+
Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
|
Simple network:
|
A client computera dedicated server computer, network interfaces, a connection medium, network operating system software, and either a hub or a switch.
|
|
Network interface card ( NIC)
|
Expansion card inserted into a computer to enable it to connect to a network.
|
|
The network operating system ( NOS)
|
routes and manages communications on the network and coordinates network resources.
|
|
A server computer
|
Is a computer on a network that performs important network functions for client computers, such as serving up Web pages, storing data, and storing the network operating system ( and hence controlling the network).
|
|
Hubs
|
are very simple devices that connect network components, sending a packet of data to all other connected devices.
|
|
A switch
|
has more intelligence than a hub and can filter and forward data to a specified destination on the network.
|
|
A router
|
is a communications processor used to route packets of data through different networks, ensuring that the data sent gets to the correct address.
|
|
Contemporary digital networks and the Internet are based on three key technologies:
|
client/ server computing, the use of packet switching, the development of widely used communications standards ( the most important of which is Transmission Control Protocol/ Internet Protocol, or TCP/ IP) for linking disparate networks and computers.
|
|
Packet switching
|
Is a method of slicing digital messages into parcels called packets, send-ing the packets along different communication paths as they become available, and then reassembling the packets once they arrive at their destinations
|
|
A protocol
|
is a set of rules and procedures governing transmission of information between two points in a network.
|
|
Transmission Control Protocol/ Internet Protocol (TCP/ IP)
|
Dominant model for achieving connectivity among different networks. Provides a universally agreed- on method for breaking up digital messages into packets, routing them to the proper addresses, and then reassembling them into coherent messages.
|
|
TCP refers to the Transmission Control Protocol (TCP),
|
which handles the movement of data between computers. TCP establishes a connection between the computers, sequences the transfer of packets, and acknowledges the packets sent.
|
|
IP refers to the Internet Protocol ( IP)
|
which is responsible for the delivery of packets and includes the disassembling and reassembling of packets during transmission.
|
|
Application layer.
|
The Application layer enables client application programs to access the other layers and defines the protocols that applications use to exchange data.
|
|
Transport layer.
|
The Transport layer is responsible for providing the Application layer with communication and packet services.
|
