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  2. Reserved IP addresses - Wikipedia

    en.wikipedia.org/wiki/Reserved_IP_addresses

    Host Used for loopback addresses to the local host [1] 169.254.0.0/16 169.254.0.0–169.254.255.255 65 536: Subnet Used for link-local addresses [5] between two hosts on a single link when no IP address is otherwise specified, such as would have normally been retrieved from a DHCP server 172.16.0.0/12 172.16.0.0–172.31.255.255 1 048 576 ...

  3. List of TCP and UDP port numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_TCP_and_UDP_port...

    The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. [3] They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the ...

  4. TCP hole punching - Wikipedia

    en.wikipedia.org/wiki/TCP_hole_punching

    In the following, the terms host, client and peer are used almost interchangeably. local endpoint, internal endpoint the local IP:port as seen locally by the host and the internal part of the NAT. public endpoint, external endpoint the external IP:port mapped by the NAT, as seen by the network and the external part of the NAT. remote endpoint

  5. Ephemeral port - Wikipedia

    en.wikipedia.org/wiki/Ephemeral_port

    An ephemeral port is a communications endpoint of a transport layer protocol of the Internet protocol suite that is used for only a short period of time for the duration of a communication session. Such short-lived ports are allocated automatically within a predefined range of port numbers by the IP stack software of a computer operating system.

  6. Dedicated hosting service - Wikipedia

    en.wikipedia.org/wiki/Dedicated_hosting_service

    A dedicated hosting service, dedicated server, or managed hosting service is a type of Internet hosting in which the client leases an entire server not shared with anyone else. This is more flexible than shared hosting , as organizations have full control over the server(s), including choice of operating system , hardware , etc.

  7. Fix sending and receiving issues with third-party email apps

    help.aol.com/articles/cant-send-or-receive-email...

    If your account is working on a web browser and you made sure you're using the right server settings, then update your email app to the newest version available. If you're still experiencing issues with your app, contact the manufacturer. Also, access your AOL Mail on a web browser. Keep in mind - For two-step verification, generate an app ...

  8. Server Name Indication - Wikipedia

    en.wikipedia.org/wiki/Server_Name_Indication

    Server Name Indication (SNI) is an extension to the Transport Layer Security (TLS) computer networking protocol by which a client indicates which hostname it is attempting to connect to at the start of the handshaking process. [1]

  9. A cheeky little slice of cake here, a cookie there, or a nibble of chocolate every once in a while isn't the worst thing in the world. But according to new research, the buck stops at sugary drinks.