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  2. CCNA - Wikipedia

    en.wikipedia.org/wiki/CCNA

    CCNA (Cisco Certified Network Associate) is an entry-level information technology (IT) certification offered by Cisco Systems. CCNA certification is widely recognized in the IT industry as the foundational step for careers in IT positions and networking roles. [1] [2] Cisco exams routinely change in response to evolving IT trends. [3]

  3. Client Puzzle Protocol - Wikipedia

    en.wikipedia.org/wiki/Client_Puzzle_Protocol

    Client Puzzle Protocol (CPP) is a computer algorithm for use in Internet communication, whose goal is to make abuse of server resources infeasible. It is an implementation of a proof-of-work system (PoW).

  4. Cisco certifications - Wikipedia

    en.wikipedia.org/wiki/Cisco_certifications

    Cisco Certifications are the list of the Certifications offered by Cisco Systems.There are four to five (path to network designers) levels of certification: Associate (CCNA/CCDA), Professional (CCNP/CCDP), Expert (CCIE/CCDE) and recently, Architect (CCAr: CCDE previous), as well as nine different paths for the specific technical field; Routing & Switching, Design, Industrial Network, Network ...

  5. Message sequence chart - Wikipedia

    en.wikipedia.org/wiki/Message_Sequence_Chart

    In a Sequence Diagram, a vertical line is usually an object. The object can be active (in its own thread of execution) or passive (in the execution context of an active object). Arrows; In an MSC an arrow is usually an asynchronous message sent from one entity to another one. Once the message is sent the sending entity resumes its execution.

  6. Cisco Networking Academy - Wikipedia

    en.wikipedia.org/wiki/Cisco_Networking_Academy

    Print/export Download as PDF; Printable version; In other projects ... Cisco Networking Academy or NetAcad is an online global educational program product of American ...

  7. Sequence diagram - Wikipedia

    en.wikipedia.org/wiki/Sequence_diagram

    The diagram emphasizes events that cross the system boundary from actors to systems. A system sequence diagram should be done for the main success scenario of the use case, and frequent or complex alternative scenarios. There are two kinds of sequence diagrams: Sequence Diagram (SD): A regular version of sequence diagram describes how the ...

  8. Ethernet frame - Wikipedia

    en.wikipedia.org/wiki/Ethernet_frame

    The frame check sequence (FCS) is a four-octet cyclic redundancy check (CRC) that allows detection of corrupted data within the entire frame as received on the receiver side. According to the standard, the FCS value is computed as a function of the protected MAC frame fields: source and destination address, length/type field, MAC client data ...

  9. Protocol data unit - Wikipedia

    en.wikipedia.org/wiki/Protocol_data_unit

    The matching layer, or "peer", decodes the data to extract the original service data unit, decide if it is error-free and where to send it next, etc. Unless we have already arrived at the lowest (physical) layer, the PDU is passed to the peer using services of the next lower layer in the protocol "stack".