JN0-648 Online Training Archives

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1. Exhibit.

Referring to the exhibit, which two statements are true regarding Q-in-Q tunneling? {Choose two)

The C-VLAN traffic will be encapsulated with an outer VLAN tag of 10.

The C-VLANs 100-200 will be sent as the inner VLAN tag

The C-VLAN 150 will be sent as the inner VLAN tag

The C-VLAN traffic will be encapsulated with an outer VLAN lag of 150

2. Exhibit.

Referring to the exhibit, a RMSM network is set up to enable communication between multicast devices.

Which statement is true in this scenario?

After the formation of the shortest-path tree, a join message is sent from R2 to R1.

After the formation of the shortest-path tree, a join message is sent from R1 to R5

After the formation of the shortest-path tree, a prune message is sent from R1 to R2.

After the formation of the shortest-path free, a prune message is sent from R1 to R5.

3. In IS-IS advertising POUs with the overload bit has which effect?

The local device will no longer be used for transit traffic

The local device's POUs are marked with a metric of 65535

The ISIS adjacencies become passive

The IS-IS adjacencies enter the "new" state

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

mixed

standalone

class

static

5. You have an MX960 configured as a Fusion aggregation device (AD) and two QFX5100 switches as satellite devices (SD). You have configured local-switching for each SD. A packet with an unknown MAC address is received on one of the SD extended ports.

Which statement is correct in this scenario?

The packet is dropped and a reject message is sent out to the port where it was received.

The packet is silently discarded and a reject message is sent to the A

The packet is flooded out of all the ports on the SD except the one where it was received.

The packet is sent to the AD to be processed and forwarded. D18912E1457D5D1DDCBD40AB3BF70D5D

6. Click the Exhibit button.

You are adding VNI 101 to your EVPN-VXLAN network, but traffic is not being sent or received.

Referring to the exhibit, which configuration statement will solve the problem?

set routing-instances EVPN1 instance-type evpn

set routing-instances EVPN1 vxlan encapsulate-inner-vlan

set routing-instances EVPN1 bridge-domains BD-101 vxlan vni 101

set routing-instances EVPN1 vrf-table-label

7. Click the Exhibit button.

Referring to the exhibit, which statement is correct?

This router is an ASB

This router is an AB

This router is connected to 27 different areas.

This router originated the LS

8. 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?

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

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

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

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

9. Your company has expanded into office space across the street. The new office space has a single Ethernet

connection connected to an unmanaged switch. You must sort traffic based on the IP address into different VLANs once the traffic arrives on your EX Series switches.

Which mechanism would you use to accomplish this task?

MVRP

filter-based VLANs

Q-in-Q tunneling

dynamic VLANs

10. 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?

Type 2

Type 3

Type 1

Type 5

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11. You are deploying PIM source-specific multicast (SSM) for a new multicast messaging service. You have configured the multicast source to use 235.44.123.100 as the multicast address. You are not able to join the PIM SSM multicast feed.

Which two solutions would resolve this problem? (Choose two.)

Reconfigure the multicast source to use an address in the range of 224.0.0.0 through 224.255.255.255.

Reconfigure the multicast source to use an address in the range of 232.0.0.0 through 232.255.255.255.

Add the multicast address to the [edit routing-options multicast ssm-map] stanza.

Add the multicast address to the [edit routing-options multicast ssm-groups] stanza.

12. Click the Exhibit button.

You have configured MSTP in your Layer 2 network. You are having problems with it establishing correctly.

Referring to the exhibit, what is causing the problem?

You must assign a context ID number other than zero

The MSTI-to-VLAN mapping does not match

The region name is not correct

The revision number is the same on both devices

13. You are currently using VLAN IDs 2 through 300 within your Layer 2 domain and you need to configure VSTP to prevent loops You must ensure that all VL ANs are loop free.

In this scenario, which statement is correct?

You must enable RSTP to account for all VLANs.

You must ensure that the VLANs are balanced between two different root bridges.

You must ensure that the bridge priority is set to the lowest value on all switches in the Layer 2 domain.

You must enable all VLANs, 2 through 300, under the VSTP configuration

14. 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?

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

Implement bidirectional PIM

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

Implement MLD

15. Exhibit.

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

The interface IP addresses on the subnet are duplicates.

There is an MDS authentication mismatch.

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

The OSPF database description packet is malformed.

16. Your IPv4 multicast network uses different MX Series routers for the source DR and the PIM sparse-mode RP.

What is required before PIM register messages are exchanged between the DR and RP routers?

Add a tunnel services PIC to the RP router.

Add an adaptive services PIC to the DR router.

Enable tunnel services on the DR and RP routers.

Configure PIM encapsulation on the DR and RP routers.

17. Exhibit.

YourNet is learning the 210.210.40.0/24 route from Provider A and Provider B YourNet would like to forward traffic destined to the 210.210.40.0/24 networking using Provider B.

Referring to the exhibit, how would you accomplish this task?

Add the well-known no-export community to the routes learned through R2.

Apply an export policy to R1's IBGP peers to set a higher local preference.

Add the well-known no-export community to the routes learned through R1.

Apply an export policy to R2's IBGP peers to set a Their local preference.

18. Which two statements about BGP communities are true? (Choose two.)

A prefix can only belong to one community.

A prefix can belong to more than community.

A community is not a transitive attribute.

A BGP device can set, append, or modify the community of a route.

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

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

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

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

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

20. 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?

Apply the DSCP code-point to the [edit class-of-service host-outbound-traffic] hierarchy.

Apply the DSCP code-point to the [edit class-of-service interface lo0.0] hierarchy

Apply the DSCP code-point in an egress policer.

Apply the DSCP code-point to a rewrite rule.

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21. Click the Exhibit button.

You are configuring BGP policies for a site with a dual-homed connection as shown in the exhibit. You must ensure that inbound traffic from Internet hosts flow through the ISP A connection.

Which statement is correct in this scenario?

Apply a BGP export policy on R1 to assign a lower MED value to routes advertised to ISP A

Apply a BGP export policy on R1 to assign a higher local preference value to routes advertised to ISP A

Apply a BGP export policy onR2to assign a lower origin value to routes advertised to ISP B

Apply a BGP export policy to R2 to prepend [65001 65001 65001 65001 65001] to the AS path of routes advertised to ISP B

22. You are redistributing static routes into an OSPF area.

Which two statement are true is this scenario? (Choose two.)

The external route advertisements have a domain scope.

The area must be stub area.

The area must be the backbone area.

The routes can be advertised in type 7 LSAs.

23. Exhibit.

A router is attempting to form an OSPF neighborship with another router. However, the OSPF neighborship fails to establish completely.

Referring to the exhibit, what is the problem?

There is an OSPF area mismatch

There is an interface MTU mismatch

There is an interface subnet mask mismatch

There is an interface type mismatch

24. Which statement is correct about MSTP?

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

MSTP enables dynamic discovery of Layer 2 neighbors.

MSTP dynamically manages VLAN registration in a LAN

MSTP uses slacked VLAN tags to extend a Layer 2 Ethernet connection between multiple sites

25. You have an IPv4 multicast network configured as PIM-SM.

What must be done before replacing your static RP with auto-RP?

Enable sparse-dense mode on each of the routers in the network.

Configure auto-RP domains on each router in the network.

Configure each router in the network as a candidate BS

Enable each router in the network to forward multicast packets.

26. You are enabling MSTP in your Layer 2 network to prevent loops.

In this scenario, which three parameters must match on all switches in the network? (Choose three. )

configuration name

bridge priority

MSTI-to-VLAN mapping

max age

revision level

27. which protocol is a multicast routing protocol?

OSPF

BGP

PIM

IS-IS

28. You are asked to deploy 802.1X on your EX Series switches. You need to ensure authenticated devices continue to have access to the network even if the authentication server fails.

Which action meets this configuration objective?

Configure the server fail fallback with a value of sustain.

Set the reauthentication interval to a value of 0.

Configure the static MAC bypass for the authentication server.

Set the reauthentication interval to a value of disable.

29. Click the Exhibit button.

The policy shown in the exhibit is applied as an export policy to your BGP neighborship.

Which action will be taken for route 12.233.45.5?

It will be evaluated by the next policy.

It will be accomplished by term 1.

It will be accepted by term 1.

It will be rejected by term 2.

It will be accepted by the default policy

30. You are using 802.1X in your access network consisting of EX Series switches. You recently had a failure with your RADIUS server which resulted in authenticating client devices being denied access to the network. You want to change this behavior so that authenticating clients are directed to a remediation VLAN.

Which RADIUS server failback setting satisfies this requirement?

permit

move

sustain

deny