The current version of the IPv4 Internet Protocol was first developed in the 1970s, and the RFC 791 standard core protocol governing IPv4 functionality was published in 1981. With the The unprecedented expansion of the Internet In recent years, especially by densely populated countries such as India and China, the impending shortage of address space (availability) was recognized in 1992 as a serious limiting factor to the continued use of the Internet performed over IPv4. Internet Protocol version 6 (IPv6) is the latest revision of the Internet Protocol (IP). It is a communications protocol that provides an identification and location system for computers on networks and routes traffic over the Internet. IPv6 was developed by the Internet Engineering Task Force (IETF) to address the long-overdue problem of IPv4 address exhaustion. IPv6 is set to replace IPv4, which still carries the vast majority of Internet traffic as of 2013. As of late November 2012, the share of IPv6 traffic was reported to be approaching 1%. On the Internet, data is transmitted in the form of network packets. . IPv6 specifies a new packet format, designed to minimize packet header processing by routers. Because the headers of IPv4 packets and IPv6 packets are significantly different, the two protocols are not interoperable. However, in many respects, IPv6 is a conservative extension of IPv4. Most transport and application layer protocols require little or no modification to work over IPv6. IPsec (Internet Protocol Security) was originally developed for IPv6, but found widespread use first in IPv4, for which it was redesigned. IPsec was a mandatory specification of the core IPv6 protocol suite, but has since been made optional. Multicasting is the broadcast... half of the document... to be used to denote a single omitted section of zeros. An example of applying these rules:Starting address: 2001:0db8:0000:0000:0000:ff00:0042:8329After removing all leading zeros: 2001:db8:0:0:0:ff00:42:8329After omitting consecutive sections of zeros: 2001 :db8::ff00:42:8329Because an IPv6 address can have more than one representation, the IETF has issued a proposed standard to represent them in text. The DHCP package contains an Internet Systems Consortium (ISC) DHCP server. First, install the package as superuser:~] # yum install dhcpInstalling the DHCP package creates a file, /etc/dhcp/dhcpd.conf, which is simply an empty configuration file:~]# cat /etc/ dhcp/dhcpd. conf## DHCP server configuration file.# see /usr/share/doc/dhcp*/dhcpd.conf.sampleSample configuration file is available in/usr/share/doc/dhcp/dhcpd.conf.sample.