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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]
To earn this certification one must pass the 210-260 IINS (Implementing Cisco IOS Network Security) exam, as well as hold a current CCNA certification. The CCNA-Security is a prerequisite to the CCNP Security certification. [23] It represents the required exam to earn the certification and for continuing the security certification path to the CCNP.
The validity of CCNP Certification is 3 years. Renewal requires certification holders to register for and pass same or higher level Cisco recertification exam(s) every 3 years or obtain 80 continuing education credits.
Cisco Discovery Protocol (CDP) is a proprietary data link layer protocol developed by Cisco Systems in 1994 [1] by Keith McCloghrie and Dino Farinacci. It is used to share information about other directly connected Cisco equipment, such as the operating system version and IP address.
In IEEE 802 LAN/MAN standards, the medium access control (MAC), also called media access control, is the layer that controls the hardware responsible for interaction with the wired (electrical or optical) or wireless transmission medium.
A simple sorting algorithm that builds the final sorted array (or list) one item at a time. instruction cycle. Also fetch–decode–execute cycle or simply fetch-execute cycle. The cycle which the central processing unit (CPU) follows from boot-up until the computer has shut down in order to process instructions. It is composed of three main ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 26 January 2025. Family of Unix-like operating systems This article is about the family of operating systems. For the kernel, see Linux kernel. For other uses, see Linux (disambiguation). Operating system Linux Tux the penguin, the mascot of Linux Developer Community contributors, Linus Torvalds Written ...
The completion of a finitely generated module M over a Noetherian ring R can be obtained by extension of scalars: M ^ = M ⊗ R R ^ . {\displaystyle {\widehat {M}}=M\otimes _{R}{\widehat {R}}.} Together with the previous property, this implies that the functor of completion on finitely generated R -modules is exact : it preserves short exact ...