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350-701 Practice Question: Refer to the exhibit

Exhibit

interface GigabitEthernet0/0
 nameif inside
 security-level 100
 ip address 10.0.0.1 255.255.255.0
!
interface GigabitEthernet0/1
 nameif outside
 security-level 0
 ip address 192.168.1.1 255.255.255.0
!
access-list INSIDE_NAT extended permit ip 10.0.0.0 0.0.0.255 192.168.3.0 0.0.0.255
nat (inside,outside) source dynamic 10.0.0.0 255.255.255.0 interface

Refer to the exhibit. A host with IP address 10.0.0.5 sends traffic to destination 192.168.2.10. The traffic is not being translated. What is the most likely cause?

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

The ACL INSIDE_NAT does not permit traffic to the destination network 192.168.2.0/24.

The access-list INSIDE_NAT permits traffic to network 192.168.3.0/24, but the destination is 192.168.2.10, which is not matched. Therefore, NAT is not applied to that traffic. Option B is correct. Options A, C, and D are not relevant because dynamic NAT is allowed, outside interface has an IP, and security-level does not affect NAT.

Answer analysis

Option-by-option breakdown

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

  • The security-level of the inside interface is too high to allow NAT.

    Why it's wrong here

    Security-level does not impact NAT functionality.

  • The ACL INSIDE_NAT does not permit traffic to the destination network 192.168.2.0/24.

    Why this is correct

    The ACL only permits traffic to 192.168.3.0/24, so 192.168.2.0/24 traffic is not matched and hence not translated.

  • The interface outside does not have a valid IP address assigned.

    Why it's wrong here

    The outside interface has IP 192.168.1.1, which is valid.

  • The NAT statement uses source dynamic instead of source static; dynamic cannot translate internal IPs.

    Why it's wrong here

    Dynamic NAT is commonly used for internal-to-external translation; static is not required.

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

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JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

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