CCNA IP Telephony Features Questions

Which THREE statements are true regarding voice VLAN technologies and implementation on Junos EX Series switches? (Choose three.)

Which command displays the global status, TLV counters, and operational state of LLDP on an EX Series switch?

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 reviewing syslog messages on an EX Series switch and see frequent entries indicating PoE power budgeting warnings. You want to configure a custom trap/syslog threshold so that warnings trigger when the total power consumption exceeds 85% of the total available PoE budget. How is this configured?

An administrator notices that an EX4300 switch is supplying power using LLDP-MED power negotiation, but the IP phone is drawing more power than the initial hardware class allows. Where would you check the advertised LLDP-MED TLV power value received from the phone?

Which command allows you to verify the real-time PoE power consumption, allocated wattage, and operational status of all interfaces on an EX Series switch?

An EX3400 switch experiences a total PoE power budget exhaustion after multiple high-power IP phones and security cameras are plugged in. You want to ensure that if a power deficit occurs, the switch immediately cuts power to lower-priority ports while maintaining power to executive phones on specific ports. How should you configure this?

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?

You are configuring a voice VLAN on an EX Series switch access port where an IP phone is connected in series with a PC. Which configuration is required on the switch interface to handle both tagged voice traffic and untagged data traffic?

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?

An EX4300 switch running Junos OS supports multiple PoE power management options. Which THREE PoE management modes or settings are valid in Junos configuration? (Choose three.)

An administrator is configuring LLDP-MED on an EX Series switch for a new deployment of IP phones. Which TWO configuration steps are required to properly advertise network policies to these endpoints? (Choose two.)

You are configuring Power over Ethernet (PoE) on an EX4300 switch to power an IP phone requiring 15.4W (802.3af). By default, the switch allocates power based on dynamic classification. However, the IP phone frequently reboots under heavy traffic load. Which command should you configure on the switch interface to ensure the phone receives a guaranteed dedicated power budget?

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

You want to configure LLDP-MED to advertise a specific voice VLAN (VLAN ID 200) with a DSCP value of 46 to all connected IP phones across all switch ports. Which configuration hierarchy is used to define this global network policy in Junos OS?

You need to configure an LLDP-MED network policy for voice traffic on an EX switch, ensuring that the DSCP value is set to 46 and the VLAN ID is set to 150. Which configuration achieves this?

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.)

An administrator needs to enable LLDP globally on an EX Series switch running Junos OS to support IP phones. Which command accomplishes this task?

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.)

Which Junos command displays the LLDP neighbor information specifically for a single interface, such as ge-0/0/1?

You are configuring an EX3400 switch to support IP phones that require power redundancy. Which PoE management feature allows the switch to allocate power based on available PSU capacity while reserving a safety margin?

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)

An EX4300 switch is experiencing a PoE budget shortage, causing newly connected IP phones to be denied power. You need to change the PoE power management mode from the default to dynamic consumption-based allocation rather than static class-based allocation. Which command achieves this?

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 administrator wants to verify LLDP and LLDP-MED operation on an EX Series switch. Which THREE operational commands provide relevant diagnostic information? (Choose three.)

Which TWO actions occur by default on a Junos EX Series switch port when an IP phone successfully negotiates its voice VLAN using LLDP-MED? (Choose two)

You are configuring voice VLANs on an EX2300 switch. You want to ensure that untagged frames entering the interface are placed into the data VLAN, while frames generated by the attached IP phone are tagged with VLAN 50. Which CLI configuration snippet correctly achieves this?

You are deploying a new IP telephony network on an EX4300 switch. The voice VLAN must be automatically communicated to connected IP phones using LLDP-MED. Which configuration parameter under system services lldp med fast-start-repeat-count must you configure to ensure rapid initial device discovery?

You are troubleshooting voice quality issues on an IP phone connected to an EX Series switch. You suspect that the switch is not trusting the DSCP markings (DSCP 46) sent by the IP phone. Which Junos class-of-service (CoS) configuration ensures that incoming voice traffic DSCP bits are trusted at the ingress interface?

An IP phone connected to an EX4300 switch is assigned to voice VLAN 50 via LLDP-MED. However, when a PC is plugged into the IP phone's pass-through port, the PC cannot obtain an IP address via DHCP. The switch port is configured with interface-mode access and a native VLAN for data. What is the most likely root cause?

An enterprise network uses IP phones that require LLDP-MED to receive voice VLAN information. However, security policy dictates that LLDP should be disabled on all user-facing access ports that do not have IP phones. Which configuration statement disables LLDP on a per-interface basis?

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?

Which THREE conditions must be met for an EX Series switch to successfully supply PoE power to an attached IP phone? (Choose three.)

You are troubleshooting an IP phone that is failing to learn its assigned voice VLAN via LLDP-MED from an EX4600 switch. You run show lldp interface ge-0/0/5 and verify LLDP is active. However, the phone's voice VLAN ID TLV is missing from the neighbor information. Which configuration command under the interface must be verified to ensure voice VLAN advertisements are properly transmitted?

Which command is used to view LLDP-MED specific neighbor details, including device type, capabilities, and network policies on an EX Series switch?

An administrator notices that LLDP neighbors are failing to populate on an EX Series switch interface. Which THREE troubleshooting steps should be performed? (Choose three.)

What is the default behavior of an EX Series switch when an LLDP-MED capable IP phone connects and requests a network policy for voice VLAN?