ウ ポート番号 同じサーバでも、メールとWebでは別のサービスです。サーバは、ポート番号によって「どのサービスを使いたいのか」を区別します。例えば、Webサイトを見るときはポート番号80(HTTP)や443(HTTPS)を使います。一方、メールではSMTP(25番)、POP3(110番)、IMAP(143番)などの別のポート番号を使います。このように、ポート番号によって、Webなのかメールなのかをサーバが判断します。 Even on the same server, email and web are different services. The server uses port numbers to distinguish which service the client wants to use. For example, when accessing a website, port number 80 (HTTP) or 443 (HTTPS) is used. On the other hand, email uses different port numbers such as SMTP (25), POP3 (110), and IMAP (143). In this way, the server determines whether the request is for web or email based on the port number.
I am an explorer who ventures across the digital sea in search of gastronomic treasures. In the world of technology, I traverse the sea of keyboards in search of new discoveries. And in the real world, I visit every nook and cranny to find a delicious restaurant worth tantalizing your taste buds.
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