Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
Exhibit
Host 192.0.2.45 arp -a Internet Address Physical Address Type 192.0.2.1 00-50-56-a1-b2-c3 dynamic 192.0.2.1 00-50-56-a1-b2-c4 dynamic Packet capture: 10:14:02 ARP Reply: 192.0.2.1 is-at 00:50:56:a1:b2:c4 10:14:03 ARP Reply: 192.0.2.1 is-at 00:50:56:a1:b2:c4 10:14:05 Gateway traffic is briefly forwarded to 192.0.2.200 Switch CAM table: Gi1/0/7 00:50:56:a1:b2:c4 Gi1/0/24 00:50:56:a1:b2:c4
Based on the exhibit, which attack is most likely occurring on the local network?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
DNS cache poisoning
DNS poisoning targets name resolution records, not Ethernet-layer ARP mappings on a local subnet.
B
Best answer
ARP spoofing
The host receives repeated ARP replies claiming the gateway IP belongs to a different MAC address, and the same MAC appears on multiple switch ports. That combination indicates ARP spoofing or poisoning, which can redirect traffic through an attacker for interception or disruption. The brief forwarding to another IP is consistent with a man-in-the-middle attempt built on forged ARP replies.
C
Distractor review
Replay attack
Replay attacks reuse captured valid messages, typically in authentication or protocol exchanges, rather than altering ARP ownership mappings.
D
Distractor review
Amplification denial-of-service
Amplification uses small requests to trigger much larger responses, usually in distributed volumetric flooding attacks.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A laptop is suspected of being used in a malware incident. It is still powered on and connected to Wi-Fi. What should the responder do before shutting it down?
Question 2
An employee reports a ransomware note on a file server. The server is still powered on, shares are still being accessed, and management wants service restored as quickly as possible. What should the incident response team do first?
Question 3
An employee reports a ransomware note on a finance laptop. The laptop is still powered on, connected to Wi-Fi, and the user says they were just working in a spreadsheet. Management wants the fastest safe response that also preserves evidence. What should the responder do first?
Question 4
You are handed a company laptop suspected in an insider theft case. Legal says the evidence may be needed in court. Which action best preserves admissibility?
Question 5
A developer wants to reduce the risk of SQL injection in a new customer search form. Which two changes are the best mitigations? Select two.
Question 6
A branch office uses a flat LAN, and a compromise on one user workstation could spread quickly to finance systems. Management wants finance workstations isolated from general users, but finance staff still need access to a central finance application and network printer. What is the best design change?
FAQ
Questions learners often ask
What does this SY0-701 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: ARP spoofing — The exhibit shows unsolicited ARP replies that reassign the gateway IP to a different MAC address, plus the same MAC appearing on more than one switch port. That is the classic pattern of ARP spoofing, also called ARP poisoning. The attacker tries to poison the cache so traffic destined for the gateway is redirected to the attacker or to a malicious relay host, enabling interception, tampering, or disruption. Why others are wrong: DNS cache poisoning affects DNS records, not ARP tables. Replay attacks reuse captured messages but do not explain gateway MAC confusion at layer 2. Amplification denial-of-service would show many request/response packets and bandwidth flooding, not forged ARP replies or a MAC address suddenly associated with the gateway.
What should I do if I get this SY0-701 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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