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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    Unless otherwise stated, the status code is part of the HTTP standard. [1] The Internet Assigned Numbers Authority (IANA) maintains the official registry of HTTP status codes. [2] All HTTP response status codes are separated into five classes or categories. The first digit of the status code defines the class of response, while the last two ...

  3. WebSocket - Wikipedia

    en.wikipedia.org/wiki/WebSocket

    The client sends an HTTP request (method GET, version ≥ 1.1) and the server returns an HTTP response with status code 101 (Switching Protocols) on success. This means a WebSocket server can use the same port as HTTP (80) and HTTPS (443) because the handshake is compatible with HTTP.

  4. List of IP protocol numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_IP_protocol_numbers

    101 IFMP Ipsilon Flow Management Protocol: 0x66 102 PNNI PNNI over IP: 0x67 103 PIM Protocol Independent Multicast: 0x68 104 ARIS IBM's ARIS (Aggregate Route IP Switching) Protocol 0x69 105 SCPS SCPS (Space Communications Protocol Standards) SCPS-TP [4] 0x6A 106 QNX: QNX 0x6B 107 A/N Active Networks 0x6C 108 IPComp IP Payload Compression ...

  5. SF Express - Wikipedia

    en.wikipedia.org/wiki/SF_Express

    It is the largest courier in China, [3] and provides domestic and international express delivery. SF Express has a fleet of 69 cargo aircraft, including 37 Boeing 757 , 17 Boeing 737 , 13 Boeing 767 and two Boeing 747 all-cargo freighters, which are owned by its subsidiary SF Airlines .

  6. TNT Express - Wikipedia

    en.wikipedia.org/wiki/TNT_Express

    TNT offered road and air delivery services in Europe, the Asia Pacific region, the Americas, the Middle East, and Africa. In June 2014, TNT conducted a rail freight trial assessing improving support to businesses in the United Kingdom, and cutting carbon emissions.

  7. Find delivery delays or identify the sender in AOL Mail

    help.aol.com/articles/use-full-headers-to-find...

    Delivery records in the full headers show when each computer received the message. The first delivery is at the bottom; the newest at the top. If you find a large time gap between delivery records, that shows which computer delayed before sending it to the next computer. 1. View the full header by following the steps above. 2.

  8. HTTP/1.1 Upgrade header - Wikipedia

    en.wikipedia.org/wiki/HTTP/1.1_Upgrade_header

    One use is to begin a request on the normal HTTP port but switch to Transport Layer Security (TLS). [1] In practice such use is rare, with HTTPS being a far more common way to initiate encrypted HTTP. The server returns a 426 status code to alert legacy clients that the failure was client-related (400 level codes indicate a client failure).

  9. Why did I receive an email from MAILER-DAEMON? - AOL Help

    help.aol.com/articles/what-is-a-mailer-daemon...

    The most common reason for a failed delivery is that the email address entered isn't valid. If the delivery failure message says the account doesn't exist double check the spelling of the address you entered. A single misplaced letter could cause a delivery failure.