no
None did. This sort of communication is an evolution of the prehistoric animals that are the ancestors of those who CAN echo.
Your mother
Bats
· An echo is a reflection of sound waves when they hit upon any obstacle in their path. · This property of sound is employed by many animals,birds,insects and of course,humans.Bats are the most famous ones to use echo for catching food. · The property echo is extensively used by submarines and undersea explorations.
To locate prey.
becoz they need to be heard
I do not have any red echo shoes.
A useful echo is echolocation, which is used by marine animals such as dolphins to locate and then hunt their prey
Echo is a program. '' is not a program. '' does not perform any action. Echo returns what you type. '' does not.
There really is no "port" for icmp but there is a icmp code. If you are looking for the icmp code for echo-reply it is 0 and the echo is 8 For an access list you could do the following: permit icmp any any echo-reply permit icmp any any echo Or the same using the icmp code permit icmp any any 0 permit icmp any any 8
they use it to find food/communicate with each other
actually an echo does not have any speed . it travels at zero speed