Question: What Port Is ICMP?

Does ICMP use a port?

ICMP has no concept of ports, as TCP and UDP do, but instead uses types and codes.

Commonly used ICMP types are echo request and echo reply (used for ping) and time to live exceeded in transit (used for traceroute)..

What layer is ICMP traffic?

ICMP (Internet Control Message Protocol) is located at the Network layer of the OSI model (or just above it in the Internet layer, as some argue), and is an integral part of the Internet Protocol suite ( commonly referred to as TCP/IP).

What is the port for ping?

So, technically, ping has no port. In short, ping doesn’t use TCP/IP (which has ports). Ping uses ICMP, which doesn’t have ports.

What is the main function of ICMP?

The primary purpose of ICMP is for error reporting. When two devices connect over the Internet, the ICMP generates errors to share with the sending device in the event that any of the data did not get to its intended destination.

What is ICMP error message?

ICMP (Internet Control Message Protocol) is an error-reporting protocol that network devices such as routers use to generate error messages to the source IP address when network problems prevent delivery of IP packets.

Is ICMP a Layer 3?

Therefore, in the topic on TCP/IP-based layered network, ICMP is shown as a layer 3 protocol.

What is the role of ICMP?

ICMP is a network level protocol. ICMP messages communicate information about network connectivity issues back to the source of the compromised transmission. It sends control messages such as destination network unreachable, source route failed, and source quench.

What layer is TCP on?

TransportTCP/IP Protocol Architecture ModelOSI Ref. Layer No.OSI Layer EquivalentTCP/IP Protocol Examples4TransportTCP, UDP3NetworkIP, ARP, ICMP2Data linkPPP, IEEE 802.21PhysicalEthernet (IEEE 802.3) Token Ring, RS-232, others1 more row

What is port number of ICMP?

… someone says ICMP uses Port 7. Port 7 (both TCP and UDP) is used for the “echo” service. If this service is available on a computer, UDP port 7 could be used instead of ICMP to perform a “ping”.

Why ICMP has no port number?

The ICMP packet does not have source and destination port numbers because it was designed to communicate network-layer information between hosts and routers, not between application layer processes.

What are 5 types of errors handled by ICMP messages?

ICMP uses the source IP address to send the error message to the source (originator) of the datagram. Five types of errors are handled: destination unreachable, source quench, time exceeded, parameter problems, and redirection (see figure1).

Are ports layer 3 or 4?

TCP or UDP ports are defined in either layer 4 of the OSI model or layer 3 of the TCP/IP model, both are defined as the ‘transport’ layer. OSI layer 5 ‘session layer’ uses the ports defined in layer 4 to create sockets and sessions between communicating devices/programs/etc.

What port is ICMP echo request?

port 7On 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 …

How do I send an echo ICMP?

To send an ICMP echo request packet to the IP address that you specify: Issue the ping command in Privileged Exec mode….The following characters can appear in the display after issuing the ping command:! … . … ? … A—Address mask request message.a—Address mask reply message.D—Router discovery advertisement message.More items…•Aug 13, 2014

Does ICMP use IP?

ICMP uses the basic support of IP as if it were a higher-level protocol, however, ICMP is actually an integral part of IP. … ICMP is a network-layer protocol. There is no TCP or UDP port number associated with ICMP packets as these numbers are associated with the transport layer above.

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