Use concrete examples, diagrams and calculations, as needed to explain each of t
ID: 3832431 • Letter: U
Question
Use concrete examples, diagrams and calculations, as needed to explain each of the following (cluster of) concepts involved at the network services layer of (Internet) networking architecture, as well as computing applications that run on top of the network. Each of your answers should be in your own words, no quotations or paraphrasing (unless absolutely necessary, which must then be properly cited and referenced). Application aspects:interactive, SSH,batch, streaming, file transfer, FTP, multimedia,real time, latency, jitter, throughput, loss.
Explanation / Answer
SSH is a cryptographic protocol for operating network services securely over an unsecured network.SSH provide a secured channel over an unsecured network in a client server architecture.SSH was designed to replace Telnet and for unsecured remote shell protocol
Jitter is measuring time difference between in packet inter-arrival time.The sending side transmit packet in a continuos stream and space them evenly.The variation cause problem for audio playback at the receiving side.
Throughpt is the amount of data moved successfully from one place to another in a given perid time.Throughput is controlled by available bandwidth.
FTP is file transfer protocol that is used to transfer files from a server to a client using client server model.FTP is built on a client server model architecture between the client and server.
Latency is the amount of time a message takes to traverse a system.Latency is measured by sending a packet that is returned to the sender,the round trip time consider the latency.
File transfer is the transmission of a computer file through a channel from one computer system to another.
Packet loss occurs when one or more packet of data travelling across a computer network fail to reach their destination.Packet loss is typically caused by network congestion.TCP detects packet loss and perform retransmissin to ensure reliable messaging.
Real time application is an application program that function within a time frame that the user sense as immediate or current .
Streaming media is vedio or audio content sent in compressed form over the internet and played immediately
multimedia is content that uses a a combination of differnet content form such as text,image,audio,video
Batch job is a program that is assigned to the computer to run without user interaction.
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