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Chapter Summary

  • Portable computers quickly followed on the heels of the PCs introduced in the 1980s.

  • A notebook screen is made up of an LCD display.

  • Notebook LCD displays come in two flavors: active matrix and passive matrix.

  • Active matrix screens control the LCD diodes with transistors, making them brighter and crisper than passive matrix screens.

  • The Personal Computer Memory Card International Association developed an expansion card standard for notebook computers. The result, the PC card, provides expansion modules not much bigger than a credit card.

  • A docking station provides an easy way to connect a notebook to the network and increases the functionality of a laptop to nearly desktop status.

  • Remote access servers supply remote clients with the ability to connect to the network using either dial-up or VPN connections. Most network operating systems support remote access.

  • Dial-up connections are controlled by an access protocol such as PPP or SLIP. PPP is now used in most cases and provides encryption and compression for the connection.

  • A Virtual Private Network (VPN) allows remote clients to connect to the LAN over the Internet. The remote connection is accepted by an RAS server configured for VPN.

  • VPN connections are managed by the Point-to-Point Tunneling Protocol (PPTP). This protocol provides an additional layer of encapsulation for the data moved through the VPN tunnel.

  • Dial-up and VPN connections can be monitored and controlled from the RAS server.



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