OUR FIRST MEETING IN I.T. 2 WITH PROF. DOSEJO

Network

A network consists of two or more computers that are linked in order to share resources (such as printers and CD's), exchange files, or allow electronic communications. The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams.

Data Network

Sharing data through the use of  floppy disks an efficient or cost-effective manner. Business needed a solution that would successfully address the following three problems:

. How to avoid duplication of equipment and resources.

. How to communicate efficiently.

. How to set up and mange a network.

Business realized that networking technology could increase productivity while saving money.

Equipment that connects directly to a network segments referred to as to as device.

These devices are broken up into two classifications:

- End user devices

- Network devices

 End user devices include computers, printers, scanner and other devices that provide services directly to the user.

Network devices include  all the devices that connect the end user  devices together to allow them to communicate.

Topology

is the mathematical study of the properties that are preserved through deformations, twisting  and stretching of objects. Tearing, however, is not allowed.

- physical topology 

- logical topology

Bus topology

Ring topology

Star topology

Extended star topology

Mesh topology

Tree topology

PHYSICAL & LOGICAL TOPOLOGY

         Media                                            Physical topology                                 Logical topology

        Ethernet                                      Bus, Ring, Point to Point                                   Bus

FFDI Fiber Distributed                                       Ring                                                    Ring

Data Interconnect

Token Ring                                                        Star                                                      Ring

LAN      - Local Area Network

MAN     - Metropolitan Area Network

WAN     - Wide Area Network

UTP - Unshielded Twisted Pair 

VPN - Virtual Private network