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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 64

Question 630

A Junos network engineer takes this step: Configure a dedicated voice VLAN with suitable trunk or access semantics for the phone ports. Which outcome most directly follows?

  1. Voice endpoint network policies can be announced to compatible phones.
  2. Voice and data traffic can be separated into distinct VLANs on the same switching infrastructure.
  3. The engineer can verify device discovery and the voice policy offered on the port.
  4. Tagged voice frames can enter the intended voice broadcast domain instead of being discarded.

Explanation

Correct Answer

B:

This is the direct result of the Voice VLAN separation decision: Voice and data traffic can be separated into distinct VLANs on the same switching infrastructure.

Incorrect Answers

A:

This outcome is associated with LLDP-MED discovery disabled (Enable supported LLDP and LLDP-MED functionality for the voice access port.), not the specified action.

C:

This outcome is associated with LLDP neighbor inspection (Inspect LLDP neighbor detail and advertised LLDP-MED policy information.), not the specified action.

D:

This outcome is associated with Voice tag mismatch (Align the advertised and permitted voice VLAN identifier across the phone and switching port.), not the specified action.

Question 631

Employee PCs and VoIP phones share an office switch but voice packets need their own logical broadcast domain. A colleague instead suggests: Inspect LLDP neighbor detail and advertised LLDP-MED policy information. Which corrective approach most directly addresses the original issue?

  1. Align the advertised and permitted voice VLAN identifier across the phone and switching port.
  2. Inspect LLDP neighbor detail and advertised LLDP-MED policy information.
  3. Configure a dedicated voice VLAN with suitable trunk or access semantics for the phone ports.
  4. Enable supported LLDP and LLDP-MED functionality for the voice access port.

Explanation

Correct Answer

C:

This corrective choice addresses Voice VLAN separation. Voice and data traffic can be separated into distinct VLANs on the same switching infrastructure.

Incorrect Answers

A:

That alternative applies to Voice tag mismatch instead. Tagged voice frames can enter the intended voice broadcast domain instead of being discarded.

B:

That alternative applies to LLDP neighbor inspection instead. The engineer can verify device discovery and the voice policy offered on the port.

D:

That alternative applies to LLDP-MED discovery disabled instead. Voice endpoint network policies can be announced to compatible phones.

Question 632

An enterprise network designer recommends: Configure a dedicated voice VLAN with suitable trunk or access semantics for the phone ports. Which situation most clearly calls for this action?

  1. An IP phone expects automatic switch voice policy but the access port has LLDP-MED advertisement disabled.
  2. A phone tags frames for voice VLAN 210, but the upstream switch accepts only VLAN 200 as the voice VLAN.
  3. A phone is not receiving the expected voice settings and administrators need evidence of whether the switch recognizes it as a neighbor.
  4. Employee PCs and VoIP phones share an office switch but voice packets need their own logical broadcast domain.

Explanation

Correct Answer

D:

This case requires the Voice VLAN separation action. Voice and data traffic can be separated into distinct VLANs on the same switching infrastructure.

Incorrect Answers

A:

This other case would be better matched to Enable supported LLDP and LLDP-MED functionality for the voice access port. Voice endpoint network policies can be announced to compatible phones.

B:

This other case would be better matched to Align the advertised and permitted voice VLAN identifier across the phone and switching port. Tagged voice frames can enter the intended voice broadcast domain instead of being discarded.

C:

This other case would be better matched to Inspect LLDP neighbor detail and advertised LLDP-MED policy information. The engineer can verify device discovery and the voice policy offered on the port.

Question 633

A desk phone sits between the wall switch and a computer; voice is tagged but the computer sends ordinary untagged traffic. Which Junos networking action or protocol decision best addresses this requirement?

  1. Use the supported access-port data VLAN plus tagged voice VLAN design for the phone-PC chain.
  2. Align the advertised and permitted voice VLAN identifier across the phone and switching port.
  3. Enable supported LLDP and LLDP-MED functionality for the voice access port.
  4. Advertise the supported LLDP-MED network policy toward the phone.

Explanation

Correct Answer

A:

This action addresses Phone and PC passthrough. The phone can use its voice VLAN while untagged PC traffic follows the data VLAN.

Incorrect Answers

B:

That action targets Voice tag mismatch: Tagged voice frames can enter the intended voice broadcast domain instead of being discarded. It does not directly resolve the stated Phone and PC passthrough requirement.

C:

That action targets LLDP-MED discovery disabled: Voice endpoint network policies can be announced to compatible phones. It does not directly resolve the stated Phone and PC passthrough requirement.

D:

That action targets LLDP-MED network policy: The phone can discover the intended voice VLAN information from the access switch. It does not directly resolve the stated Phone and PC passthrough requirement.

Question 634

A Junos network engineer takes this step: Use the supported access-port data VLAN plus tagged voice VLAN design for the phone-PC chain. Which outcome most directly follows?

  1. Voice endpoint network policies can be announced to compatible phones.
  2. The phone can use its voice VLAN while untagged PC traffic follows the data VLAN.
  3. The phone can discover the intended voice VLAN information from the access switch.
  4. Tagged voice frames can enter the intended voice broadcast domain instead of being discarded.

Explanation

Correct Answer

B:

This is the direct result of the Phone and PC passthrough decision: The phone can use its voice VLAN while untagged PC traffic follows the data VLAN.

Incorrect Answers

A:

This outcome is associated with LLDP-MED discovery disabled (Enable supported LLDP and LLDP-MED functionality for the voice access port.), not the specified action.

C:

This outcome is associated with LLDP-MED network policy (Advertise the supported LLDP-MED network policy toward the phone.), not the specified action.

D:

This outcome is associated with Voice tag mismatch (Align the advertised and permitted voice VLAN identifier across the phone and switching port.), not the specified action.

Question 635

A desk phone sits between the wall switch and a computer; voice is tagged but the computer sends ordinary untagged traffic. A colleague instead suggests: Align the advertised and permitted voice VLAN identifier across the phone and switching port. Which corrective approach most directly addresses the original issue?

  1. Advertise the supported LLDP-MED network policy toward the phone.
  2. Align the advertised and permitted voice VLAN identifier across the phone and switching port.
  3. Use the supported access-port data VLAN plus tagged voice VLAN design for the phone-PC chain.
  4. Enable supported LLDP and LLDP-MED functionality for the voice access port.

Explanation

Correct Answer

C:

This corrective choice addresses Phone and PC passthrough. The phone can use its voice VLAN while untagged PC traffic follows the data VLAN.

Incorrect Answers

A:

That alternative applies to LLDP-MED network policy instead. The phone can discover the intended voice VLAN information from the access switch.

B:

That alternative applies to Voice tag mismatch instead. Tagged voice frames can enter the intended voice broadcast domain instead of being discarded.

D:

That alternative applies to LLDP-MED discovery disabled instead. Voice endpoint network policies can be announced to compatible phones.

Question 636

An enterprise network designer recommends: Use the supported access-port data VLAN plus tagged voice VLAN design for the phone-PC chain. Which situation most clearly calls for this action?

  1. A phone tags frames for voice VLAN 210, but the upstream switch accepts only VLAN 200 as the voice VLAN.
  2. A new IP phone should learn its designated voice VLAN and applicable network policy from the Ethernet switch automatically.
  3. An IP phone expects automatic switch voice policy but the access port has LLDP-MED advertisement disabled.
  4. A desk phone sits between the wall switch and a computer; voice is tagged but the computer sends ordinary untagged traffic.

Explanation

Correct Answer

D:

This case requires the Phone and PC passthrough action. The phone can use its voice VLAN while untagged PC traffic follows the data VLAN.

Incorrect Answers

A:

This other case would be better matched to Align the advertised and permitted voice VLAN identifier across the phone and switching port. Tagged voice frames can enter the intended voice broadcast domain instead of being discarded.

B:

This other case would be better matched to Advertise the supported LLDP-MED network policy toward the phone. The phone can discover the intended voice VLAN information from the access switch.

C:

This other case would be better matched to Enable supported LLDP and LLDP-MED functionality for the voice access port. Voice endpoint network policies can be announced to compatible phones.

Question 637

A phone is not receiving the expected voice settings and administrators need evidence of whether the switch recognizes it as a neighbor. Which Junos networking action or protocol decision best addresses this requirement?

  1. Enable supported LLDP and LLDP-MED functionality for the voice access port.
  2. Advertise the supported LLDP-MED network policy toward the phone.
  3. Configure a dedicated voice VLAN with suitable trunk or access semantics for the phone ports.
  4. Inspect LLDP neighbor detail and advertised LLDP-MED policy information.

Explanation

Correct Answer

D:

This action addresses LLDP neighbor inspection. The engineer can verify device discovery and the voice policy offered on the port.

Incorrect Answers

A:

That action targets LLDP-MED discovery disabled: Voice endpoint network policies can be announced to compatible phones. It does not directly resolve the stated LLDP neighbor inspection requirement.

B:

That action targets LLDP-MED network policy: The phone can discover the intended voice VLAN information from the access switch. It does not directly resolve the stated LLDP neighbor inspection requirement.

C:

That action targets Voice VLAN separation: Voice and data traffic can be separated into distinct VLANs on the same switching infrastructure. It does not directly resolve the stated LLDP neighbor inspection requirement.

Question 638

A Junos network engineer takes this step: Inspect LLDP neighbor detail and advertised LLDP-MED policy information. Which outcome most directly follows?

  1. The engineer can verify device discovery and the voice policy offered on the port.
  2. Voice endpoint network policies can be announced to compatible phones.
  3. Voice and data traffic can be separated into distinct VLANs on the same switching infrastructure.
  4. The phone can discover the intended voice VLAN information from the access switch.

Explanation

Correct Answer

A:

This is the direct result of the LLDP neighbor inspection decision: The engineer can verify device discovery and the voice policy offered on the port.

Incorrect Answers

B:

This outcome is associated with LLDP-MED discovery disabled (Enable supported LLDP and LLDP-MED functionality for the voice access port.), not the specified action.

C:

This outcome is associated with Voice VLAN separation (Configure a dedicated voice VLAN with suitable trunk or access semantics for the phone ports.), not the specified action.

D:

This outcome is associated with LLDP-MED network policy (Advertise the supported LLDP-MED network policy toward the phone.), not the specified action.

Question 639

A phone is not receiving the expected voice settings and administrators need evidence of whether the switch recognizes it as a neighbor. A colleague instead suggests: Enable supported LLDP and LLDP-MED functionality for the voice access port. Which corrective approach most directly addresses the original issue?

  1. Advertise the supported LLDP-MED network policy toward the phone.
  2. Inspect LLDP neighbor detail and advertised LLDP-MED policy information.
  3. Enable supported LLDP and LLDP-MED functionality for the voice access port.
  4. Configure a dedicated voice VLAN with suitable trunk or access semantics for the phone ports.

Explanation

Correct Answer

B:

This corrective choice addresses LLDP neighbor inspection. The engineer can verify device discovery and the voice policy offered on the port.

Incorrect Answers

A:

That alternative applies to LLDP-MED network policy instead. The phone can discover the intended voice VLAN information from the access switch.

C:

That alternative applies to LLDP-MED discovery disabled instead. Voice endpoint network policies can be announced to compatible phones.

D:

That alternative applies to Voice VLAN separation instead. Voice and data traffic can be separated into distinct VLANs on the same switching infrastructure.

Question 640

An enterprise network designer recommends: Inspect LLDP neighbor detail and advertised LLDP-MED policy information. Which situation most clearly calls for this action?

  1. An IP phone expects automatic switch voice policy but the access port has LLDP-MED advertisement disabled.
  2. Employee PCs and VoIP phones share an office switch but voice packets need their own logical broadcast domain.
  3. A phone is not receiving the expected voice settings and administrators need evidence of whether the switch recognizes it as a neighbor.
  4. A new IP phone should learn its designated voice VLAN and applicable network policy from the Ethernet switch automatically.

Explanation

Correct Answer

C:

This case requires the LLDP neighbor inspection action. The engineer can verify device discovery and the voice policy offered on the port.

Incorrect Answers

A:

This other case would be better matched to Enable supported LLDP and LLDP-MED functionality for the voice access port. Voice endpoint network policies can be announced to compatible phones.

B:

This other case would be better matched to Configure a dedicated voice VLAN with suitable trunk or access semantics for the phone ports. Voice and data traffic can be separated into distinct VLANs on the same switching infrastructure.

D:

This other case would be better matched to Advertise the supported LLDP-MED network policy toward the phone. The phone can discover the intended voice VLAN information from the access switch.

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