NETWORKING

OBJECTIVES Identify network topologies Identify hardware components of a network

WHAT IS A NETWORK? Productive way to utilize a group of computers Two or more computers linked together –Share resources –Security –Communication

NETWORK COMPONENTS Cables Adapter Cards Servers Workstations Printers Modems

NETWORK TOPOLOGIES MESH BUS RING STAR

NETWORK TOPOLOGIES Mesh Network A pure mesh network has point-to-point links (a direct connection between two devices) between every node in the network.

NETWORK TOPOLOGIES Bus Network A bus topology is a linear transmission medium terminated at both ends. All nodes attach directly to this medium via relatively short links.

NETWORK TOPOLOGIES Ring Network The ring topology consists of a closed loop of directly linked devices between repeaters.

NETWORK TOPOLOGIES Star Network HUB In a star network, each device connects to a central point called a hub or concentrator. Information sent from a device always goes to the hub first and then is routed appropriately.

NETWORK TOPOLOGIES Hybrid Network Hybrids use multiple topologies Wide Area Networks (WAN) often use direct links to connect remote rings or stars

NETWORK TOPOLOGIES Hybrid Network

LAN D LAN C LAN B File Server NETWORK TOPOLOGIES Mesh Network

Application Presentation Session Data Link Physical Network Transport NETWORK STANDARDS MODEL Open Systems Interconnection - OSI by ISO International Standards Organization To promote Multi-Vendor Inter-operability

OSI Model – Memorizing Tip All People Seem To Need Data Processing