[1Day-1CS] Bottlenecks, classification and analysis of networks

Bottleneck

A situation where the performance or capacity of an entire system is limited by one component.

• Caused by high traffic when opening events on the server and not well managed

• Requires information about the network topology to properly troubleshoot bottlenecks

• The main causes of bottlenecks

  • Network bandwidth

  • Network topology

  • Server CPU, memory usage

  • Inefficient network configuration

Categorize your network

Networks are categorized based on size

• Local Area Network (LAN)

  • Local Area Network

  • Fast and uncongested transmission speeds

• Metropolitan Area Network (MAN)

  • Metropolitan area network

  • Transmission speed is average, more congested than LAN

• Wide Area Network (WAN)

  • Wide area network

  • Slower transmission speed, more congested than MAN

Network Performance Analysis Commands

• ping

  • Sends a certain size packet to the target node whose status you want to check

• netstat

  • Displays the network status of connected services

  • netstat * Shows a list of network connections, routing tables, network protocols, etc.

• nslookup

  • Used to look up DNS-related content

• tracert (traceroute)

  • Used to verify the network route to the destination node

  • Can be used to see where response times are slowing down, etc.

• Many other commands exist and use programs like wireshark, netmon, etc.