Transcript Today`s Topics

Today’s Topics
Chapter 8: Networks
 HTML Introduction
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Chapter 8: Networks
Network Fundamentals
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Network: group of two or more computer systems linked
together to exchange data and share resources
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Local Area Network (LAN): links computers or peripherals within
a small geographic area
Wide Area Network (WAN): links computers within a large area
Workstation or Client: computer that is connected to a
network
Node: workstation or peripheral that is connected to the
network
Network Interface Card (NIC): expansion board to
connect to a network
Network Fundamentals
Router: complex device used to connect
two or more LANs or WANs
 File Server: high-capacity, high-speed
computer with a large hard disk
 Network Operating System (NOS):
software required to run the network
 Network Administrator or Network
Engineer: person who installs, maintains,
and supports computer networks
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Advantages of Networking
Reduced Hardware Costs
 Application Sharing
 Sharing Information Resources
 Centralized Data Management
 Connecting People
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Disadvantages of Networking
Loss of Autonomy
 Lack of Privacy
 Security Threats
 Loss of Productivity
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LANs
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Peer-To-Peer Network (P2PN): all computers on
the network are equal
Client/Server Network: includes file servers as
well as clients
LAN Topologies
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Bus Topology (Daisy Chain): every workstation is
attached to a single bus
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Contention Management: a technique that specifies what
happens when a collision happens
Star Topology: uses a central wiring device (hub)
Ring Topology: all nodes are attached in a circular
wiring arrangement
LANs
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LAN Protocol: Standard that Enable NetworkConnected Devices to Communicate with Each
Other
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Ethernet: most popular networking system for large
and small businesses
LocalTalk: Mc computer networking system
Wi-Fi: wireless networking system
(https://wifi.umsl.edu)
Network Layers: Divided Network Architecture
WANs
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Point of Presence (POP): WAN network connection point
Backbone: high-capacity transmission lines that carry
WAN traffic
Transmission Control Protocol/Internet Protocol
(TCP/IP): Internet protocol
IP Address: Internet address, divided into four parts
which are separated by periods
Circuit Switching: sending data over physical end-To-end
circuit
Packet Switching: sending data into divided packet