1 Networking Fundamentals Free Online FlashCards

What is a computer network?

A computer network is a group of connected devices that exchange data using agreed rules called protocols.

What is the Internet?

The Internet is a network of interconnected networks.

What role does a protocol play in networking?

A protocol is an agreed set of rules that devices use to exchange data.

What are encapsulation and decapsulation?

Encapsulation adds networking information to data as it moves toward its destination. Decapsulation interprets and removes that information at the receiving end.

How can data units be nested as they travel across a network?

Application data may be carried in a TCP segment or UDP datagram, placed inside an IP packet, and sent over a local link in a frame.

What information does a network header carry?

Headers carry control information, such as addresses or protocol identifiers, that helps handle and deliver the data.

Does a packet's route create a permanent connection?

Packets are forwarded individually through networks and routers. A packet's route does not necessarily create a permanent connection between devices.

What is a client in a network exchange?

A client is a device or program that requests a service.

What is a server in a network exchange?

A server is a device or program that provides a service to clients.

Are client and server different kinds of hardware?

Client and server describe communication roles, not distinct hardware types; one computer can take either role in different exchanges.

Why organize networking functions into layers?

Layering organizes communication functions into roles, making complex networking easier to describe and helping different technologies work together through compatible protocols.

What are the four TCP/IP layers, from highest to lowest?

The common four-layer TCP/IP model is Application, Transport, Internet, and Link, from highest to lowest.