2.2 Given a scenario, analyze metrics and reports from monitoring and tracking performance tools - Paiet/Tech-Journal-for-Everything GitHub Wiki

2.2 Given a scenario, analyze metrics and reports from monitoring and tracking performance tools

Baseline
- Measuring and analyzing network utilization during regular operation to quantify what is "normal" for the network
- Those metrics are then used to identify and predict issues
Bottleneck
- Slowdowns in performance
  - Installing a 10mbps device on a 100mbps network will slow all of its traffic down to 10mbps
Log management
- Used to sift through all the different log files generated by the OS and other various processes/applications
- Helps determine health/status of devices
- Contains logs like...
  - System Events
  - Security Events
  - Errors
Graphing
- Creates a visual representation of gathered data for ease of data analysis
Utilization
- Bandwidth
  - Discover where bandwidth is being most utilized for optimizing network traffic
- Storage
  - Find out what is utilizing the most storage space and adjust resources to accordingly
    - The reverse is also true
  - See informatics like
    - Total disk size
    - Used/free space
    - Reads/Writes per second
- Network device CPU
  - See CPU utilization in %
    - Counters
      - % User time
      - % Processor time
      - Interrupts
        
        High priority request for CPU
- Network device memory
  - Total memory
  - Allocated/available mem
  - Paged in/out
  - Swap in/out
- Wireless channel utilization
  - Helps you see which channels are being utilized the most and which ones are being underutilized
Link status
- Reports whether or not a link is connected and valid
Interface monitoring
- Usually built-in to a router, switch, or host (server/client)
- Errors
- Utilization
- Discards
- Packet drops
- Interface resets
- Speed and duplex
- Able to be monitored by using SNMP software
  - Alerts can be set for certain triggered conditions