NETWORKS
Why do we use a network
To share
Applications
Peripherials
Data
To communicate
Send messages
Send data
Subtopic
Network elements
Two computer server
Interfaces card
Network operating system softwere
A connection medium
Ethernet connections
WHAT IS A NETWORK
It is the union of several computers
To create the network hardwere is nedeed that unites devices and a softwere who implements the rules of communication.
TCP IP control
TCP:enables application programs
and computing devices to exchange messages over a
network.
IP method for sending data from
one device to another across the internet.:
Type of networks
Size
P.A.N (personal area network)
LAN (Local area network)
MAN Metropolitan area network
WAN WIDE AREA NETWORK
VPN virtual private network
TOPOLOGY
they are inexpensive, easy to install,
and uses less wiring.
if any one of the device fails the rest of the devices
aren’t affected. But if the hub fails, the
entire network shuts down.
Tree topology
the network is easy to manage as it is divided into smaller
networks.It is used in large organizations.
Mesh network topology
Every node is connected to eachother it is the most expensive
TECHNOLOGY
point to point
Difussion
multipoint
Media connection
unguided media
guided media wired
Funtionality
Client server network
a client runs the program
and access data that are stored on
the server.
pear to pear network
facilitates the flow of
information from one peer to
another without any central server.
NETWORK HARDWERE
ROUTER TRANSFER DATA PACKETS BETWEEN DIFFERENT COMPUTER NETWORK
repeater recives the signal and regenerates,after it re-transmits so tht it travels longer distances
Motherboard
Data transmition
The data is transmited in packets
The transmission of two or more simultaneous stations involves a data collision, and the transmission by both stations must be repeated
It transmits a single station in an oderly manner
The network diagram
Unique identifiers of network
DNS
Hostname
Ip adress
MAC adress
Port
DNS server