Networks are used to transmit data in various environments, including homes, small businesses, and large enterprises.
A main office can have hundreds or even thousands of people who depend on network access to do their jobs.
A network is a connected collection of devices that can communicate with each other.
A main office usually has one large network to connect users
The purpose of a network is to create means to provide workers with access to all information and components that are accessible by the network.
Remote locations cannot connect to a main office through a network
To interconnect networks and choose the best paths between them.
To provide the connect points for media
To serve as the endpoint in the network, sending and receiving data
To provide the means by which the signals are transmitted from one network device to another
To connect separate networks and filter the traffic over those networks so that the data is transmitted through the most efficient route
To choose the path over which data is sent to its destination
To serve as the endpoint in the the network, sending and receiving data
To provide network attachment to the end systems and intelligent switching of the data within the local network
To connect separate networks and filter the traffic over those networks so that the data is transmitted through the most efficient route
To choose the path over which data is sent to its destination
To provide the means for data to travel from one point to another in the network
To provide network attachment to the end systems and intelligent switching of the data within the local network
Memory
Applications
Peripherals
Storage devices
Data
Collaboration
Graphics creation
Databases
Word processing
Spreadsheets
A physical topology defines the way in which CPU's, printers, networks, devices, and other devices are connected
There are two primary categories of physical topologies; bus and star
A physical topology describes the paths that signals travel from one point to another
The choice of a physical topology is largely influences by the type of data that is to be transmitted over the network
A logical topology defines the way in which the CPU's, printers, network devices and other devices are connected
A logical topology depends solely on the type of computers that are to be included on the network
A logical topology describes the paths that the signals travel from one point on a network to another
A network connot have different logical and physical topologies
Instead of cables, wireless communications uses RF or infrared waves to transmit data
To receive the signals from the access point, a computer needs to have a wireless adapter card or wireless NIC.
For wireless LAN's, a key component is a router, which propagates signal distribution.
Wireless networks are not very common and, generally, only large corporations use them
A deliberate attack from outside
A deliberate or accidental attack from inside
Misuse by customers
Misuse by employees
Password attacks
DDoS
Trojan Horse
Love Bug
Hacker tools require more technical knowledge to use
Hacker tools have become more sophisticated
The number of reported security threats has remained constant year to year
Hacker toos require less technical knowledge to use
Wait!
Here's an interesting quiz for you.