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Juniper JN0-649 Exam Syllabus Topics:
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NEW QUESTION 26
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?
- A. PIM join load-balancing also be configured.
- B. IGMP snooping must be configured.
- C. The interface must be specified to use for load balancing
- D. The clear pim join-distribution command must be issued.
Answer: D
NEW QUESTION 27
In a Layer 2 environment where 802.1X is deployed, which two statements are correct? (Choose two.)
- A. Extensible Authentication Protocol messages are exchanged between the supplicant and the authenticator.
- B. RADIUS messages are exchanged between the authenticator and the authentication server.
- C. RADIUS messages are exchanged between the supplicant and the authenticator.
- D. Extensible Authentication Protocol messages are exchanged between the authenticator and the authentication server.
Answer: A,B
Explanation:
https://en.wikipedia.org/wiki/IEEE_802.1X
NEW QUESTION 28
Which two statements are true about the 802. 1X output shown in the exhibit? (Choose two.)
- A. EAPoL traffic will not be sent out of the use ge-0/0/1 interface
- B. The supplicant is not authenticated using 802. 1X
- C. EAPoL traffic will be sent out of the ge-0/0/1 interface.
- D. The supplicant is authenticated using 802. 1X
Answer: B,C
NEW QUESTION 29
You have configured CoS on a Junos device. A packet is classified as best effort by a behavior aggregate (BA) classifier, and as expedited forwarding by a multifield (MF) classifier.
Which statement is true in this scenario?
- A. The packet will be placed in a queue associated with the MF classifier.
- B. The packet will be placed in a queue associated with the BA classifier.
- C. The packet will be placed into the queue which is least congested.
- D. The packet will be placed into the queue that has the most bandwidth assigned to it.
Answer: A
Explanation:
https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/cos-configuring- multifield-classifiers.html
>> "If you configure both a behavior aggregate (BA) classifier and a multifield classifier, BA classification is performed first; then multifield classification is performed. If they conflict, any BA classification result is overridden by the multifield classifier."
NEW QUESTION 30
You must ensure that all routes in the 10.0.0/8 address range are not advertised outside of your AS.
Which well-known BGP community should be assigned to these addresses to accomplish this task?
- A. no-export
- B. no-advertise
- C. internet
- D. no-peer
Answer: A
Explanation:
For specifying the BGP community attribute only, you also can specify community-ids as one of the following well-known community names defined in RFC 1997:
no-advertise-Routes containing this community name are not advertised to other BGP peers.
no-export-Routes containing this community name are not advertised outside a BGP confederation boundary.
no-export-subconfed-Routes containing this community are advertised to IBGP peers with the same AS number, but not to members of other confederations.
llgr-stale-Adds a community to a long-lived stale route when it is readvertised.
no-llgr-Marks routes which a BGP speaker does not want to be retained by LLGR. The Notification message feature does not have any associated configuration parameters.
https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/ref/statement/community-edit-routing-options.html
NEW QUESTION 31
Referring to the exhibit, on which three IS-IS routers will the attached bit be set? (Choose three.)
- A. R2
- B. R6
- C. UR3
- D. R4
- E. UR5
Answer: A,B,C
NEW QUESTION 32
Juniper devices use the token bucket algorithm for policing. Which two statements are true regarding the token bucket algorithm? (Choose two.)
- A. Policers reduce the speed of an interface.
- B. Policers enforce gaps between transmitted packets.
- C. Policers transmit streams of traffic at the maximum interface speed until the burst rate is reached.
- D. Policers do not reduce the speed of an interface.
Answer: B,D
NEW QUESTION 33
What is the correct authentication processing order on EX Series switches when multiple Layer 2 authentication methods are enabled?
- A. MAC RADIUS -> 1x -> captive portal
- B. 802.1x -> MAC RADIUS -> captive portal
- C. captive portal-> MAC RADIUS -> 802.1x
- D. 802.1x-> captive portal -> MAC RADIUS
Answer: B
NEW QUESTION 34
Click the Exhibit.
The Receiver is attempting to join two different groups, one from each source. You want to endure that load balancing is taking place.
Referring to the exhibit, which statement is true?
- A. R2 must have join-load-balance configured under protocol PIM.
- B. R3 must have join-load-balance configured under protocol PIM.
- C. R1 must have join-load-balance configured under protocol PIM.
- D. R4 must have join-load-balance configured under protocol PIM.
Answer: D
Explanation:
https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/mcast-pim-join- load-balance.html
NEW QUESTION 35
Your network has an unmanaged switch between the hosts and your EX Series switch. After the traffic enters the EX Series switch, each host must be on a separate VLAN.
How would you accomplish this task?
- A. Configure interface ge-0/0/3 to a mode trunk to assign the VLANs.
- B. Configure VSTP on interface ge-0/0/1 to assign the VLANs.
- C. Configure an output firewall filter on interface ge-0/0/1 to match the destination MAC or IP address of the hosts to assign the VLANs.
- D. Configure an input firewall filter on interface ge-0/0/3 to match the source MAC or IP address of the hosts to assign the VLANs.
Answer: A
NEW QUESTION 36
Which two multicast listener registration protocols are supported in the Junos operating system? (Choose two.)
- A. PIM
- B. IGMP
- C. DVMRP
- D. MLD
Answer: B,D
Explanation:
internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) are the Multicast Group Membership Discovery (MGMD) protocols
NEW QUESTION 37
Which address range is used for source-specific multicast?
- A. 232.0.0.0/8
- B. 239.0.0.0/8
- C. 224.2.0.0/16
- D. 233.0.0.0/8
Answer: A
NEW QUESTION 38
You are asked to configure 802.1X on your access ports to allow only a single device to authenticate. In this scenario, which configuration would you use?
- A. single supplicant mode
- B. single-secure supplicant mode
- C. multiple supplicant mode
- D. MAC authentication mode
Answer: A
NEW QUESTION 39
Referring to the log shown in the exhibit, what is the problem with the OSPF adjacency establishment?
- A. The OSPF database description packet is malformed.
- B. There is an MDS authentication mismatch.
- C. The referenced IP address does not exist on the network segment.
- D. The interface IP addresses on the subnet are duplicates.
Answer: D
NEW QUESTION 40
You have an IPv4 multicast network configured as PIM-SM. What must be done before replacing your static RP with auto-RP?
- A. Configure each router in the network as a candidate BSR.
- B. Enable each router in the network to forward multicast packets.
- C. Enable sparse-dense mode on each of the routers in the network.
- D. Configure auto-RP domains on each router in the network.
Answer: C
Explanation:
https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/mcast-pim-auto- rp.html
"Because PIM dense mode is necessary to enable auto-RP to work, which in turns enables PIM sparse mode to work, you must configure PIM sparse-dense mode in the PIM domains that use auto-RP."
NEW QUESTION 41
You are deploying IP phones in your enterprise networks. When plugged in, the IP phones must automatically negotiate the power requirements for the new connection with the EX Series switches. In this scenario, which protocol should be used to enable this behavior?
- A. LLDP-MED
- B. MP-BGP
- C. LLDP
- D. CDP
Answer: A
NEW QUESTION 42
You must ensure that all management traffic sourced from your Junos devices is set with a specific DSCP code-point value.
Which action will accomplish this task?
- A. Apply the DSCP code-point to the [edit class-of-service host-outbound-traffic] hierarchy.
- B. Apply the DSCP code-point in an egress policer.
- C. Apply the DSCP code-point to a rewrite rule.
- D. Apply the DSCP code-point to the [edit class-of-service interface lo0.0] hierarchy
Answer: A
Explanation:
https://www.juniper.net/documentation/en_US/junos/topics/concept/cos-host-outbound-traffic- default-classification-and-dscp-remarking.html To change these default settings, include the forwarding-class class-name statement and the dscp-code-point value statement at the [edit class-of-service host-outbound-traffic] hierarchy level. This feature does not affect transit traffic or incoming traffic.
NEW QUESTION 43
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. If the total power consumption exceeds 90 watts, the ge-0/0/11 interface will continue to receive power.
- B. The maximum wattage that this switch can allocate to attached Ethernet devices is 100 watts.
- C. PoE is not enabled on the ge-0/0/0 interface.
- D. The ge-0/0/10 interface supports PoE+.
Answer: B,D
Explanation:
POE is enabled in the interface ge-0/0/0 but nothing is connected to it. switch is in AT mode (poe+) and interface ge-0/0/11 supports poe+ judging by maximun wattage
NEW QUESTION 44
Which two statements are true regarding bidirectional PIM? (Choose two )
- A. It uses multicast tunneling to forward traffic
- B. Forwarding paths can be suboptimal
- C. It eliminates the need for an RP.
- D. Devices only store group specific entries.
Answer: B,D
NEW QUESTION 45
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