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MCITP MCSE : Security Specialist Given a remote connectivity scenario, select the appropriate communication approach, protocol, and settings to apply. IP Determine whether the remote access server will use DHCP or a static IP address pool to obtain addresses for dial-up clients. If you use a static IP address pool, determine whether the pool will be ranges of addresses that are a subset of addresses from the IP network to which the server is attached or a separate subnet. If the static IP address pool address ranges represent a different subnet, ensure that routes to the address ranges exist in the routers of your intranet so that traffic to connected remote access clients is forwarded to the remote access server. IPX Internetwork Packet Exchange (IPX) is the traditional Novell communications protocol that sends data packets to requested destinations (such as workstations or servers). An IPX network address is a hexadecimal number, one to eight digits (1 to FFFFFFFE), that identifies a specific network cable segment. IPX network segments can process more than one frame type. Each frame type that is used on the network is treated as a logical network segment and requires its own IPX address—even though each frame type is using the same network board and physical cable segment. PPP Point-to-Point Protocol, is a set of industry-standard framing and authentication protocols that enable remote access solutions to function in a multivendor network. It is recommended that you use PPP because of its flexibility and its role as an industry standard as well as for future flexibility with client and server hardware and software. PPP support enables computers to dial in to remote networks through any server that complies with the PPP standard. PPP also enables remote access clients to use any combination of IPX, TCP/IP, NetBEUI, and AppleTalk. Remote access clients running Windows NT and Windows 2000, Windows 98, and Windows 95 can use any combination of TCP/IP, IPX, and NetBEUI and programs written to the Windows Sockets, NetBIOS, or IPX interface. Microsoft remote access clients do not support the use of the AppleTalk protocol over a remote access connection. PPP standards are defined in Requests for Comments (RFCs), which are published by the Internet Engineering Task Force and other working groups. PPP connection sequence When you connect to a remote computer, PPP negotiation accomplishes the following:   Framing rules are established between the remote computer and server. This allows continued communication (frame transfer) to occur. The remote access server then authenticates the remote user by using the PPP authentication protocols (MS-CHAP, EAP, CHAP, SPAP, PAP). The protocols that are invoked depend on the security configurations of the remote client and server. Once authenticated, if callback is enabled, the remote access server hangs up and calls the remote access client. The Network Control Protocols (NCPs) enable and configure the remote client for the desired LAN protocols.   PPTP Point-to-Point Tunneling Protocol is networking technology that supports multiprotocol virtual private networks (VPNs), enabling remote users to access corporate networks securely across the Internet. Unlike the Point-to-Point Protocol (PPP), which is designed to support a dial-up network connection to the Internet, PPTP does not rely upon a dial-up connection. It can be used to provide secure, tunneled end-to-end Internet connections through other remote access technologies, such as Internet access provided through DSL.