- What is Network?
A network is a set of computers using common protocols that sends and receives data and messages enabling two or more computers to communicate with each other.
-Protocols
A formal description of message formats and the rules that two or more machines follow to exchange messages.
-Types of Protocols
1. TCP/IP ( Transmission Control Protocols/ / Internet Protocols)
2. UDP (User Datagram Protocols )
3. HTTP (Hyper Text Transfer Protocols)
4. FTP (File Transfer Protocols)
5. SMTP (Simple Mail Transfer Protocols)
6. POP3 (Post Office Protocols 3)
-Classification of Network
• Networks can be classified by size
–Small
• privately-owned
• cover a small area
• high data rates
–large
• owned/operated by a network provider
• large capacity
• often have an irregular topology
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