Table 2-2 Key TCP/IP enhancements for IPv6Įxtends the Dynamic Host Configuration Protocol (DHCP) client to support IPv6 and allows stateful address autoconfiguration with a DHCPv6 server.Īllows use of Internet Key Exchange (IKE) and data encryption for IPv6. Provides application programming interfaces (APIs) for extending the TCP/IP filtering architecture so that it can support additional features. Helps determine whether a performance bottleneck for a connection is the sending application, the receiving application, or the network. Provides correction for sudden, temporary increases in retransmission timeouts and prevents unnecessary retransmission of segments. Spurious Retransmission Timeout Detection Makes it possible to use SACK information to perform loss recovery when duplicate acknowledgments have been received and to more quickly recover when multiple segments are not received at the destination. Prevents unwanted forwarding of traffic between interfaces by associating an interface or a set of interfaces with a login session that has its own routing tables. Optimizes TCP transfers for the host receiving data by automatically managing the size of the memory buffer (the receive windows) to use for storing incoming data based on the current network conditions. Provides an extensible framework that helps users recover from and troubleshoot problems with network connections. Neighbor Unreachability Detection for IPv4ĭetermines when neighboring nodes and routers are no longer reachable and reports the condition. Provides faster throughput by altering the way that a sender can increase the sending rate if multiple segments in a window of data are lost and the sender receives an acknowledgment stating that only part of the data has been received. This helps the receiver determine when it has retransmitted a segment unnecessarily and adjust its behavior to prevent future retransmissions.
Optimizes TCP transfers for the sending host by increasing the amount of data sent in a connection while ensuring that other TCP connections are not affected.Įxtends the way Selective Acknowledgments (SACKs) are used, enabling a receiver to indicate up to four noncontiguous blocks of received data and to acknowledge duplicate packets. Prevents TCP connections from terminating due to intermediate routers silently discarding large TCP segments, retransmissions, or error messages.Įnsures that an unreachable gateway is checked periodically to determine whether it has become available. Table 2-1 Key TCP/IP enhancements in the Next Generation TCP/IP stack Table 2-2 summarizes the key TCP/IP enhancements that are specific to IPv6. Table 2-1 summarizes the key TCP/IP enhancements implemented in the Next Generation TCP/IP stack. The modified IP architecture is referred to as the Next Generation TCP/IP stack.
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When networking hardware is detected during installation of the operating system, both IPv4 and IPv6 are enabled by default in Windows Vista and later and you don’t need to install a separate component to enable support for IPv6. IPv6 has 128-bit addresses and is the next-generation version of IP. IPv4 has 32-bit addresses and is the primary version of IP used on most networks, including the Internet.
IPv4 and IPv6 are used in very different ways. Since the introduction of Windows Vista and Windows Server 2008, Windows has had a dual IP layer architecture in which both Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6) are implemented and share common Transport and Frame layers.
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The TCP and IP protocols make it possible for computers to communicate across various networks and the Internet using network adapters, including network-interface cards, USB-attachable network adapters, PC Card network adapters, or built-in adapters on the motherboard.
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