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  2. 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 ...

  3. CCNA - Wikipedia

    en.wikipedia.org/wiki/CCNA

    CCNA ( Cisco Certified Network Associate) is an information technology (IT) certification from Cisco Systems. CCNA certification is an associate-level Cisco Career certification. [1] Cisco exams have changed several times in response to changing IT trends. [2] In 2020, Cisco announced an update to its certification program that "Consolidated ...

  4. Certified information systems security professional - Wikipedia

    en.wikipedia.org/wiki/Certified_Information...

    A dispensation can be claimed for one year with the relevant academic qualification. The final step is payment of the annual maintenance fee of $135 (as of 2024). The CISSP credential is valid for three years; holders renew either by submitting 40 Continuing Professional Education (CPE) credits per year over three years or re-taking the exam.

  5. Virtual Router Redundancy Protocol - Wikipedia

    en.wikipedia.org/wiki/Virtual_Router_Redundancy...

    Virtual Router Redundancy Protocol. The Virtual Router Redundancy Protocol ( VRRP) is a computer networking protocol that provides for automatic assignment of available Internet Protocol (IP) routers to participating hosts. This increases the availability and reliability of routing paths via automatic default gateway selections on an IP ...

  6. CCIE Certification - Wikipedia

    en.wikipedia.org/wiki/CCIE_Certification

    The Cisco Certified Internetwork Expert, or CCIE, is a technical certification offered by Cisco Systems. The Cisco Certified Internetwork Expert (CCIE) and Cisco Certified Design Expert (CCDE) certifications were established to assist the industry in distinguishing the top echelon of internetworking experts worldwide and to assess expert-level ...

  7. Open Shortest Path First - Wikipedia

    en.wikipedia.org/wiki/Open_Shortest_Path_First

    Open Shortest Path First ( OSPF) is a routing protocol for Internet Protocol (IP) networks. It uses a link state routing (LSR) algorithm and falls into the group of interior gateway protocols (IGPs), operating within a single autonomous system (AS). OSPF gathers link state information from available routers and constructs a topology map of the ...

  8. List of TCP and UDP port numbers - Wikipedia

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

    Cisco IOS IP Service Level Agreements Control Protocol [citation needed] 1972: Yes: InterSystems Caché, and InterSystems IRIS versions 2020.3 and later 1984: Yes: Big Brother: Unofficial: Arweave mining node: 1985: Assigned: Yes: Cisco Hot Standby Router Protocol (HSRP) [self-published source] 1998: Yes: Cisco X.25 over TCP service 2000: Yes

  9. Linux - Wikipedia

    en.wikipedia.org/wiki/Linux

    A Linux-based system is a modular Unix-like operating system, deriving much of its basic design from principles established in Unix during the 1970s and 1980s. Such a system uses a monolithic kernel, the Linux kernel, which handles process control, networking, access to the peripherals, and file systems.

  10. Certified ethical hacker - Wikipedia

    en.wikipedia.org/wiki/Certified_Ethical_Hacker

    Certified Ethical Hacker ( CEH) is a qualification given by EC-Council and obtained by demonstrating knowledge of assessing the security of computer systems by looking for vulnerabilities in target systems, using the same knowledge and tools as a malicious hacker, but in a lawful and legitimate manner to assess the security posture of a target ...

  11. Enhanced Interior Gateway Routing Protocol - Wikipedia

    en.wikipedia.org/wiki/Enhanced_Interior_Gateway...

    Enhanced Interior Gateway Routing Protocol. Enhanced Interior Gateway Routing Protocol ( EIGRP) is an advanced distance-vector routing protocol that is used on a computer network for automating routing decisions and configuration. The protocol was designed by Cisco Systems as a proprietary protocol, available only on Cisco routers.