Tag - Google

Why First Ping request timed out


I have a strange issue where the first ping always times out and connection to the internet is fine. I connect a PC to one of the FastEther ports and I am able to ping the router without any issues. However, the moment I ping an external website i.e. ping www.google.com the first ping request fails. after that the following request come through quickly.



A Cisco router has a default timout of 5 seconds, when you send a ping request and you recieve . instead of ! , this doesnt necessarly mean the packet is not transmited at all , it just means there is no reply to those packets and some time it could be due to a delay higher than those 2 second

If you are pinging a website. This means we first have to get a DNS resolution then ARP resolution and once these are in order we should be able to ping. If the first ping fails that means the first 2 steps are taking longer than expected.

Application Layer

Application Layer enable the user, whether human or software, to access the network. It provides user interfaces and support for services such as electronic mail,file access and transfer, access to system resource, surfing the world wide web, and network management.

Application layer is Responsible for Providing Services to the user.

  • Application Layer is a term used in categorizing protocols and methods in architectural models of computer networking. Both the OSI model and the Internet Protocol Suite (TCP/IP) define application layers.



 OSI  Model


  • Application Layer do Interaction (Providing Services to the user)
  • 80% Application on internet do interact
  • i.e  google.com —–> will auto —–>  www.google.com ——> Here www intract  on port 80
  • i.e  for buy house property dealer do interact

Application Layer Protocols

Copyright ©2010 -  2019 Ciscoforall.com | Privacy Policy