ネットワーク事業部 コアネットワークグループ所属の市川です。普段は、広域ネットワークの管理をしていて、端末に向かっていても頭の中は、1都3県を飛び回っています。 好きなポートは何番ですか？ 入社後エンジニア部隊に配属され、隣に座っていた同僚に挨拶をした時の返しの第一声が忘れられません。 「好きなポートは何番ですか？」 これって自己紹介なのでしょうか...それとも好きなポート番号から僕の性格が分かっちゃったりするんでしょうか？ところで、みなさんの好きなポートは何番でしょうか？ちなみにボクは、23番が好きでした（笑）。さて、私は現在ネットワーク事業部でネットワーク管理の仕事をしております。ネットワークにトラブルが発生した場合、状況調査に利用するツールでもっともメジャーな物に、ping/traceroute（windowsではtracert.exe）があります。 このtracerouteの仕組み
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