LAN-BN (Class 6)

LAN (Local Area Network)

Everyone connected to the same router

Benefits of LAN

Information, resource, and software sharing, device management

LAN Components

Network OS, transmission media, hubs/switches, NICs, Hosts

NIC (Network Interface Card)

A device that serves as an interface between the computer and the network. Also called a network adapter or network card.

Layer of NIC

Data Link Layer

Wired LAN Components

cable, Hub, switch, router

different types of cables

Untwisted wire pairs (UTP), Shielded twisted pair (STP), optical fiber

Hub Based wired lan

topology: Bus, All messages flow into central cable, and are received by all other computers

switch based wired lan

topology: star, switch reads destination address of the frame and only sends it to the right port

Why Wireless lan

Mobility for devices, service where wires are not feasible, eliminates cabling

Access points

use radio waves to connect wireless clients to the wired network

Downside of wireless lan

speed and security

Wifi access point range

around 50-75 square foot range

BN (Backbone Network)

high speed network linking LANs