By Jr. Kenneth C. Mansfield, James L. Antonakos
Designed for the newbie but necessary for the professional, laptop NETWORKING FROM LANS TO WANS: undefined, software program, AND defense offers finished assurance of all features of networking. This publication includes 24 chapters illustrating community and software program, community working structures, multimedia and the net, and desktop and community defense and forensics. Six appendices offer assurance of the historical past of the web, the ASCII code, the operation of MODEMs, tips about turning into qualified in community, protection, and forensics, telecommunication applied sciences, and developing a working laptop or computer fix store. A significant other CD contains a number of movies and documents that permit the reader to accomplish very important hands-on networking, safety, and forensic actions.
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Additional resources for Computer Networking from LANs to WANs: Hardware, Software and Security
Hybrid Networks 27 intermediate nodes if necessary to get to the destination. Like the star connection, the number of links is the same as the number of nodes. The difference is that there is no central hub concentrating the nodes. Data sent between nodes will typically require paths of at least two links. If a link fails, the worst-case scenario requires a message to travel completely around the ring, through every link (except the one that failed). The increase in time required to relay messages around the bad link may be intolerable for some applications.
The fully connected network (also called a mesh network) in Figure 2-3(a) is the most expensive to build, for each node has a Node Hub (concentrator) Communication link (a) Fully connected. (c) Bus. (b) Star. (d) R i ng. Figure 2-3 Network topologies Copyright 2009 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Star Networks 25 link (communication channel) to every other node. Just adding one more node (for a total of six nodes) brings the number of links to fifteen.
A VPN uses public network connections (such as the Internet or the telephone system) to establish private Copyright 2009 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. 24 Chapter 2 communication by encrypting the data transmitted between the two computers at each end of the connection. The data travel in tunnels, logical connections between the nodes of the VPN. Finally, special switches are available that allow virtual LANs (VLANs) to be created.