Technology In Action Chapter 12
Computer Networks & Security
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Advantages of a network
Client/server and peer-to-peer networks
Classifications of client/server networks
Client/server network components
Types of servers
Network topologies
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Technology In Action Chapter 12
Topics
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Types of transmission media
Network software
Network adapters
Moving data in a client/server network
Securing networks
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Technology In Action Chapter 12
Networking Advantages
• Networks:
– Increase productivity
– Enable the sharing of resources
– Facilitate Internet connectivity
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Technology In Action Chapter 12
Client/Server Networks
• Server based network:
– Clients
– Servers
• Data flows efficiently
• Servers respond to
requests from clients
• Servers perform
specific tasks
• Scalable network
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Technology In Action Chapter 12
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Classifications of Client/Server
Networks
LAN:
– Local area network
– Computers linked together over a small
geographic region
• WAN:
– Wide area network
– Computers linked together over large diverse
geographic locations
• MAN:
– Metropolitan area network
– Computers linked together within a city or
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Technology In Action Chapter 12
Classifications of Client/Server
Networks
• PAN:
– Personal area network
– Wireless devices connected in close proximity
to each other
• Intranet:
– Private corporate network
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Technology In Action Chapter 12
Constructing Client/Server
Networks
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Servers
Network topologies
Transmission media
Network operating system (NOS)
Network adapters
Network navigation devices
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Technology In Action Chapter 12
Network Security
• Authentication:
– User ID and password used to access the
network
• Access privileges:
– Enable access to certain network systems
• Physical protection measures:
– Restrict physical access to sensitive network
equipment
– Magnetic card readers
– Biometric access devices
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Technology In Action Chapter 12
Network Security
• Firewalls:
– Prevent access to the network by
unauthorized users
– Composed of software and/or hardware
– Screens and validates data packets
– Bastion host/proxy server
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