By Margaret Levine Young
Utilize all of the web has to provide with aid from this complete advisor. how you can get attached, pick out an online merchant (ISP) and net browser, ship electronic mail, chat, use plug-ins, buy items accurately, locate lots of beneficial and enjoyable details on-line -- even create your personal online page.
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Many companies are reworking their companies throughout the improvement of data and communications applied sciences. the protection of this e-commerce is now a key enabler for companies and this booklet offers an summary of present and destiny infrastructures for e-business together with XML safety mechanisms and subsequent new release Public Key Infrastructures (PKI), in addition to electronic archiving and instant protection that's set to be a major development quarter with the whole rollout of 3G cellular networks.
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Additional info for Internet: The Complete Reference
Unpacking TAR Archive Files . . . . . . . . . . . . Decoding and Decompressing Macintosh Files . . . . . Installing Programs . . . . . . . . . . . . . . . . . . . . 786 788 789 791 793 795 796 796 798 799 805 805 808 Index. . . . . . . . . . . . . . . . . . . . . . 811 Acknowledgments he authors would like to thank Megg Morin, Scott Rogers, Tana Allen, Laura Stone, Jan Jue, Paul and Linda Medoff, Valerie Perry, Lyssa Wald, Michael Mueller, the entire Production team, and many others at McGraw-Hill/Osborne for making this book happen.
When you are on the road and you need to connect to a computer at your office, VPN is the way to make the connection. To connect to a LAN through a firewall, the firewall must support Point-to-Point Tunneling Protocol (PPTP), which lets VPN connect you through the firewall. Your organization’s LAN administrator sets up a VPN server, the program on the LAN that provides PPTP. Both the VPN client (the computer making the connection) and the VPN server must have Internet connections. See the section on connecting to an organization’s LAN using VPN in Chapter 3 for how to configure your computer to make the connection.
You do not want outsiders to be able to use this port, so you may want to block anyone on the Internet from accessing port 139. A firewall controls which ports are open, refusing to respond to packets addressed to other ports. Some firewalls enable you to specify what types of packets can cross the firewall—for example, requests for web pages might be allowed outgoing, but not incoming. Some firewalls control only incoming information. For example, Windows ME and XP come with the Internet Connection Firewall (ICF), described in Chapter 3.