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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.
The Internetworking Operating System [2] (IOS) is a family of proprietary network operating systems used on several router and network switch models manufactured by Cisco Systems. The system is a package of routing, switching, internetworking, and telecommunications functions integrated into a multitasking operating system.
ifconfig (short for interface config) is a system administration utility in Unix-like operating systems for network interface configuration. The utility is a command-line interface tool and is also used in the system startup scripts of many operating systems.
Enterprise-class router, firewall, VPN, intrusion protection and more delivered as a complete network operating system that runs on x86 hardware or in XenServer, VMware or Hyper-V to provide vFirewall, vRouter network virtualization functionality. VyOS: Active: Linux distribution: x86, x86-64: RAM : 512MB Storage : 2GB (recommended) GPL v2
eth0 is the interface name of the network interface card representing an Ethernet port. ppp0 is a PPPoE interface, which is configured as the default route in this example. A default route is recognized by the destination 0.0.0.0 and the flag G. A network router is identified by the network mask 255.255.255.255 and the flag H.
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.
Internet Pluribus Packet Core: 0x44 68 Any distributed file system 0x45 69 SAT-MON SATNET Monitoring 0x46 70 VISA VISA Protocol 0x47 71 IPCU Internet Packet Core Utility 0x48 72 CPNX Computer Protocol Network Executive 0x49 73 CPHB Computer Protocol Heart Beat: 0x4A 74 WSN Wang Span Network: 0x4B 75 PVP Packet Video Protocol: 0x4C 76 BR-SAT-MON
The Cisco Internetwork Operating System enables network administrators to modify the distance by changing the distance value in sub-router configuration mode. In the example below, RIP's administrative distance is changed to 89 so that it used in preference to OSPF. [3]