0
ICMP is the "internet Control Message Protocol". ICMP packets are small packets used in local networks and on the Internet, most typically, for network troubleshooting and problem location. ICMP may be used for reporting the route packets are taking to reach an arbitrary destination either locally or on the Internet or to determine if a particular local or Internet connected device is reachable and/or responding.
Various operating systems make use of the ICMP protocol for the above mentioned purposes via utilities such as 'traceroute' and 'ping' in the UNIX/Linux world, or 'tracert' and 'ping' in the Windows world.
[JMH]
Wiki User
∙ 16y ago
Wiki User
∙ 12y agoInternet Control Message Protocol.
Protocol to ensure internet connection between two PC
Add your answer:
Earn +20 pts
Why is it that an ICMP packet does not have source and destination port?
Because ICMP is on the network layer
Which ICMP message contain part of the ip datagram?
All ICMP Error Messages
The ping utility is the most common use of which protocol?
ICMP
What is ICMP used for?
to send error messages to send control messages
Why doesnt the netstat command display any information about ICMP connections?
Netstat will display statistics for ICMP such as Packets Sent and Received Try netstat -s ICMP messages arent data packets that are usable by a computers user but by the OS itself, they indicated issues with connectivity in response to requests that are being sent from the computer. For example your computer requests a web page from a particular IP address, if your router is unable to establish a connection to that it will send an ICMP message back to your computer to let it know why. Common messages that get sent are: Echo reply (Ping) Echo request (Ping) Destination Unreachable Netstat monitors TCP\UDP ports on the computer to monitor connections to the machine, ICMP is a lower level prototcol (IP) and hence doesnt maintain connections or actively listen for ICMP packets
Which port is used by ICMP?
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
What port is used for icmp echo re quest?
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
What port does icmp belong to?
ICMP does not have a port like TCP and UDP.
Why is it that an ICMP packet does not have source and destination port?
Because ICMP is on the network layer
Which ICMP message contain part of the ip datagram?
All ICMP Error Messages
Where the icmp request are originated?
icmp request is orginated on the OSI network layer with ip protocol.
Why filtering ICMP traffics by ACLs is not advised?
Because ICMP traffic, notably ICMP ECHO REQUEST-0 and ECHO REPLY-8 are used in network diagnostic sequences.
Which protocol should be allowed when not able to ping a remote device residing behind a firewall?
ICMP is the internet control access protocol . ICMP is the plrotocol that should be allowed when not able to ping a remote device residing behind a firewall. ICMP is the protocol of network layer.
What is the response if a host sends a ICMP to a default gateway?
If devices on a network are properly configured, a host sending ICMP to a default gateway must receive a reply. ICMP simply means ping.
What transport layer protocol does ping use?
Assuming IPv4 ICMP. Ping uses IP for transport. Ping in itself is an "Echo Request", which is a function of the ICMP protocol. The IP Packet will carry the ICMP protocol from end-to-end. ICMP has a protocol number of 1, so the "Protocol" field in the IPv4 header will contain "1" as a reference to the ICMP payload. For IPv6, ICMPv6 is used, and the transport will be IPv6.
Does ICMP operate at the Transport layer?
no
What is incoming icmp?
Ping request
