Go_Networks_Security

advertisement
Technology In Action Chapter 12
Computer Networks & Security
•
•
•
•
•
•
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
NEXT
SLIDE
1
Technology In Action Chapter 12
Topics
•
•
•
•
•
Types of transmission media
Network software
Network adapters
Moving data in a client/server network
Securing networks
NEXT
SLIDE
2
Technology In Action Chapter 12
Networking Advantages
• Networks:
– Increase productivity
– Enable the sharing of resources
– Facilitate Internet connectivity
NEXT
SLIDE
3
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
NEXT
SLIDE
4
Technology In Action Chapter 12
•
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
NEXT
county
SLIDE
5
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
NEXT
SLIDE
6
Technology In Action Chapter 12
Constructing Client/Server
Networks
•
•
•
•
•
•
Servers
Network topologies
Transmission media
Network operating system (NOS)
Network adapters
Network navigation devices
7
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
NEXT
SLIDE
24
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
NEXT
SLIDE
25
Download
Random flashcards
Arab people

15 Cards

Radiobiology

39 Cards

Radioactivity

30 Cards

Marketing

46 Cards

Create flashcards