protocol that has been modified in version 6 of the TCP/IP protocol suite is
ICMP (ICMPv6). This new version follows the same strategy and purposes of
version 4. ICMPv4 has been modified to make it more suitable for IPv6. In
addition, some protocols that were independent in version 4 are now part of
Internetworking Control Message Protocol (ICMPv6).
and IGMP protocols in version 4 are combined in ICMPv6. The RARP protocol is
dropped from the suite because it was rarely used and BOOTP has the same
functionality. Just as in ICMPv4, we divide the ICMP messages into two
categories. However, each category has more types of messages than before.