Question 126 of 988
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350-701 Network Security Practice Question

This 350-701 practice question tests your understanding of network security. 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.

A Cisco ASA is configured with dynamic PAT to translate internal addresses to a single outside IP address. A user on the inside initiates a connection to an external web server. The ASA creates a connection entry. Which table is checked first when a return packet arrives from the web server?

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.

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

Connection table (conn)

The ASA checks the connection table (conn table) first for stateful inspection. The xlate table is used for NAT translation, but connection table is checked for session state.

Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

Answer analysis

Option-by-option breakdown

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

  • ACL table

    Why it's wrong here

    ACLs are checked for new connections, not for established ones.

  • Connection table (conn)

    Why this is correct

    Correct. The ASA checks the connection table to see if the packet belongs to an existing session.

    Clue confirmation

    The clue word "first" in the question point toward this answer.

    Related concept

    Static NAT maps one inside address to one outside address.

  • NAT table (xlate)

    Why it's wrong here

    The xlate table is used for NAT, but the connection table is checked first for state.

  • Routing table

    Why it's wrong here

    Routing is checked after connection lookup.

Common exam traps

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.

Detailed technical explanation

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.

Key takeaway

NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

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.

Visual reference

Inside (Private) PC-A 10.0.0.1 PC-B 10.0.0.2 NAT Router Outside (Public) 203.0.113.1 Inside Global Server PAT: many private IPs share one public IP via unique port numbers

What to study next

Got this wrong? Here's your next step.

Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 350-701 NAT questions on configuration and troubleshooting.

Related practice questions

Related 350-701 practice-question pages

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FAQ

Questions learners often ask

What does this 350-701 question test?

Network Security — This question tests Network Security — Static NAT maps one inside address to one outside address..

What is the correct answer to this question?

The correct answer is: Connection table (conn) — The ASA checks the connection table (conn table) first for stateful inspection. The xlate table is used for NAT translation, but connection table is checked for session state.

What should I do if I get this 350-701 question wrong?

Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 350-701 NAT questions on configuration and troubleshooting.

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?

Static NAT maps one inside address to one outside address.

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Last reviewed: Jul 4, 2026

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