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Implementing Hybrid Interconnectivity →hardMultiple SelectObjective-mapped

PCNE Implementing Hybrid Interconnectivity Practice Question

This PCNE practice question tests your understanding of implementing hybrid interconnectivity. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

An organization is setting up a Dedicated Interconnect and wants to monitor the health and performance of the connection using Cloud Monitoring. Which THREE metrics are available for Dedicated Interconnect?

A
interconnect/network/received_bytes_count
This metric tracks bytes received over the interconnect.
B
interconnect/link/packet_loss
Packet loss is a key performance metric.
C
interconnect/link/operational_status
This metric indicates whether the link is up or down.
D
interconnect/network/traffic_drops
Why wrong: Not a standard interconnect metric.
E
interconnect/vpn/tunnel_status
Why wrong: This is a VPN metric, not interconnect.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

interconnect/network/received_bytes_count

Cloud Monitoring provides several metrics for Dedicated Interconnect, including traffic volume (received_bytes_count), link operational status, and packet loss. VLAN attachment metrics are also available, but the question asks for interconnect metrics.

Key principle: A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
interconnect/network/received_bytes_count
Why this is correct
This metric tracks bytes received over the interconnect.
Related concept
Access ports place end devices into a single VLAN.
✓
interconnect/link/packet_loss
Why this is correct
Packet loss is a key performance metric.
Related concept
Access ports place end devices into a single VLAN.
✓
interconnect/link/operational_status
Why this is correct
This metric indicates whether the link is up or down.
Related concept
Access ports place end devices into a single VLAN.
✗
interconnect/network/traffic_drops
Why it's wrong here
Not a standard interconnect metric.
✗
interconnect/vpn/tunnel_status
Why it's wrong here
This is a VPN metric, not interconnect.

Common exam traps

Common exam trap: an active trunk can still block the VLAN you need

A trunk being up does not prove every VLAN is crossing it. Check allowed VLAN lists, native VLAN mismatch, VLAN existence and access-port assignment.

Detailed technical explanation

How to think about this question

VLAN questions usually combine access-port and trunking clues. The key is to identify whether the issue is local to one switchport, caused by the trunk, or caused by the VLAN not existing where it needs to exist.

KKey Concepts to Remember

Access ports place end devices into a single VLAN.
Trunk ports carry multiple VLANs between switches.
Allowed VLAN lists decide which VLANs can cross a trunk.
Native VLAN mismatch can create confusing symptoms.

TExam Day Tips

Use show vlan brief to verify access VLANs.
Use show interfaces trunk to verify trunk state and allowed VLANs.
Do not treat every same-VLAN issue as a routing problem.

Key takeaway

A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.

Real-world example

How this comes up in practice

A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.

Visual reference

What to study next

Got this wrong? Here's your next step.

Review VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related PCNE questions on switching, trunking, and access-port configuration.

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FAQ

Questions learners often ask

What does this PCNE question test?

Implementing Hybrid Interconnectivity — This question tests Implementing Hybrid Interconnectivity — Access ports place end devices into a single VLAN..

What is the correct answer to this question?

The correct answer is: interconnect/network/received_bytes_count — Cloud Monitoring provides several metrics for Dedicated Interconnect, including traffic volume (received_bytes_count), link operational status, and packet loss. VLAN attachment metrics are also available, but the question asks for interconnect metrics.

What should I do if I get this PCNE question wrong?

What is the key concept behind this question?

Access ports place end devices into a single VLAN.

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