Network Address Translation Questions and Answers

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Showing 10 of 43 questions
Q21
What does overloaded NAT refer to?
  • A Dynamic NAT
  • B PAT
  • C Static NAT
  • D Double NAT
Answer: Option B
Explanation: Overloaded NAT is another name for PAT.
Q22
Dynamic NAT requires which component to work?
  • A ARP table
  • B Pool of public IP addresses
  • C DNS records
  • D RIP routing table
Answer: Option B
Explanation: Dynamic NAT maps private IPs to available public IPs from a pool.
Q23
Which NAT method is most commonly used in home routers?
  • A Static NAT
  • B Dynamic NAT
  • C PAT
  • D RNAT
Answer: Option C
Explanation: Home routers use PAT to allow many devices to share one public IP.
Q24
Which table maintains private-to-public mapping in NAT?
  • A FIB
  • B Translation table
  • C DNS table
  • D Static route table
Answer: Option B
Explanation: NAT uses a translation table to keep mapping information.
Q25
Which protocol may fail with NAT unless additional support is used?
  • A HTTP
  • B FTP (Active mode)
  • C SMTP
  • D POP3
Answer: Option B
Explanation: Active FTP embeds IP in the payload, requiring ALG or passive mode.
Q26
Which term refers to translating destination IP address?
  • A SNAT
  • B DNAT
  • C PAT
  • D Private NAT
Answer: Option B
Explanation: DNAT modifies the destination IP, used in port forwarding.
Q27
Which NAT type supports port forwarding?
  • A Static NAT
  • B PAT
  • C DNAT
  • D Dynamic NAT
Answer: Option C
Explanation: Port forwarding uses DNAT to forward packets to internal hosts.
Q28
Private IP addresses behind NAT usually belong to which range?
  • A 5.0.0.0/8
  • B 172.16.0.0 - 172.31.255.255
  • C 100.64.0.0/10
  • D 200.0.0.0/8
Answer: Option B
Explanation: This is one of the RFC-1918 private IP ranges.
Q29
Which NAT feature helps conserve public IPv4 addresses?
  • A Static NAT
  • B PAT
  • C DNAT
  • D Reverse NAT
Answer: Option B
Explanation: PAT enables many internal hosts to use a single public IP.
Q30
Double NAT occurs when:
  • A Two NAT devices operate sequentially
  • B Static NAT is misconfigured
  • C Two ISPs are used
  • D DNS fails
Answer: Option A
Explanation: Double NAT means two layers of NAT translation exist.

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