networks Flashcards
What is a computer network?
Two or more computers connected together to allow them to communicate.
Networks can be local (LAN) or wide-area (WAN).
Define protocol in the context of computer networks.
Rule to ensure messages are passed on correctly.
Protocols govern data exchange between devices.
What is a hub?
A device that connects a number of computers together in the same room or building.
Hubs operate at the physical layer of the OSI model.
What is the primary function of a server?
A powerful computer that provides services to other computers on a network.
Servers can host websites, manage resources, and store data.
What does a router do?
A device that connects different networks together and allows them to communicate.
Routers can direct data traffic efficiently.
What is Bluetooth?
A wireless technology for connecting devices together over short distances, such as between a phone and headphones.
Bluetooth operates in the 2.4 GHz frequency range.
Define bandwidth.
The amount of data that can be moved from one point to another in a given time, usually measured in Megabits per second (Mbps).
Higher bandwidth allows for faster data transmission.
What are packets?
Small units of data that messages are split into to be sent over a network.
Packets include headers containing routing information.
What is an IP address?
A unique number used to identify a device on the internet.
IP addresses can be IPv4 or IPv6 formats.
What is the function of a browser?
A computer program that allows users to browse websites, such as Google Chrome.
Browsers interpret HTML and render web pages.
What does HTTP stand for?
Hypertext Transfer Protocol.
HTTP is used for viewing web pages that are not secure.
What is the difference between HTTP and HTTPS?
HTTPS is a secure version of the HTTP protocol for viewing web pages.
HTTPS uses SSL/TLS to encrypt data.
