Question 1,319 of 2,015

Virtual Machines and Hypervisors →mediumDrag & DropObjective-mapped

Quick Answer

The answer is to test connectivity to the external network as the final step. This order is correct because Docker’s default bridge network is created automatically, then containers are attached to it and assigned private IPs via DHCP, after which internal communication between containers is possible. The last step, testing external connectivity, verifies that Network Address Translation (NAT) is functioning through the host’s iptables rules, which masquerade container traffic to the outside world. On the ENCOR 350-401 exam, this drag-and-drop task tests your understanding of container networking fundamentals, often appearing alongside questions about overlay networks or host-mode drivers. A common trap is placing IP assignment after external connectivity, but remember that containers must have an IP before they can route traffic. A useful memory tip is “Bridge, Attach, IP, Test”—or simply “B.A.I.T.”—to lock in the sequence from local creation to external validation.

350-401 Virtual Machines and Hypervisors Practice Question

This 350-401 practice question tests your understanding of virtual machines and hypervisors. 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.

Drag and drop the steps of Docker container networking with bridge mode into the correct order, from first to last.

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

Question 1mediumdrag order

Full question →

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

✓

Create default bridge network on host

The order reflects the default bridge network creation, container attachment, IP assignment, and then communication with the outside world via NAT.

Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.

Common exam traps

Common exam trap: usable hosts are not the same as total addresses

Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.

Detailed technical explanation

How to think about this question

Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.

KKey Concepts to Remember

CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.

TExam Day Tips

Write the block size before choosing the subnet.
Check whether the question asks for hosts, subnets or a specific address range.
Do not confuse /24, /25, /26 and /27 host counts.

Key takeaway

Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.

Real-world example

How this comes up in practice

A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.

What to study next

Got this wrong? Here's your next step.

Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related 350-401 subnetting questions on CIDR, address ranges, and subnet selection.

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FAQ

Questions learners often ask

What does this 350-401 question test?

Virtual Machines and Hypervisors — This question tests Virtual Machines and Hypervisors — CIDR notation defines the prefix length..

What is the correct answer to this question?

The correct answer is: Create default bridge network on host — The order reflects the default bridge network creation, container attachment, IP assignment, and then communication with the outside world via NAT.

What should I do if I get this 350-401 question wrong?

Are there clue words in this question I should notice?

Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

What is the key concept behind this question?

CIDR notation defines the prefix length.

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Last reviewed: Jun 18, 2026

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