51 terms

1.4 The Internet - GCSE OCR 9-1

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Terms in this set (...)

Network
Two (2) or more devices connected for the purposes of sharing data
Wide Area Network
The network connects computers and other resources over a large geographical area. Uses third party (e.g. BT/Virgin) infrastructure such as switches and cabling to transfer data between computers across the network e.g. the internet
Local Area Network
A network which covers a small area i.e. a single room or building
Internet
The largest WAN, available to most everyone around the world
Intranet
A private network found in schools and businesses, requires a password, and is protected by a firewall
Firewall
Software or hardware that keeps hackers out by preventing certain data packets, ports or users from accessing a network
Hacker
One who "cracks" into a computer or server for purposes of stealing data or creating viruses
Wi-Fi
Wireless Fidelity allows a computer to connect to the Internet without wires by use of a wireless adapter
Wi-Fi Adapter
Allows a computer or laptop to connect to a Wi-Fi signal
Network Interface Card
A piece of hardware that provides a physical connection to a network
Ethernet Cable
Used to connect a computer via the NIC to a Modem
Telephone Cable
Used to connect a DSL modem to the phone jack in the wall
Coaxial Cable
A shielded cable usually used with Satellite devices and/or Coaxial modems
Fiber Optic Cable
A cable used for high quality sound or transmission of high speed internet
Modem
Short for Modulate/Demodulate - a device that converts digital signals to/from a computer. It is used to connect to the Internet.
Server
Stores and retrieves data, programs, and files for client computers... may I help you?
Client
A computer that relies on a Server for storage and retrieval of files
NOS
Network Operating System allows a Client computer to communicate with a Server
Router
A hardware device used to connect different networks together. They forward data packets to the correct network. They are typically used to transfer data packets between a home network and the Internet
IP address
A unique address used to identify computers / devices on the Internet
MAC address
A unique address used to identify devices / devices on a LAN
URL
A website address is also known as a...
Domain Name System (DNS)
A server used to deal with requests to domain names by translating them to IP addresses and connecting to the host web server.
Cloud
Storing files or software on the Internet is also known as storing files in the _______
HTTPS
The protocol for secure and encrypted websites
Email
POP3, IMAP and SMTP are all ___________ protocols
Data centre
a building used to house
computer systems and associated
components, such as storage
systems
Amazon Web Services
Cloud service provided by Amazon.com, used for example by Netflix, for server farms for orders, business transactions, logins, content storage, etc.
RAID
Redundant Array of Independent Disks
Cloud Applications
An application that is hosted in the cloud but can be accessed by a users computer
Server hosting
A cloud computing service where a server is run for you and you can control it and access it via the internet
SSL
An abbreviation for Secure Sockets Layer; it is a protocol that provides security when communicating on the Internet
Hypertext Transfer Protocol (HTTP)
The set of rules that controls the transfer of web pages. It is a protocol that allows web browsers to talk to web servers.
Protocols
technical rules governing data communication
Cloud Computing
use of web services to perform functions that were traditionally performed with software on an individual computer; i.e. Flickr, Google Docs, etc.
Office 365
A cloud service built around the office suite of programs
Internet Protocol (IP)
A communication standard that enables computers to route communications traffic from one network to another as needed.
Vint Cerf
Internet pioneer who believed the Internet should be free and available to everyone
DNS lookup
the process of converting a numeric IP address into a text name
Packet Switching
Occurs when the sending computer divides a message into a number of efficiently sized units called packets, each of which contains the address of the destination computer
Packets
segments of messages that contain digital instructions that allow them to reassemble properly at the same time at the destination
Streaming
A method of sending audio and video files over the Internet in such a way that the user can view the file while it is being transferred.
domain name
text version of an IP address
Google docs
a free, Web-based word processor, spreadsheet, presentation, form, and data storage service. It allows users to create and edit documents online while collaborating in real-time with other users.
cloud computing advantages
Accessibility
Cost Saving
Flexibility
Reliability
Portability
Capacity on Demand
Backup/Recovery
Scalability
Availability
cloud computing disadvantages
1. Cloud Computing is dependent on Internet Access.
2. Documents editors are quite basic so they don't have the range of features available in commercial software. I.e. think about Microsoft Word Vs a Google Doc
3. Not good at memory heavy applications such as Video editing. These have to be done on a desktop Computer.
VPN
using the public internet to build a secure, private network connecting distant locations
Virtual Network
A software-based network that exists between devices on a physical network.
VLAN
Virtual Local Area Network
VLANs
Logically separate networks within networks.
Use for a virtual network
To increase security by dividing a physical network into logical networks and limiting access between them

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