Networks
Netwotk definition
a network is the union of two or more computers so that they are able to share resources, files, directories, disks, programs, printers, ...
Software components
Operating System
provides common services for computer programs
Hostname
unique device that the network is associated
IP Adress
unique identifier for each device
MAC Adress
is a unique idetifier of each host and is associated with the NIC
Port
is a logical channel which allows network users to send or receive data to an application.
DNS
Performs the conversion of a name to an IP and vice versa
Protocols
Set of rules in a network
Firewall
Protects the network
Types of networks
PAN
Few meters network
LAN
Local network
MAN
Metropolitan area
WAN
City or Country network
VPN
Internet networks with private connections
Physical components
Router
interconnect computers
USB Driver
storing data
Computer
Processing and storing data
Switch
recive data and send it to a destination