Network Address Translation Questions and Answers
Network Address Translation (NAT) is a critical networking concept widely used in routers and firewalls to manage IP address mapping between private and public networks. This section features networking interview questions and answers that focus on NAT configuration, benefits, and real-world scenarios. Whether preparing for Cisco CCNA, Infosys, HCL, or other IT placements, understanding NAT concepts is key to clearing both technical and HR rounds. The questions cover static, dynamic, and PAT mechanisms with practical examples. Strengthen your networking knowledge with detailed placement papers with answers, ideal for students and professionals aiming to excel in networking roles.
Network Address Translation
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43 questions
22. Dynamic NAT requires which component to work?
- ARP table
- Pool of public IP addresses
- DNS records
- RIP routing table
23. Which NAT method is most commonly used in home routers?
- Static NAT
- Dynamic NAT
- PAT
- RNAT
24. Which table maintains private-to-public mapping in NAT?
- FIB
- Translation table
- DNS table
- Static route table
25. Which protocol may fail with NAT unless additional support is used?
- HTTP
- FTP (Active mode)
- SMTP
- POP3
26. Which term refers to translating destination IP address?
- SNAT
- DNAT
- PAT
- Private NAT
28. Private IP addresses behind NAT usually belong to which range?
- 5.0.0.0/8
- 172.16.0.0 - 172.31.255.255
- 100.64.0.0/10
- 200.0.0.0/8
29. Which NAT feature helps conserve public IPv4 addresses?
- Static NAT
- PAT
- DNAT
- Reverse NAT
30. Double NAT occurs when:
- Two NAT devices operate sequentially
- Static NAT is misconfigured
- Two ISPs are used
- DNS fails