NSE7 Advanced Networking and SD-WAN Practice Question
This NSE7 practice question tests your understanding of advanced networking and sd-wan. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 administrator wants to ensure that all traffic from a specific LAN subnet (192.168.10.0/24) to the internet uses a particular WAN interface (wan1) in an SD-WAN setup, while other traffic uses wan2. What is the correct configuration to achieve this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure an SD-WAN rule with source address matching 192.168.10.0/24 and set the preferred member to wan1
SD-WAN rules are used to match traffic based on criteria and direct it to specific members. The rule would match source 192.168.10.0/24 and set the destination interface to wan1.
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.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Create a policy-based routing rule with source 192.168.10.0/24 and set outgoing interface to wan1
Why it's wrong here
Policy-based routing works with firewall policies, but SD-WAN uses SD-WAN rules.
✓
Configure an SD-WAN rule with source address matching 192.168.10.0/24 and set the preferred member to wan1
Why this is correct
SD-WAN rules allow source-based matching and preferred member selection.
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 NSE7 subnetting questions on CIDR, address ranges, and subnet selection.
Advanced Networking and SD-WAN — This question tests Advanced Networking and SD-WAN — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Configure an SD-WAN rule with source address matching 192.168.10.0/24 and set the preferred member to wan1 — SD-WAN rules are used to match traffic based on criteria and direct it to specific members. The rule would match source 192.168.10.0/24 and set the destination interface to wan1.
What should I do if I get this NSE7 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related NSE7 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Question Discussion
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