Knowledgebase
What causes latency?
Posted by Gunnar Þór Jónsson on 08/04/2013 16:36
Question
 

What causes latency?

 
 Answer
 

Latency is the delay caused by sending and receiving a response from a remote host. It is normally measured in milliseconds (thousandths of a second). Higher latency times can decrease performance in applications such as:

  • on-line interactive games.
  • browsing web pages with high graphic content
  • on-line interactive videos/tutorials . 

You can identify a latency issue using the ping or traceroute command via the command prompt window. When a software firewall (such as the ) is installed, increased packet times are expected as it monitors network traffic. To increase performance disabling the firewall may improve the delay of network transmission. It may be advantageous to create an advanced firewall rule and allow all protocols (TCP, UDP, ICMP, AND IP) in both incoming and outgoing network traffic. You will need to know the IP address and ports required for the application to run properly through the firewall which can be determined by the support personnel of the software. Other issues which may resolve latency issues include:

  • updating the USB drivers for your cable modem
  • updating drivers for your network card
  • replacing a loose or defective cable line to your modem
  • Disabling/Uninstalling any unnecessary network components (such as File and Printer Sharing for Microsoft Networks, Client Service for NetWare, NetBEUI Protocol, etc...) which can be found by right-clicking the network connection icon and going to its properties.

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