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MCSE: Windows 2000 Exams in a Nutshell by Paul Murphy, Michael Moncur

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Internet Connectivity

NAT (Network Address Translation)

Translation: Translates between public and private IP addresses
IP address assignment: Includes a simple DHCP server and can assign IP addresses to clients; uses private IP addresses
DNS name resolution: Acts as a DNS server; forwards DNS requests to an Internet DNS server and returns the results to clients

Internet Connection Sharing (ICS)

Simplified version of NAT
Uses a single checkbox rather than complex configuration information
Uses a fixed range of private IP addresses
Allows only one public IP address
Can only be used on one internal LAN interface

Proxy Server 2.0

Provides security based on individual users, nodes, or Internet addresses
Caches HTTP and FTP requests
Supports networks that span multiple subnets or locations
Integrates with Active Directory
Provides user-based and site-specific security

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