hi every body i get confuse between "link capacity" and "link bandwidth" useage or definition ? where shoulde i care about "link capacity" or "link bandwidth" ? designe branch office solution

When planning for a branch office implementation, your concern should be with regard to "available" bandwidth, not so much as to the total bandwidth. Visit anITKB.com, an IT Knowledge Base. Follow me on Facebook.

thanks JM, i don't know diffrent between capacity and bandwidth ? can u explaine it to me ?

Generally, when discussing network links, the two terms that come to mind are bandwidth and throughput, not capacity. I would say that capacity and bandwidth are the same. Bandwidth is simply the data rate measured in bits per second. Throughput is an average rate of successful message delivery over a communication channel. There are factors that affect throughput such as congestion. So while you may buy a certain amount of bandwidth from your provider, your throughput is generally less than the bandwidth. When thinking about a remote office connection, you have to take a look at what is actually available on that link for the application in question. For instance, for AD services to function within a normal range, you should have at least 512K of available bandwidth. Anything slower is going to cause degradation in performance. Visit anITKB.com, an IT Knowledge Base. Follow me on Facebook.