0
to send error messages
to send control messages
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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
What is icmp?
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]
The ping utility is the most common use of which protocol?
ICMP
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
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.
Is icmp a routing protocol?
No, ICMP is not a routing protocol. ICMP (Internet Control Message Protocol) is used by the Internet Protocol suite (IP) to send error and status messages. It is mainly used for diagnostics. Ping and traceroute are two tools that use ICMP. ICPM is used by routing protocols, for routing advertisements and router discovery.
Is used to relay query messages?
ICMP
What Is used to relay query messages?
ICMP
Protocol used for reporting the error occurred during the datagram transfer is called?
ICMP- Internet Control Message Protocol
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.
What packet is used in ping command?
Packet Internet Groper(PING) is an Internet Control Message Protocol(ICMP) request packet for it's working. ICMP packets are used to check networks are live or not. -- By MYNarutoAnime ----
What port does icmp belong to?
ICMP does not have a port like TCP and UDP.
What protocol is used by traceroot?
Tracert uses ICMP, just like ping does.
Why is it that an ICMP packet does not have source and destination port?
Because ICMP is on the network layer
