Network Basics

Devices on a Network

some of Network Icons 

Network Interface Card (NIC)

Network Interface Card (NIC)

Network Interface Card (NIC)

•Layer 2, Data Link Layer, device

•Connects the device (computer) to the LAN

•Responsible for the local Layer 2 address (later)

•Common Layer 2 NICs:

–Ethernet

–Token Ring

•Common Bandwidth

–10 Mbps, 10/100 Mbps, 10/100/1000 Mbps

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Tracing the Physical Connection . NIC (Network Interface Card)

Ethernet Local Area Networks (LANs)

•LAN (Local Area Network) - A group of computers and associated devices (printers, etc.) connected through a wired or wireless medium by networking devices (hubs, switches, routers) and administered by a single organization.

•LAN devices

–- Switches (and hubs)

–- Routers

–- Multilayer switches