predefined limit, after which it begins to forward traffic.

DBy default, the authenticator will send EAP messages until it reaches a predefined, after which it begins to forward traffic.

Answer : C

Question 7

Which two statements are true about IS-IS levels? (Choose two.)

ALevel 2 systems do not advertise Level 2 routes into a Level area by default.

BLevel 2 systems must use the loopback address as a part of the ISO network address.

CLevel 1 system only from adjacencies with other systems that have different area IDs.

DLevel 1 systems use a default route to reach AS external routes located in other areas.

Answer : A, D

https://www.juniper.net/documentation/en_US/junos/topics/example/example-configuring-is-is-route-leaking-L2-to-L1.html

'By default, IS-IS protocol leaks routing information from a Level 1 area to a Level 2 area. However, to leak routing information from a Level 2 area to a Level 1 area, an export policy must be explicitly configured.'

https://www.juniper.net/documentation/en_US/junos/topics/example/isis-multi-level.html

'An IS-IS Level 2 area is analogous to the OSPF backbone area (0), while a Level 1 area operates much like an OSPF totally stubby area, in that a default route is normally used to reach both inter-level and AS external routes.'

Juniper JN0-648 Enterprise Routing and Switching, Professional Exam JNCIP-ENT Exam Practice Test