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DNS Server: A DNS server can resolve domain names to IP addresses and vice-versa. When a TCP/IP host is configured with the IP address of a DNS server, the TCP/IP host sends DNS name queries to the DNS server for resolution. A DNS server is required for computers operating in a networked environment. DNS server for a network that consists of a single network segment need not be configured.
WINS Server: A WINS server can store and resolve NetBIOS names to IP addresses. When a TCP/IP host is configured with the IP address of a WINS server, the TCP/IP host registers its own NetBIOS names with the WINS server and sends NetBIOS name queries to the WINS server for resolution. A WINS server is highly recommended when there is more than one network segment in your network and when you have computers that are not based on Active Directory (for example, computers running Windows NT 4.0, Windows 95, Windows 98, and Windows Millennium Edition). WINS server for a network that consists of a single network segment need not be configured.
IPSec: To provide security for TCP/IP, you need to configure Internet Protocol Security (IPSec). IPSec is a framework of open standards for ensuring private, secure communications over Internet Protocol (IP) networks, through the use of cryptographic security services. It provides aggressive protection against private network and Internet attacks through end-to-end security. In Windows XP and the Windows Server 2003 family, IPSec provides the ability to protect communication between workgroups, local area network computers, domain clients and servers, branch offices (which might be physically remote), extranets, and roving clients.
