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Chapter 1: Computer Systems
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| bet | 4/10 | | Sana | 22.07.2024 | | Hajmi | 225,5 Kb. | | #268238 |
Bog'liq slides01Network Connections - Most modern networks share a single communication line
- Adding a new computer to the network is relatively easy
- Network traffic must take
- turns using the line, which
- introduces delays
- Often information is broken
- down in parts, called packets,
- which are sent to the receiving
- machine then reassembled
Local-Area Networks - A Local-Area Network
- (LAN) covers a small
- distance and a small
- number of computers
- A LAN often connects the machines
- in a single room or building
Wide-Area Networks - A Wide-Area Network (WAN)
- connects two or more LANs,
- often over long distances
- A LAN is usually owned
- by one organization, but
- a WAN often connects
- different groups in
- different countries
The Internet - The Internet is a WAN which spans the entire planet
- The word Internet comes from the term internetworking, which implies communication among networks
- It started as a United States government project, sponsored by the Advanced Research Projects Agency (ARPA), and was originally called the ARPANET
- The Internet grew quickly throughout the 1980s and 90s
- Less than 600 computers were connected to the Internet in 1983; now there are over 10 million
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