ARP and ICMP

Start with address resolution

Begin with the mind map on ARP and address resolution. It introduces the mapping of internet addresses to physical addresses and includes material on resolution for IPv6. Follow it with the ARP mind map, which covers ARP requests and how a router learns the data-link address of an IP host connected to a LAN.

The ARP message mind map adds detail about how an ARP message is carried in an Ethernet frame. It also notes that there is no IPv4 header. Reading these maps in order gives you material to study before moving to the questions.

Study ICMP messages

The ICMP mind map describes ICMP as a messaging service provider for IP. It covers messages carried as IP datagrams, information about network problems, and common events and messages associated with ICMP.

The ICMP flashcard deck offers another way to study the topic. Its prompts include normal ICMP error messages, when ICMP traffic should not be sent, and malicious uses of ICMP. Use the map for an overview, then work through the cards to practice recalling details.

Check your understanding

Network Layer Protocol Headers is a flashcard deck with questions on ARP and its header. The quiz on support protocols and technologies asks about mapping protocol addresses to hardware addresses and about an ICMP error message for an incorrect destination IP address.

After taking the quiz, return to the relevant mind map or flashcard deck to study any question you found difficult. Then use the questions again as a check on what you remember.

Place the topic in the unit

ARP and ICMP is a section of Network, Transport and Application Layer Protocols in Networks and telecommunications. The maps, cards and quiz offer different ways to study the address-resolution and messaging material listed in this section.

Choose a map to begin, then try the quiz when you are ready.