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Configuring Windows 7 (Training Kit) - Part 37

Configuring Windows 7 (Training Kit) - Part 37. This training kit is designed for IT professionals who operate in enterprise enviroments that use Windows 7 as a desktop operating system. You should have at least one year of experience in the IT field, as well as experience implementing and administering any Windows client operating system in a networked environment. | The Advantages of IPv6 IPv6 was designed to overcome the limitations of IPv4. The main advantages that IPv6 has over its predecessor are as follows Increased address space IPv6 provides sufficient addresses for every device that needs to have a unique public IPv6 address. In addition the 64-bit host portion interface ID of an IPv6 address can be automatically generated from the network adapter hardware. Automatic Address Configuration Typically IPv4 is configured either manually or by using DHCP. Automatic configuration autoconfiguration through APIPA is available for isolated subnets that are not routed to other networks. IPv6 deals with the need for simpler and more automatic address configuration by supporting both stateful and stateless address configuration. Network level security Communication over the Internet requires encryption to protect data from being viewed or modified in transit. Internet Protocol Security IPSec provides this facility and IPv6 makes IPSec mandatory. Real-time data delivery Quality of Service QoS exists in IPv4 and bandwidth can be guaranteed for real-time traffic over a network but not when an IPv4 packet s payload is encrypted. Payload identification is included in the Flow Label field of the IPv6 header so payload encryption does not affect QoS operation. Routing table size On the IPv6 Internet backbone routers have greatly reduced routing tables that use route aggregation which permits a number of contiguous address blocks to be combined and summarized as a larger address block. Header size and extension headers IPv4 and IPv6 headers are not compatible and a host or router must use both IPv4 and IPv6 implementations to recognize and process both header formats. Therefore the IPv6 header was designed to be as small as was practical. Nonessential and optional fields are moved to extension headers placed after the IPv6 header. Removal of broadcast traffic IPv4 relies on ARP broadcasts to resolve the MAC addresses of the network .