A computer network allows computers and other devices to communicate and share resources. It consists of hardware like network interface cards, hubs, switches, and cables that connect devices. It also includes software to facilitate communication between nodes on the network. Common network topologies include bus, ring, and star configurations that determine how devices are physically connected to each other through cables or wireless links.

1. 9
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2. Computer Network)
Shared Resource)
File Server) Communication Chanel)
Workstation or Terminal) Network
Operation System)
Resources)
LAN)
Host
Computer
Receiver) Transmitter)
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3. UTP)
STP)
(Workstation or Terminal)
(Workstation)
Terminal)
Host
Network Interface Card :NIC)
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4. Modem : Modulator Demodulator)
(Digital)
Analog)
Hub)
Star)
File Server
Workstation
Windows NT , Linux ,
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5. Novell Netware , Windows XP ,Windows 2000 , Solaris , Unix
TOPOLOGY)
1. bus topology)
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6. 2. ring topology)
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7. 3. (star topology)
hub)
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