2 2 1.1.2 Deploy More Recent Technologies After (Cpanel web hosting)
2 2 1.1.2 Deploy More Recent Technologies After IPv4 was specified 20 years ago, we saw many technical improvements in networking. IPv6 covers a number of those improvements in its base specification, allowing people to assume that these features are available everywhere, anytime. Recent technologies include, but are not limited to, the following: Autoconfiguration With IPv4, DHCP is optional. A novice user can get into trouble if visiting an offsite without a DHCP server. With IPv6, the stateless host autoconfiguration mechanism is mandatory. This is much simpler to use and manage than IPv4 DHCP. RFC 2462 has the specification for it. Security With IPv4, IPsec is optional and you need to ask the peer if it supports IPsec. With IPv6, IPsec support is mandatory. By mandating IPsec, we can assume that you can secure your IP communication whenever you talk to IPv6 peers. Friendly to traffic engineering technologies IPv6 was designed to allow better support for traffic engineering such as diffserv1 or RSVP2. We do not have single standard for traffic engineering yet; so the IPv6 base specification reserves a 24-bit space in the header field for those technologies and is able to adapt to coming standards better than IPv4. Multicast Multicast support is mandatory in IPv6; it was optional in IPv4. The IPv6 base specifications extensively use multicast on the directly connected link. It is still questionable how widely we will be able to deploy multicast (such as nationwide multicast infrastructure), though. Better support for ad hoc networking Scoped addresses allow better support for ad hoc (or zeroconf ) networking. IPv6 supports anycast addresses, which can also contribute to service discoveries. 1.1.3 A Cure to Routing Table Growth The IPv4 backbone routing table size has been a big headache to ISPs and backbone operators. The IPv6 addressing specification restricts the number of backbone routing entries by advocating route aggregation. With the current IPv6 addressing specification, we will see only 8,192 routes in the default-free zone. 1. diffserv: short for differentiated services. It is an IETF standard that classifies packets into a couple of classes and performs rough bandwidth/priority control. 2. RSVP: an IETF standard for bandwidth reservation.
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