b. Only a single public IP address is required, although more than one can be used.

c. 209.68.11.152 is not a reserved private IP address. The other addresses listed fall into one of the reserved ranges.

a, b, d. DHCP, NAT, and ICS can assign IP addresses. DNS (choice c) is used to resolve names and addresses.

a, b. Proxy servers offer advanced filtering options and support for caching. Improved speed (choice c) and support for new protocols (choice d) are advantages of IP filtering over a proxy.

b. Use the Require Security (Secure Server) option for maximum security.

b. RIP v2 is new to Windows 2000. RIP v1 and OSPF (choices a and c) are supported by earlier versions of Windows NT; L2TP (choice c) is not a routing protocol.

b, d. Windows NT Server and Windows 2000 Server can act as DHCP servers.

b. Superscopes allow multiple, non-consecutive pools of IP addresses to be treated as a single scope.

a, c. DHCP relay can be used to forward DHCP requests between subnets. Many hardware routers also support this feature.

d. Windows 2000 supports up to 12 WINS server addresses.

b. Proxy Server 2.0 is a separate product and is not included with Windows 2000 Server.

a, b. Although limited, NAT acts as a DNS and DHCP server.

c. The special ports feature allows you to configure a machine with a private IP address to be accessible from the Internet as a web server.

a. The Web Publishing feature of Proxy Server allows you to make an internal server available over the Internet.

b, c. The RIP v2 and OSPF routing protocols support router authentication.

c. Five PPTP or L2TP ports are supported by default in Routing and Remote Access.

c. When a router is used for Internet connectivity, each machine that will access the Internet requires a public IP address. The other solutions listed use private addressing.

a. The PTR record is updated by the DHCP server. The A record (choice b) is updated directly by the client running Windows 2000 Professional.

c. Active Directory integrated zones are available only in Windows 2000.

c. MPPE (Microsoft Point-to-Point Encryption) is used to encrypt traffic on PPTP VPNs.

b, d. ICS does not support incoming connections or multiple subnets. It can support non-Windows clients (choice a) and Windows 98 clients (choice c).

c. Proxy Server 2.0 would be the best choice, because it supports advanced security features and can filter Internet access by clients.

b. Because Proxy Server does not handle IP addressing, you would need to use DHCP to allocate IP addresses.