Rechnernetze & verteilte Systeme Prüfungsübung

The time it takes for a signal to travel from one end of a physical medium to the other, at the speed of light in that medium.

The time it takes to push all the packet's bits into the wire, which depends on the packet's length and the link's bandwidth.

The time it takes for a router to process the packet header and determine where to forward the packet, along with various checks such as error detection.

The time a packet spends waiting in queue before it can be transmitted on the link. It can vary wildly depending on the queue's length and the network's congestion level.

There are four types of commonly identified delays:

• Queueing
• Processing
• Transmission
• Propagation

GET is used to request data from a specified resource.

POST requests that a web server accepts the data enclosed in the body of the request message, most likely for storing it. It is often used when uploading a file or when submitting a completed web form.

DELETE is a method used to remove or delete a resource from a server. It is commonly used to instruct the server to delete a specific resource identified by the provided URL or resource identifier.

PUT is used to send data to a server to create/update a resource.

HEAD method simply returns metadata about a resource on the server. This HTTP request method returns all of the headers associated with a resource at a given URL, but does not actually return the resource.

PATCH method is a request method in HTTP for making partial changes to an existing resource. The PATCH method provides an entity containing a list of changes to be applied to the resource requested using the HTTP Uniform Resource Identifier (URI).

CONNECT method requests that a proxy establish a HTTP tunnel to a destination server, and if successful, blindly forward data in both directions until the tunnel is closed.

OPTIONS method requests permitted communication options for a given URL or server. This can be used to test the allowed HTTP methods for a request, or to determine whether a request would succeed when making a CORS preflighted request

TCP meaning Transmission Control Protocol, is a communications standard for delivering data and messages through networks. TCP is a basic standard that defines the rules of the internet and is a common protocol used to deliver data in digital network communications.

User Datagram Protocol (UDP) refers to a protocol used for communication throughout the internet. It is specifically chosen for time-sensitive applications like gaming, playing videos, or Domain Name System (DNS) lookups.

Real-time Transport Protocol (RTP) is a network standard designed for transmitting audio or video data that is optimized for consistent delivery of live data.

Real-Time Transport Control Protocol (RTCP) is a network communication protocol that works alongside Real-Time Protocol (RTP) to monitor and track data delivery on large multicast networks via RTP's associated transmission metrics.

Real-Time Transport Protocol (RTP) and Real-Time Control Protocol (RTCP) are used in combination making it possible to monitor data delivery for large multicast networks. RTP carries the media streams, while RTCP is used to monitor transmission statistics and quality of service (see QoS).