顧客は、インターネット宛てのトラフィックを変換する ISP ルーターにファイアウォールを接続します。顧客はインターネットには接続できますが、リモート サイトには接続できません。NAT のステータスを確認するのは次のうちどれですか?
正解:A
Explanation
tcpdump is a command-line tool that can capture and analyze network traffic on a given interface. tcpdump can verify the status of NAT by showing the source and destination IP addresses of the packets before and after they pass through the ISP router that translates traffic destined for the internet. tcpdump can also show the NAT protocol and port numbers used by the router. nmap, ipconfig, and tracert are not suitable tools for verifying the status of NAT, as they do not show the IP address translation process.
References
1: Network Address Translation - N10-008 CompTIA Network+ : 1.4
2: CompTIA Network+ N10-008 Certification Study Guide, page 95-96
3: CompTIA Network+ N10-008 Exam Subnetting Quiz, question 16
4: CompTIA Network+ N10-008 Certification Practice Test, question 7