End Devices:
Computers, network printers, VOIP phones, security cameras, mobile devices.
End devices are hosts.
A unique address is assigned to each host.
Hosts can act as a client, a server or both.
Intermediary devices connect hosts to the network and can also connect multiple networks.
Network Access:
Internetworking Devices:
Communications Servers and Modems
Security Devices:
Firewalls
Routers, Switches, Hubs and wireless access points (WAPs).
Intermediary Device Functions:
Retransmit and Regenerate data signals.
Maintain network and the Internet or information pathways.
In the event of an era or failure of their devices are notified.
Data is sent along alternate paths during a failure.
Quality Service sets message priority.
Security settings may permit or deny data.
Switches are Layer 2 devices, and Routers are layers 1, 2, 3.
Network Media:
Metallic Wires: CAT5, CAT6 ect...
Fiber Optics: Transmitted pulses of light, transmitted from either infrared or visible light sources
Wireless:transmitted patterns of electro-magnetic waves
What Are the Criterias Is for Choosing Network Media?
Cost
Environment
Distance
Amount of Speed Required, and data to be sent and received.
LAN: Local Area Networks:Group or groups of interconnected networks.
WAN: Wide Area Networks:Circuits used to connect local area networks and separate geographic location.
Internetwork: A global mesh of interconnected networks.
Internet: Interconnection of networks belonging to ISP's (Internet Service Providers).
Intranet: Privately connected LANS and WANS belonging to an organization.
Network Media:
