computers sowa 2015-platform

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