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  2. Packet Tracer - Wikipedia

    en.wikipedia.org/wiki/Packet_Tracer

    Packet Tracer is a cross-platform visual simulation tool designed by Cisco Systems that allows users to create network topologies and imitate modern computer networks.The software allows users to simulate the configuration of Cisco routers and switches using a simulated command line interface.

  3. Switch virtual interface - Wikipedia

    en.wikipedia.org/wiki/Switch_virtual_interface

    Provide Layer 3 IP connectivity to the switch. Support bridging configurations and routing protocol. Access Layer - 'Routed Access' Configuration (in lieu of Spanning Tree) SVIs advantages include: Much faster than router-on-a-stick, because everything is hardware-switched and routed. No need for external links from the switch to the router for ...

  4. Cisco IOS - Wikipedia

    en.wikipedia.org/wiki/Cisco_IOS

    Information about the IOS version and feature-set running on a Cisco device can be obtained with the show version command. [6] Most Cisco products that run IOS also have one or more "feature sets" or "packages", typically eight packages for Cisco routers and five packages for Cisco network switches.

  5. Cisco Catalyst - Wikipedia

    en.wikipedia.org/wiki/Cisco_Catalyst

    The inside of a Cisco 1900-series switch. Catalyst is the brand for a variety of network switches, wireless controllers, and wireless access points sold by Cisco Systems.While commonly associated with Ethernet switches, a number of different types of network interfaces have been available throughout the history of the brand.

  6. VLAN hopping - Wikipedia

    en.wikipedia.org/wiki/VLAN_hopping

    To prevent this attack on Cisco IOS, use one of the following methods: [2]: 163 1. Ensure that ports are not set to negotiate trunks automatically by disabling DTP: Switch (config-if)# switchport nonegotiate. 2. Ensure that ports that are not meant to be trunks are explicitly configured as access ports Switch (config-if)# switchport mode access

  7. Cisco NX-OS - Wikipedia

    en.wikipedia.org/wiki/Cisco_NX-OS

    NX-OS is a network operating system for the Nexus-series Ethernet switches and MDS-series Fibre Channel storage area network switches made by Cisco Systems. It evolved from the Cisco operating system SAN-OS, originally developed for its MDS switches. [1] It is based on Wind River Linux and is inter-operable with other Cisco operating systems.

  8. Cisco Nexus switches - Wikipedia

    en.wikipedia.org/wiki/Cisco_Nexus_switches

    The Cisco Nexus series switches are modular and fixed port network switches designed for the data center. Cisco Systems introduced the Nexus Series of switches on January 28, 2008. The first chassis in the Nexus 7000 family is a 10-slot chassis with two supervisor engine slots and eight I/O module slots at the front, as well as five crossbar ...

  9. Cisco IOS XE - Wikipedia

    en.wikipedia.org/wiki/Cisco_IOS_XE

    Cisco IOS is a monolithic operating system running directly on the hardware while IOS XE is a combination of a Linux kernel and a monolithic application (IOSd) that runs on top of this kernel. On the other hand, IOS XR is based on QNX (since version 5.0 it's also based on Linux), where the IOSd application has been separated into many different ...