1.3.3 Networks Flashcards
What Is a Node?
A computer in a network.
What is a Network?
A collection of connected nodes.
What is a NIC?
Allows a node to attach to a network.
What is a switch?
Connects several devices in a network.
What is a LAN?
Local Area Network - Devices linked in the same geographic location
What is a WAN?
Wide Area Network - Devices linked across a large geographic area. Often connect via 3rd party channels.
What is a protocol?
A set of rules to govern data transmission.
What is HTTP?
Hyper Text Transfer Protocol - A protocol for viewing web pages.
What is HTTPS?
A protocol for viewing web pages securely using encryption.
What is FTP?
File Transfer Protocol - A protocol for transferring files.
What is a standard?
An agreed set of rules for creating a type of code
What is an Internet Protocol (IP) address?
A 4 byte number used to locate a device on a network unique.
What is a Media Access Control (MAC)?
A 6 byte hex number used to locate a network card or device. Always unique.
What is circuit switching?
A direct connection between two devices. Eg.a 1950’s phone call.
What is packet switching?
A connection between two devices sent in a small amounts of data.
Network Interface Card (NIC)
Provides a MAC address for a node.
Sends and receives network data.
What is Ethernet?
A type of wired connection using coper cables.Also a protocol and a standard
What is a Network Topology?
A map of how devices on a network connect to each other and the Internet.
What are the 3 types of network topologies?
Star Topology
Mesh Topology
Bus Topology
What is a server?
A computer that holds data for other computers.
What is a client?
A computer that requests data from a server
Two types of network service?
Client - Server and Peer to Peer
What is a Wireless Access Point?
A device that sends and receives data using radio signals.
What are the 2 types of WiFi speed?
2.4Ghz
5Ghz
What is a Layer?
A step in a protocol
What are the 4 layers for the TCP/IP stack?
Application
Transport
Internet
Link
What is Application Layer?
Select an appropriate protocol
What is the Transport layer?
Split data into packets. Add the packet numbers and a port.
What Is the Internet layer?
Add the sender and recipient IP. Creates a socket.
What is a Link layer?
Add the sender and recipient MAC addresses.
What is a DNS?
Domain Name System - A database matching IP addresses to Domain names.
What is a URL?
Uniform Resource Locater - The written of a website.
What are the key DNS characteristics?
Speed
Privacy
Personalisation
