• Performance Enhancements
  • Services Available
  • New Features for Windows Server 2003 TCP/IP
  • Table 1 . Feature Comparison Table for Windows TCP/IP Versions
    		•

    Support for Standard Features




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    Support for Standard Features


    Windows Server 2003 TCP/IP supports the following standard features:

    • Ability to bind to multiple network adapters with different media types

    • Logical and physical multihoming

    • Internal IP routing capability

    • Internet Group Management Protocol (IGMP) version 3 (IP multicasting)

    • Duplicate IP address detection

    • Multiple default gateways

    • Dead gateway detection

    • Automatic Path Maximum Transmission Unit (PMTU) discovery

    • Internet Protocol security (IPsec)

    • Quality of Service (QoS)

    • ATM Services

    • Virtual Private Networks (VPNs) with the Point-to-Point Tunneling Protocol (PPTP) and the Layer Two Tunneling Protocol with IPsec (L2TP/IPsec)

    Performance Enhancements


    In addition, Windows Server 2003 TCP/IP has the following performance enhancements:

    • Protocol stack tuning, including increased default window sizes and new algorithms for high-delay and high-loss links, which increases throughput

    • TCP-scalable window sizes (described in RFC 1323)

    • Selective acknowledgments (SACK) (described in RFC 2018)

    • TCP fast retransmit and fast recovery (described in RFC 2581)

    • Round Trip Time (RTT) and Retransmission Timeout (RTO) calculation improvements

    • Improved performance for management of large numbers of connections

    • Hardware task offload mechanisms including checksum offload and large send offload (LSO)

    Services Available


    The Windows Server 2003 operating system provides the following TCP/IP-related services:

    • Dynamic Host Configuration Protocol (DHCP) client and server and DHCP Relay Agent (with the Routing and Remote Access service)

    • In the absence of a DHCP server, Automatic Private IP Addressing (APIPA) is used

    • Windows Internet Name Service (WINS), a NetBIOS name client and server

    • Domain Name System (DNS) client and server, including support for DNS dynamic updates

    • Dial-up support using the Point-to-Point Protocol (client and server) and Serial Line Internet Protocol (client only)

    • PPTP and L2TP/IPsec, used for remote access and site-to-site VPN connections

    • TCP/IP network printing (client only with the Lpr.exe and Lpq.exe tools)

    • SNMP agent

    • NetBIOS interface

    • Network Location Service

    • Windows Sockets version 2 (Winsock2) interface

    • Remote Procedure Call (RPC) support

    • Network Dynamic Data Exchange (NetDDE)

    • Computer browsing (My Network Places) across IP routers

    • Reliable multicast with the Pragmatic General Multicast (PGM) protocol

    • Basic TCP/IP connectivity utilities, including: finger, ftp, rcp, rexec, rsh, telnet, and tftp

    • Server and client software for simple network protocols, including: Character Generator, Daytime, Discard, Echo, and Quote of the Day

    • Routing Information Protocol (RIP) listener (for Windows XP Professional) and RIP and Open Shortest Path First (OSPF) (with the Routing and Remote Access service)

    • Network Address Translator (NAT) capabilities using either the Internet Connection Sharing (ICS) or the NAT/Basic Firewall routing protocol component of the Routing and Remote Access service

    • Stateful firewalling capabilities using either the Internet Connection Firewall (for Windows Server 2003 with no service packs installed), Windows Firewall (for Windows Server 2003 Service Pack 1), or the NAT/Basic Firewall routing protocol component of the Routing and Remote Access service

    • Multicast forwarding and IGMP router and proxy capabilities with the Routing and Remote Access service

    • TCP/IP management and diagnostic tools, including: arp, ipconfig, nbtstat, netsh, netstat, ping, pathping, route, nslookup, and tracert

    New Features for Windows Server 2003 TCP/IP


    The features and improvements of TCP/IP that are new for Windows Server 2003 include the following:

    • Windows Server 2003, Windows XP with Service Pack 1, and Windows XP with Service Pack 2 now include a production-quality IPv6 protocol stack. For more information about IPv6, see Windows Server 2003 Help and Support Center or the Microsoft Windows IPv6 Web site (http://www.microsoft.com/ipv6).

    • Auto-negotiation of RFC 1323 options (window scaling and TCP timestamps).

    • Default support of network interface cards (NICs) providing large send offload (LSO) and checksum offload.

    • IGMP version 3.

    • Reliable multicast with PGM.

    • Alternate configuration.

    • Automatic determination of the interface-related and default route metrics.

    The table below lists features and the operating system versions that they are present in as a reference. Features are described in more detail throughout this paper.

    Table 1. Feature Comparison Table for Windows TCP/IP Versions


    Product


    Windows 98

    Windows 98 SE

    Windows NT 4.0 SP5

    Windows 2000

    Windows Server 2003

    Dead gateway detection

    Y

    Y

    Y

    Y

    Y

    Fast retransmit/recovery

    Y

    Y

    Y

    Y

    Y

    APIPA

    Y

    Y

    N

    Y

    Y

    Selective ACK (SACK)

    Y

    Y

    N

    Y

    Y

    Jumbo frame support

    Y

    Y

    Y

    Y

    Y

    Large windows

    D

    D

    N

    D

    D

    DNS dynamic update

    N

    N

    N

    Y

    Y

    Media sense

    N

    N

    N

    Y

    Y

    Wake on LAN

    N

    N

    N

    Y

    Y

    IP forwarding

    N

    D

    D

    D

    D

    NAT

    N

    D

    N

    D

    D

    Kerberos v5

    N

    N

    N

    Y

    Y

    IPsec

    N

    N

    N

    Y

    Y

    PPTP

    Y

    Y

    Y

    Y

    Y

    L2TP/IPsec

    N

    N

    N

    Y

    Y

    IP Helper API

    Y

    Y

    Y

    Y

    Y

    Winsock2 API

    Y

    Y

    Y

    Y

    Y

    GQoS API

    Y

    Y

    N

    Y

    Y

    IP Filtering API

    N

    N

    N

    Y

    Y

    Firewall hook

    N

    N

    N

    Y

    Y

    Packet scheduler

    N

    N

    N

    D

    D

    Network location

    N

    N

    N

    N

    Y

    ISSLOW

    Y

    Y

    N

    Y

    Y

    Personal firewall

    N

    N

    N

    N

    D

    Block source routing

    N

    Y

    Y

    Y

    Y

    ICMP Router Discovery

    Y

    Y

    D

    D

    D

    IPsec offload

    N

    N

    N

    Y

    Y

    IGMP v3

    N

    N

    N

    N

    Y

    Reliable multicast (PGM)

    N

    N

    N

    N

    Y

    Alternate configuration

    N

    N

    N

    N

    Y

    Auto-determination of routing metrics

    N

    N

    N

    N

    Y


    Checksum offload

    N

    N

    N

    N

    Y

    Large send offload

    N

    N

    N

    N

    Y

    N=No, Y=Yes, and D=Disabled by Default

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