Networking: A Beginner’s Guide Fifth Edition- P34 pdf

... are potentially the most dangerous overall. Such people have many advantages that some random cracker won’t have. They know the important user names on the network already, so they know what ... such as between a local area network (LAN) and the Internet. Firewalls can use many different techniques to enforce security policies. N A proxy server acts as a proxy (an anonymous intermed...

Ngày tải lên: 05/07/2014, 04:20

... salaries are top-notch, and people working in the networking field have jobs that are—more than most—fun, stimulating, and rewarding in many ways. Finally, you learned a little about the Sarbanes-Oxley ... those jobs. Many opportunities are available. The important thing is to get started and pursue your objectives. Sarbanes-Oxley Act of 2002 You may be wondering what a law that was pas...

Ngày tải lên: 05/07/2014, 04:20

... some big drawbacks. Because all the subcables that make up the segment and run from node to node must be connected at all times, and because a failure in any part of the segment will cause the ... words standing for its inventors, Mr. Paul Neill of Bell Labs and Carl Concelman of Amphenol Corporation). BNC is a bayonet-style connector that quickly attaches and detaches with a quarte...

Ngày tải lên: 05/07/2014, 04:20

... domain name, perform a database query, and then return the actual address that should be used for that domain name. Generally, each ISP maintains its own DNS servers (and many companies and ... 254 N /A N /A 11111111 255 N /A N /A 100 Networking: A Beginner’s Guide Domain names are resolved to IP addresses through the use of domain name servers (DNS servers), which are servers...

Ngày tải lên: 05/07/2014, 04:20

... performs the actual work in the background. AppleTalk AppleTalk has been extended into AppleTalk Phase 2, which now allows routing of AppleTalk packets (assuming an AppleTalk Phase 2-capable router). ... Phase 2 variant can run over Ethernet, Token Ring, or Apple’s LocalTalk media. Under Ethernet, AppleTalk uses a variant of the 802.2 frame type called Ethernet Subnetwork Access Point...

Ngày tải lên: 05/07/2014, 04:20

... to access data, local support may be available to help. For instance, you might have a way for the user to log in to the distribution center’s LAN and access e-mail and files at the headquarters ... access to a centralized application, such as an accounting system or a sales order system N Remote access to groupware programs or custom applications N Internet access N Intranet/extranet...

Ngày tải lên: 05/07/2014, 04:20

... of bandwidth you can offer. You can estimate a particular application program’s bandwidth requirements by actually measuring the amount of bandwidth that application uses. On the LAN, you can ... workstation. The information actually transmitted—the screen information, keyboard data, and mouse data—usually doesn’t require much bandwidth. (One exception to this rule is a highly graphic...

Ngày tải lên: 05/07/2014, 04:20

... 152 Networking: A Beginner’s Guide the employees know each other. An example of a social engineering technique is calling an employee and posing as a network administrator who is trying to track ... book applies a “how-to” approach and teaches both novices and moderately experienced network security persons what to look for on a daily basis. 154 Networking: A Beginner’s...

Ngày tải lên: 05/07/2014, 04:20

... time and planning to purchase additional disk space as the need arises. This is because the capacity of disk drives increases at a rapid rate, while prices fall at a rapid rate. Buying a 1TB ... more RAM than a NetWare server. 191 Chapter 13: Network Servers: Everything You Wanted to Know but Were Afraid to Ask Also, database servers are RAM-hungry for databases of any appreciable...

Ngày tải lên: 05/07/2014, 04:20

... the server, another backslash, and the name of the share. (Additional backslashes and names can refer to folders and files within the share.) For example, to map drive G: to a share called EMPLOYEES ... network share to remain attached to that drive letter. You can create a drive mapping in many ways. The easiest way is to open Network from the client computer, locate the share you wa...

Ngày tải lên: 05/07/2014, 04:20