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  2. ping (networking utility) - Wikipedia

    en.wikipedia.org/wiki/Ping_(networking_utility)

    Most Linux systems use a unique Identifier for every ping process, and Sequence Number is an increasing number within that process. Windows uses a fixed Identifier, which varies between Windows versions, and a Sequence Number that is only reset at boot time. The Echo Reply is returned as:

  3. Precision Time Protocol - Wikipedia

    en.wikipedia.org/wiki/Precision_Time_Protocol

    A source is called a leader, a.k.a. master, and a destination is called a follower, a.k.a. slave. A boundary clock has multiple network connections and synchronizes one network segment to another. A single, synchronization leader is selected, a.k.a. elected, for each network segment. The root timing reference is called the grandmaster. [6]

  4. Port (computer networking) - Wikipedia

    en.wikipedia.org/wiki/Port_(computer_networking)

    In computer networking, a port or port number is a number assigned to uniquely identify a connection endpoint and to direct data to a specific service. At the software level, within an operating system , a port is a logical construct that identifies a specific process or a type of network service .

  5. Simple Network Management Protocol - Wikipedia

    en.wikipedia.org/wiki/Simple_Network_Management...

    MIBs describe the structure of the management data of a device subsystem; they use a hierarchical namespace containing object identifiers (OID). Each OID identifies a variable that can be read or set via SNMP. MIBs use the notation defined by Structure of Management Information Version 2.0 (SMIv2, RFC 2578), a subset of ASN.1.

  6. Internet Control Message Protocol - Wikipedia

    en.wikipedia.org/wiki/Internet_Control_Message...

    The ICMP header starts after the IPv4 header and is identified by its protocol number, 1. [6] All ICMP packets have an eight-byte header and variable-sized data section. The first four bytes of the header have fixed format, while the last four bytes depend on the type and code of the ICMP packet.

  7. Internet protocol suite - Wikipedia

    en.wikipedia.org/wiki/Internet_protocol_suite

    At the transport layer the communication appears as process-to-process communication, [6] each process addressed by a port number, without knowledge of the application data structures and the connecting routers. Finally, at the internetworking layer using the Internet Protocol (IP), packets of bytes traverse individual network boundaries as ...

  8. What is the difference between POP3 and IMAP? - AOL Help

    help.aol.com/articles/what-is-the-difference...

    • Emails are stored on a single device. • Sent messages are stored on a single device. • Emails can only be accessed from a single device. • If you want to keep messages on the server, make sure the setting "Keep email on server" is enabled or all messages are deleted from the server once downloaded to the app or software.

  9. Network bridge - Wikipedia

    en.wikipedia.org/wiki/Network_bridge

    A high-level overview of network bridging, using the ISO/OSI layers and terminology. A network bridge is a computer networking device that creates a single, aggregate network from multiple communication networks or network segments. This function is called network bridging. [1] Bridging is distinct from routing.

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