Skillset can help you prepare! Sign up for your free Skillset account and take the first steps towards your certification.
At which layer of the OSI Model does ICMP operate?
Layer 4
Layer 2
Layer 3
Layer 7
As per RFC 792, ICMP or Internet Control Message Protocol Ðuses the basic support of IP as if it were a higher level protocol, however, ICMP is actually an integral part of IP, and must be implemented by every IP moduleÓ. Network Layer is the Layer 3 of the OSI Model. One of Layer 3s functions is internetworking which involve logical addressing or Internet Protocol Addressing. Ping differs with ICMP as ping or Packet Internet Groper is a utility (Application, Layer 7) used for testing connectivity between internetworked devices. ICMP message types (echo reply, destination unreachable, etc.) are what ping utility uses to determine reachability of a target host. (http://tools.ietf.org/html/rfc792)
Study thousands of practice questions that organized by skills and ranked by difficulty.
Create a tailored training plan based on the knowledge you already possess.
Know when you’re ready for the high-stakes exam. Have the confidence that you will pass on your first attempt.