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 CCNA interview questions  CCNA Interview Questions
 CCDA interview questions  CCDA Interview Questions
Question
How ICMP is used in ping and traceroute facilities
 Question Submitted By :: Vini
I also faced this Question!!     Rank Answer Posted By  
 
  Re: How ICMP is used in ping and traceroute facilities
Answer
# 1
Internet Control Message Protocol (ICMP) pings and 
traceroute on the PIX Firewall are handled differently 
based on the version of PIX and ASA code.

Inbound ICMP through the PIX/ASA is denied by default. 
Outbound ICMP is permitted, but the incoming reply is 
denied by default.

** ASA/PIX does not support ICMP redirects, because it does 
not support asymmetric routing
 
Is This Answer Correct ?    3 Yes 0 No
Partha
 
  Re: How ICMP is used in ping and traceroute facilities
Answer
# 2
it is used in finding out the error message like if data 
gram is not reaching to the destination.It is reliable 
protocol as compared to Internet protocol.
 
Is This Answer Correct ?    2 Yes 0 No
Sachin
 
 
 
  Re: How ICMP is used in ping and traceroute facilities
Answer
# 3
ICMP works on 
echo-request n echo-reply

in network communications devices echo-request/reply's open 
open in network security devices echo-request/reply is 
close as inbound traffic is restricted by default.

so by this process of echo-request n echo-reply the PING 
and traceroute works and gives the information that the 
channel is established.
 
Is This Answer Correct ?    0 Yes 0 No
Hasan
 

 
 
 
Other CCNA Interview Questions
 
  Question Asked @ Answers
 
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You have two Cisco routers setup back-to-back in a lab using DTE/DCE cables. To which router would you add the clockrate command? A.) The serial port on the DCE router B.) The Ethernet port on the DTE router C.) The Ethernet port on the DCE router D.) The serial port on the DTE router  1
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How do you find the parameters that you can use with the SHOW command? A.) ? show B.) show ? C.) debug show D.) help E.) sh?  1
What is the command to manually enter a static route? A.) IP route network B.) IP route C.) IP route < destination network> D.) IP route  1
What key do you use to view the last command? A.) Ctrl+X B.) Ctrl+Z C.) Ctrl+E D.) Ctrl+P  1
Which three of the following are true statements about connection-oriented sessions? A.) The segments delivered are acknowledged back to the sender upon their reception B.) Any segments not acknowledged the are retransmitted by the receiver C.) A manageable data flow is maintained in order to avoid congestion, overloading and loss of any data D.) Segments are sequenced back into their proper order upon arrival at their destination  1
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