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200-101 · Question #166

Which two statements about static NAT translations are true? (Choose two.)

The correct answer is A. They allow connections to be initiated from the outside. C. They are always present in the NAT table.. Static NAT entries are permanently installed in the NAT table and allow outside hosts to initiate sessions because the inside-to-outside mapping is always available.

Implement Wide-Area Networks

Question

Which two statements about static NAT translations are true? (Choose two.)

Exhibits

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Options

  • AThey allow connections to be initiated from the outside.
  • BThey require no inside or outside interface markings because addresses are statically defined.
  • CThey are always present in the NAT table.
  • DThey can be configured with access lists, to allow two or more connections to be initiated from the outside.

How the community answered

(26 responses)
  • A
    88% (23)
  • B
    8% (2)
  • D
    4% (1)

Why each option

Static NAT entries are permanently installed in the NAT table and allow outside hosts to initiate sessions because the inside-to-outside mapping is always available.

AThey allow connections to be initiated from the outside.Correct

Because static NAT creates a fixed, bidirectional mapping between an inside local and an inside global address, external hosts can always resolve and initiate a connection to the inside host using the registered global address, unlike dynamic NAT which only maps addresses on demand.

BThey require no inside or outside interface markings because addresses are statically defined.

Static NAT still requires interfaces to be marked with 'ip nat inside' and 'ip nat outside' so the router knows in which direction to apply the translation.

CThey are always present in the NAT table.Correct

Static NAT translations are configured manually and remain in the NAT table indefinitely - they do not time out or get removed when sessions end, distinguishing them from dynamic NAT entries which are created and removed as needed.

DThey can be configured with access lists, to allow two or more connections to be initiated from the outside.

Static NAT does not use access lists; access lists are associated with dynamic NAT and PAT to define which inside addresses are eligible for translation.

Concept tested: Static NAT translation properties and behavior

Source: https://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/13772-12.html

Topics

#static NAT#NAT table#inbound connections#NAT behavior

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