Cyber Unit 3 - Data Network Architectures

SOHO Network

A small network serving 10 or fewer employees primarily using a peer-to-peer intranet architecture

Wifi Router

A device that serves as a WAP and allows for a limited number of wired Ethernet connections

Line

A network connection between an endpoint and a node that carries traffic destined for only one endpoint

Trunk

A network connection between nodes that carries shared traffic for multiple endpoints

Load balancing

A design feature that distributes traffic across a variety of inter-node trunks to keep network speed at a maximum

Domain Controller (DC)

A network server that authenticates and authorizes users and audits network access

Application Server

A server that hosts business logic and acts as an intermediary between end users and backend databases

WLAN Controller (WLC)

A network device used to enable centralized management of multiple wireless access points

Intranet

The trusted and private portion of a network intended only for an organization's members and authorized devices

Extranet

A semi-trusted perimeter network accessed via VPN by external entities like vendors and partners

Guest Network

An untrusted zone on a network permitting anonymous access over the Internet

DMZ (Perimeter Network)

A network zone containing all publicly accessible devices and dedicated single-application servers

Collapsed Core Architecture

A network design that eliminates the distribution layer and connects access layer switches directly to the core

Enterprise WAN

A network comprised of multiple geographically separated enterprise LANs connected together using edge routers

Screened Subnet

A segmented security configuration using a Gateway Router for internet traffic and a separate router for Intranet traffic

Cisco IOS

A proprietary operating system accessed through a CLI with integrated routing and switching functions

Console Port

A physical port on a Cisco device used for initial configuration using a console cable and terminal emulation software

User-EXEC Mode

CLI mode indicated by a > prompt that only allows viewing system status and basic diagnostics

Privileged-EXEC Mode

CLI mode indicated by a # prompt that acts like a super user mode allowing access to configuration menus

Global Configuration Mode

CLI mode indicated by a (config)# prompt used to make actual changes to device configurations