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SSH: Secure Socket Shell is a network protocol that provides administrators with a secure way to access a remote device via a virtual text-based interface.

Telnet: an unsecured network protocol that allows unsecured access to a remote device via a virtual text-based interface.

Serial Port: a 9-pin connection on a computer.

Console: A serial connection; using a console cable to go from a PC serial port (DB9) to the RJ45 console port on the Cisco device.

Monitor: A telnet / SSH session

Terminal: a broader term for either the console or monitor connection.

VTY: a single terminal connection. It stands for Virtual TeletYpe

Interface: The physical connection between a particular network and a Cisco device.

OSI layers: physical, data link, network, transport, session, presentation, and application.

NAT: Network Address Translation. The translation of a network address and/or port to another network address/or port.

Address object: assigning a "friendly name" to an IP address.

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Vlan links


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