An IP address is used to identify computers on the Internet. It works like a return address would on a piece of mail. When your computer or device sends a request, like a search on Google, it tags the request with your IP address. That way Google knows where to send the response.

A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted internal network and untrusted external network, such as the Internet.

HTTP is the underlying protocol used by the World Wide Web and defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands.

A computer language that uses tags to define elements within a document. It is human-readable, meaning markup files contain standard words, rather than typical programming syntax. XML is called the “Extensible Markup Language” since custom tags can be used to support a wide range of elements.

A markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. 

Providing a map with live tracking of vehicles is possible thanks to the SIRI-VM feed. SIRI -VM can also include further information about upcoming stops, such as the vehicle’s ETA.

A feed for the estimated time of arrival of a vehicle to a particular stop. SIRI-SM can also include further information about vehicles such as the vehicle’s location.

A WAF filters, monitors, and blocks HTTP traffic to and from a web application. A WAF is differentiated from a regular firewall in that a WAF is able to filter the content of specific web applications while regular firewalls serve as a safety gate between servers.

An isolated network of computers using existing infrastructure, such as a Local Area Network (LAN) or Wide Area Network (WAN or Internet) to securely connect to each other. When you use a public WiFi network, for instance, your device and data are theoretically accessible by everyone else on the network. When using a VPN, you’re still able to access the internet through the public network, but are shielded by the VPN. 

The UK national standard for exchanging bus schedules and related data. It is used for:

• the electronic registration of bus routes
• the Traffic Area Network
• the exchange of bus routes with other computer systems such as journey planners and vehicle real-time tracking systems.

www.gov.uk/government/collections/transxchange