What does the ICMP echo request display?
Internet Control Message Protocol (ICMP) is one of the protocols of the TCP/IP suite. The ICMP echo request and the ICMP echo reply messages are commonly known as ping messages. The ping command sends an ICMP echo request to a device on the network, and the device immediately responds with an ICMP echo reply.
Is echo an ICMP?
What is the difference between ICMP echo and Echo Reply?
The Echo Request simply means that the host to which it is addressed should reply to the packet. The Echo Reply is the ICMP message type that should be used in the reply. The Request includes some data, which can be specified by the ping command; whatever data is sent in the Echo Request is sent back in the Echo Reply.
What port is ICMP echo request?
On various routers, this TCP or UDP port 7 for the Echo Protocol for relaying ICMP datagrams (or port 9 for the Discard Protocol) is also configured by default as a proxy to relay Wake-on-LAN (WOL) magic packets from the Internet to hosts on the local network in order to wake them up remotely (these hosts must also …
What does Echo Reply mean?
An echo-reply is a response to a ping. So you can have an ACL that allows an “echo” (meaning you can initiate the ping) while blocking “echo-replies” meaning it won’t alloow you to respond to one.
How to send ICMP echo request to another computer?
If a person at a computer wants to test the Layer 3 network connectivity to another computer (located locally or remotely), he can use network troubleshooting tools like Ping, Traceroute/Tracert, Pathping etc., to generate and send ICMP Echo Request messages to other computer.
When does Ping stop in ICMP echo request?
Show version and exit. Specify a timeout, in seconds, before ping exits regardless of how many packets have been sent or received. In this case ping does not stop after count packet are sent, it waits either for deadline expire or until count probes are answered or for some error notification from network.
What is the data payload of ICMP echo?
Data payload of ICMP Echo Request packet is used for padding, using ASCII characters. ICMP Echo Reply packet must have the same data payload as the ICMP Echo request.
How many packets are captured in an ICMP request?
Total numbers of packet captured are 8, 4 for request and 4 for reply between the source and destination machine. The 1st packet is sent by source machine is ICMP echo request and if you look by the given below image, you will observe highlighted text is showing ICMP query code: type 8 echo ping request.