computers sowa 2015-platform
TRANSCRIPT
Computers, operating
Systems, and
Networks….
By Silvia Sowa
Carry out specific tasks
Arithmetic & mathematic
Operations
Sequences of processes
Components: Input peripherals
Output
Mixed peripherals
Storage
Memories
Central Processing Unit or CPU
Executes a series of instructions
Integrated circuits
Computer parts
Computer
parts
Inside the computer
Computer devices
A: Power
Connector
B: Power Supply
Unit
(PSU)
C: Mouse Port
D: Keyboard Port
E: USB Port
F: Parallel Port
(Printer Port)
G: Serial Port
(COM
Port)
H: Game Port
I: Monitor Port
J: Ethernet Port
(RJ- g45)
K: Modem
Operating systems can be found on almost any device that
contains a computer
From cellular phones and video games consoles to
supercomputers and web servers. Examples:
Input - output
Memory Allocation
Mass storage
Printing – downloading – copying, etc.
OPERATING SYSTEMS - PROCESS AND FUNCTION
USER APPLICATION O S HARDWARE
Convenient
Efficient
Organized
In constant evolution
Versitile
Changing
Adaptable
NETWORKS
Scale
Connection
Services Protocol
Topology
Home PAN (personal area Network)
Ethernet (a physical and data link
layer technology for local area networks)
Line
1. CONNECTION
2. Services: pubic or private
5. Protocol: according to established
protocol
4. Topology: tree, ring, star, bus, mesh
3.Scale: WAN, LAN, PAN, CAN…
• Bus networks: use a common backbone to connect all devices.
Network Topologies
Ring Topology
• In a ring network, all messages travel through a ring in the same direction (either "clockwise" or "counterclockwise"). A failure in any cable or device breaks the loop and can take down the entire network.
Tree
• Integrates multiple star topologies together onto a bus. In its simplest form, only hub devices connect directly to the tree bus, and each hub functions as the root of a tree of devices.
Star
• A star network features a central connection point called a "hub node" that may be a network hub , switch or router .
Mesh • Mesh topologies involve the concept of
routes. Unlike each of the previous topologies, messages sent on a mesh network can take any of several possible paths from source to destination.
References
• http://compnetworking.about.com/od/networkdesign/a/topologies.htm
• http://www.petervaldivia.com/computers/
• http://gsdisposals.com/computer-parts-recycling/
• http://en.wikipedia.org/wiki/Operating_system