Networks
Attributes of network connection
Latency — the time it takes for data (a packet) to travel from one point to another. It consists of multiple components:
- Queueing delay
- Propagation delay
- Processing delay
Bandwidth — the amount of data that can be transmitted in a fixed period of time (measured in bits-per-second (bps), Kbps, Mbps, Gbps.
Throughput — the actual amount of data that is successfully sent/received over a link during a second (Kbps, Mbps, Gbps)
Internet protocol stack
- Application: supporting network application (FTP, SMTP, HTTP)
- Transport: process-to-process data transfer (TCP, UDP)
- Network: routing datagrams from source to destination (IP, routing protocols)
- Link: data transfer between neighboring network elements
- Physical: bits transfer through the wire
Standard Ports