IP Telephony Features

An administrator implements LLDP-MED on an EX Series switch network. To prevent unauthorized devices from masquerading as IP phones and requesting voice VLAN access, which feature should be combined with LLDP-MED?

When configuring voice VLANs and PoE on an EX Series switch, which THREE benefits are achieved by implementing LLDP-MED alongside standard PoE? (Choose three.)

You are troubleshooting an IP phone that is failing to discover its voice VLAN via LLDP-MED on an EX4600 switch. You issue the show lldp interface command and see that LLDP is transmitting properly, but the phone reports no voice VLAN TLV received. What is the most likely cause of this issue?

A network administrator needs to verify the PoE status, power draw, and allocated class for all connected IP phones across all interfaces on an EX2300 switch. Which operational command should be used?

An administrator configures PoE management mode on an EX4300 switch to 'consumption'. An IP phone connects, but before booting up completely, the switch denies power. Upon investigation, you find that the switch's static power reservation table is maxed out. What is the reason for this behavior in consumption mode?

You are configuring an EX Series switch to support IP phones that require both data and voice VLAN segregation on a single access port. You implement an access port configured with a voice VLAN. Which underlying Junos mechanism allows the switch to process untagged data traffic into the native/access VLAN and tagged voice traffic into the voice VLAN simultaneously?

Which LLDP TLV (Type-Length-Value) is mandatory for LLDP-MED operation and is used to distinguish media endpoint devices from standard network switches and routers?

What does the LLDP-MED acronym stand for in the context of enterprise networking and IP telephony?

Which THREE requirements must be met for an IP phone to successfully discover and use a voice VLAN configured via LLDP-MED on an EX Series switch? (Choose three)

When deploying IP phones that utilize a voice VLAN on EX Series access ports, which THREE characteristics or configurations typically apply to this design? (Choose three.)

You are deploying IP phones on an EX4300 switch. The phones require PoE+ (802.3at) and must be allocated power based on their actual consumption rather than a fixed class. Which PoE management mode should you configure on the switch?

An administrator needs to configure PoE power management on an EX3400 switch to prioritize port ge-0/0/0 for a critical emergency IP phone. Which statement correctly describes the default PoE priority behavior on Junos EX switches if no explicit priority is configured?

You are troubleshooting a power budget shortfall on an EX4300 switch where multiple PoE devices are failing to power up. Which TWO actions can you take to resolve or mitigate this power deficit? (Choose two.)

An administrator is troubleshooting a Juniper EX Series switch where an IP phone connected to ge-0/0/10 is not receiving PoE power. The switch is an EX4300 with PoE+ capable ports. The administrator runs 'show poe interface ge-0/0/10' and sees 'Status: Disabled'. The interface is administratively up and LLDP is operational. What is the most likely cause?

Which THREE parameters are typically included in an LLDP-MED network policy TLV for voice application? (Choose three.)

When configuring Power over Ethernet (PoE) on an EX Series switch, which THREE parameters can be explicitly managed or configured per interface? (Choose three)

You are configuring an EX Series switch to support IP phones that use LLDP-MED for network policy. Which two statements are true about LLDP-MED network policy TLVs? (Choose two.)

Which THREE statements describe the behavior of LLDP-MED capability on Junos EX Series switches? (Choose three.)

You notice that an EX4300 switch power budget calculation is set to use 'class-based' allocation. What does this mean regarding how power is reserved for connected IP phones?

An IP phone connected to an EX4600 switch fails to power up. You run show poe interface ge-0/0/1 and find the status displays 'Hardware error'. What is the most appropriate troubleshooting step?

You administer an EX4300 switch that connects to a third-party IP phone which relies on LLDP-MED to learn its voice VLAN and DSCP marking. The phone boots and registers, but call audio is marked best-effort and the phone places itself in the native data VLAN. You confirm the phone's LLDP-MED stack is enabled. On the switch interface you issued 'set protocols lldp-med interface ge-0/0/12.0' and committed, yet the phone still receives no network policy. Which configuration element must you add to deliver the voice parameters?

You are configuring a voice VLAN on an EX2300 switch. The IP phones support LLDP-MED and must automatically obtain the voice VLAN ID. You want to ensure that the switch advertises the voice VLAN to the phones. Which configuration step is required on the access interface?

An EX4300 switch is configured with PoE management mode 'class' on all access ports. A new IP phone that advertises LLDP-MED power requirements is connected, but the phone powers on and then immediately reboots in a loop. The switch logs show the interface powering the port, then dropping power shortly after. Which action is most likely to resolve the phone boot loop?