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Exam Code: JN0-650

Exam Name: Enterprise Routing and Switching, Professional (JNCIP-ENT)

Certification Provider: Juniper

Corresponding Certification: JNCIP-ENT

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Juniper JN0-650 Practice Test 39

Question 380

An enterprise network designer recommends: Apply a carefully scoped multicast policy or boundary to the prohibited group range. Which situation most clearly calls for this action?

  1. An ASM service needs resilient RP access from different sites while clients use a single logical RP address.
  2. A Junos multicast border router must permit only explicitly approved multicast groups for forwarding across a policy boundary.
  3. Two independent anycast RPs must learn sources registered at the other RP in an ASM network.
  4. A company must keep a specific internal multicast channel from crossing the enterprise perimeter.

Explanation

Correct Answer

D:

This case requires the Multicast group scoping action. Multicast control or data exchange for the protected groups can be contained within the intended domain.

Incorrect Answers

A:

This other case would be better matched to Deploy a supported anycast rendezvous-point design across redundant RP nodes. Receivers can use one RP identity while multiple physical routers offer resilient RP service.

B:

This other case would be better matched to Configure and apply supported multicast scoping or group filters for the allowed ranges. Unauthorized groups can be excluded from crossing the controlled boundary.

C:

This other case would be better matched to Use an appropriate Multicast Source Discovery Protocol peering design where supported. Source-active information can be shared between participating RP nodes.

Question 381

A Junos multicast border router must permit only explicitly approved multicast groups for forwarding across a policy boundary. Which Junos networking action or protocol decision best addresses this requirement?

  1. Use an appropriate Multicast Source Discovery Protocol peering design where supported.
  2. Configure and apply supported multicast scoping or group filters for the allowed ranges.
  3. Deploy a supported anycast rendezvous-point design across redundant RP nodes.
  4. Apply a carefully scoped multicast policy or boundary to the prohibited group range.

Explanation

Correct Answer

B:

This action addresses Multicast import policy. Unauthorized groups can be excluded from crossing the controlled boundary.

Incorrect Answers

A:

That action targets MSDP source coordination: Source-active information can be shared between participating RP nodes. It does not directly resolve the stated Multicast import policy requirement.

C:

That action targets Anycast RP resiliency: Receivers can use one RP identity while multiple physical routers offer resilient RP service. It does not directly resolve the stated Multicast import policy requirement.

D:

That action targets Multicast group scoping: Multicast control or data exchange for the protected groups can be contained within the intended domain. It does not directly resolve the stated Multicast import policy requirement.

Question 382

A Junos network engineer takes this step: Configure and apply supported multicast scoping or group filters for the allowed ranges. Which outcome most directly follows?

  1. Receivers can use one RP identity while multiple physical routers offer resilient RP service.
  2. Multicast control or data exchange for the protected groups can be contained within the intended domain.
  3. Unauthorized groups can be excluded from crossing the controlled boundary.
  4. Source-active information can be shared between participating RP nodes.

Explanation

Correct Answer

C:

This is the direct result of the Multicast import policy decision: Unauthorized groups can be excluded from crossing the controlled boundary.

Incorrect Answers

A:

This outcome is associated with Anycast RP resiliency (Deploy a supported anycast rendezvous-point design across redundant RP nodes.), not the specified action.

B:

This outcome is associated with Multicast group scoping (Apply a carefully scoped multicast policy or boundary to the prohibited group range.), not the specified action.

D:

This outcome is associated with MSDP source coordination (Use an appropriate Multicast Source Discovery Protocol peering design where supported.), not the specified action.

Question 383

A Junos multicast border router must permit only explicitly approved multicast groups for forwarding across a policy boundary. A colleague instead suggests: Deploy a supported anycast rendezvous-point design across redundant RP nodes. Which corrective approach most directly addresses the original issue?

  1. Use an appropriate Multicast Source Discovery Protocol peering design where supported.
  2. Deploy a supported anycast rendezvous-point design across redundant RP nodes.
  3. Apply a carefully scoped multicast policy or boundary to the prohibited group range.
  4. Configure and apply supported multicast scoping or group filters for the allowed ranges.

Explanation

Correct Answer

D:

This corrective choice addresses Multicast import policy. Unauthorized groups can be excluded from crossing the controlled boundary.

Incorrect Answers

A:

That alternative applies to MSDP source coordination instead. Source-active information can be shared between participating RP nodes.

B:

That alternative applies to Anycast RP resiliency instead. Receivers can use one RP identity while multiple physical routers offer resilient RP service.

C:

That alternative applies to Multicast group scoping instead. Multicast control or data exchange for the protected groups can be contained within the intended domain.

Question 384

An enterprise network designer recommends: Configure and apply supported multicast scoping or group filters for the allowed ranges. Which situation most clearly calls for this action?

  1. A Junos multicast border router must permit only explicitly approved multicast groups for forwarding across a policy boundary.
  2. An ASM service needs resilient RP access from different sites while clients use a single logical RP address.
  3. A company must keep a specific internal multicast channel from crossing the enterprise perimeter.
  4. Two independent anycast RPs must learn sources registered at the other RP in an ASM network.

Explanation

Correct Answer

A:

This case requires the Multicast import policy action. Unauthorized groups can be excluded from crossing the controlled boundary.

Incorrect Answers

B:

This other case would be better matched to Deploy a supported anycast rendezvous-point design across redundant RP nodes. Receivers can use one RP identity while multiple physical routers offer resilient RP service.

C:

This other case would be better matched to Apply a carefully scoped multicast policy or boundary to the prohibited group range. Multicast control or data exchange for the protected groups can be contained within the intended domain.

D:

This other case would be better matched to Use an appropriate Multicast Source Discovery Protocol peering design where supported. Source-active information can be shared between participating RP nodes.

Question 385

A printer attached to a switch must communicate on VLAN 120 without inserting 802.1Q tags itself. Which Junos networking action or protocol decision best addresses this requirement?

  1. Configure routed IRB interfaces and associated VLAN gateway bindings.
  2. Configure the endpoint-facing interface as an appropriate untagged access member of VLAN 120.
  3. Connect the permitted gateway using the private VLAN promiscuous-port role.
  4. Use the supported private VLAN isolated-port behavior with a suitable promiscuous uplink.

Explanation

Correct Answer

B:

This action addresses Access port assignment. Untagged frames from the printer are associated with the intended access VLAN.

Incorrect Answers

A:

That action targets IRB L3 gateway: The switch can route between the configured Layer 2 broadcast domains under security policy. It does not directly resolve the stated Access port assignment requirement.

C:

That action targets Private VLAN promiscuous uplink: The gateway can serve isolated downstream hosts without making the hosts mutually reachable. It does not directly resolve the stated Access port assignment requirement.

D:

That action targets Private VLAN isolation: Isolated hosts can reach permitted upstream services without communicating directly with each other. It does not directly resolve the stated Access port assignment requirement.

Question 386

A Junos network engineer takes this step: Configure the endpoint-facing interface as an appropriate untagged access member of VLAN 120. Which outcome most directly follows?

  1. The gateway can serve isolated downstream hosts without making the hosts mutually reachable.
  2. The switch can route between the configured Layer 2 broadcast domains under security policy.
  3. Untagged frames from the printer are associated with the intended access VLAN.
  4. Isolated hosts can reach permitted upstream services without communicating directly with each other.

Explanation

Correct Answer

C:

This is the direct result of the Access port assignment decision: Untagged frames from the printer are associated with the intended access VLAN.

Incorrect Answers

A:

This outcome is associated with Private VLAN promiscuous uplink (Connect the permitted gateway using the private VLAN promiscuous-port role.), not the specified action.

B:

This outcome is associated with IRB L3 gateway (Configure routed IRB interfaces and associated VLAN gateway bindings.), not the specified action.

D:

This outcome is associated with Private VLAN isolation (Use the supported private VLAN isolated-port behavior with a suitable promiscuous uplink.), not the specified action.

Question 387

A printer attached to a switch must communicate on VLAN 120 without inserting 802.1Q tags itself. A colleague instead suggests: Use the supported private VLAN isolated-port behavior with a suitable promiscuous uplink. Which corrective approach most directly addresses the original issue?

  1. Configure routed IRB interfaces and associated VLAN gateway bindings.
  2. Connect the permitted gateway using the private VLAN promiscuous-port role.
  3. Use the supported private VLAN isolated-port behavior with a suitable promiscuous uplink.
  4. Configure the endpoint-facing interface as an appropriate untagged access member of VLAN 120.

Explanation

Correct Answer

D:

This corrective choice addresses Access port assignment. Untagged frames from the printer are associated with the intended access VLAN.

Incorrect Answers

A:

That alternative applies to IRB L3 gateway instead. The switch can route between the configured Layer 2 broadcast domains under security policy.

B:

That alternative applies to Private VLAN promiscuous uplink instead. The gateway can serve isolated downstream hosts without making the hosts mutually reachable.

C:

That alternative applies to Private VLAN isolation instead. Isolated hosts can reach permitted upstream services without communicating directly with each other.

Question 388

An enterprise network designer recommends: Configure the endpoint-facing interface as an appropriate untagged access member of VLAN 120. Which situation most clearly calls for this action?

  1. A printer attached to a switch must communicate on VLAN 120 without inserting 802.1Q tags itself.
  2. Hosts in two separate VLANs require routed IP communication through a Junos switch instead of only Layer 2 bridging.
  3. Multiple isolated ports need a shared gateway for routing while remaining blocked from lateral peer communication.
  4. Several untrusted guest appliances share the same primary VLAN but must not communicate directly with each other.

Explanation

Correct Answer

A:

This case requires the Access port assignment action. Untagged frames from the printer are associated with the intended access VLAN.

Incorrect Answers

B:

This other case would be better matched to Configure routed IRB interfaces and associated VLAN gateway bindings. The switch can route between the configured Layer 2 broadcast domains under security policy.

C:

This other case would be better matched to Connect the permitted gateway using the private VLAN promiscuous-port role. The gateway can serve isolated downstream hosts without making the hosts mutually reachable.

D:

This other case would be better matched to Use the supported private VLAN isolated-port behavior with a suitable promiscuous uplink. Isolated hosts can reach permitted upstream services without communicating directly with each other.

Question 389

Two switches need to carry VLANs 30 and 40 between them but VLAN 40 is missing from the allowed trunk list. Which Junos networking action or protocol decision best addresses this requirement?

  1. Place the hosts in an appropriate private VLAN community association.
  2. Configure a supported filter-based VLAN assignment policy for the intended traffic classes.
  3. Add VLAN 40 to the eligible tagged membership on the inter-switch trunk.
  4. Inspect the Ethernet-switching MAC address table for the intended VLAN and interfaces.

Explanation

Correct Answer

C:

This action addresses Trunk VLAN allowance. The uplink can carry tagged traffic for both required VLANs.

Incorrect Answers

A:

That action targets Private VLAN community: Members of the same community can communicate without opening access to separate communities. It does not directly resolve the stated Trunk VLAN allowance requirement.

B:

That action targets Filter-based VLAN selection: Matching traffic can be associated with the VLAN selected by the filter criteria. It does not directly resolve the stated Trunk VLAN allowance requirement.

D:

That action targets MAC learning verification: The operator can determine whether the peer MAC has been learned at the expected port. It does not directly resolve the stated Trunk VLAN allowance requirement.

Question 390

A Junos network engineer takes this step: Add VLAN 40 to the eligible tagged membership on the inter-switch trunk. Which outcome most directly follows?

  1. Matching traffic can be associated with the VLAN selected by the filter criteria.
  2. The operator can determine whether the peer MAC has been learned at the expected port.
  3. Members of the same community can communicate without opening access to separate communities.
  4. The uplink can carry tagged traffic for both required VLANs.

Explanation

Correct Answer

D:

This is the direct result of the Trunk VLAN allowance decision: The uplink can carry tagged traffic for both required VLANs.

Incorrect Answers

A:

This outcome is associated with Filter-based VLAN selection (Configure a supported filter-based VLAN assignment policy for the intended traffic classes.), not the specified action.

B:

This outcome is associated with MAC learning verification (Inspect the Ethernet-switching MAC address table for the intended VLAN and interfaces.), not the specified action.

C:

This outcome is associated with Private VLAN community (Place the hosts in an appropriate private VLAN community association.), not the specified action.

Enterprise Routing and Switching, Professional (JNCIP-ENT) (JN0-650) Practice Tests