OSI Model

OSI Model OSI stands for Open Systems Interconnection Model Layer 1 - Physical layer Defines physical media properties Electrical functions. Physical data rates. Physical connectors. Cable distances. Optical wavelength. Wireless frequency. Typical layer 1 devices Cat5 cablesFiber optical cableRepeatersHubs. Layer 2 - Data link layer Defines data format for transmission. Eg: Ethernet, Frame Relay, PPP(Point…

Networking Devices

Basic networking devices: SwitchesRouters Switches: Switches are used to connect endpoint to LAN (Local Area Network) Types of switches: AccessDistribution / AggregationCore Routers: Connects multiple local area networks.Choose the best path between LAN and WAN (Wide Area Network) Type of routers: Branch - Lower end for SOHO or remote office connections.WAN / Enterprise edge -…