tailieunhanh - network performance toolkit using open source testing tools phần 6

Các ứng dụng ntop sản xuất các kết quả đồ họa của các mạng dữ liệu thời gian thực như nhìn thấy từ các thiết bị giám sát. Điều này cho phép bạn giám sát các dữ liệu thực tế để tìm các vấn đề mạng như chúng xảy ra, cũng như mạng thông tin tích lũy, chẳng hạn như giao thức phân phối. | tcptrace 195 The next chapter describes another application that analyzes existing network data. The ntop application produces graphical results of real-time network data as seen from the monitoring device. This allows you to monitor actual data to look for network problems as they occur as well as see cumulative network information such as protocol distribution. With this feature you can easily see what types of traffic are present on your network and the percentage of bandwidth they are consuming. CHAPTER 11 ntop The ntop application demonstrates still another type of network performance tool. ntop monitors network traffic that traverses the host network connection. By analyzing packet headers ntop can watch for trends in the network traffic and display charts and graphs showing network application trends. This can be extremely helpful when you don t know what types of packets are present on busy networks or which hosts generate or receive the bulk of the network traffic. This chapter describes how to install and configure ntop to monitor network traffic on your network and shows you how to use its information to watch your network performance. The ntop application was developed at the University of Pisa in Italy to help network administrators determine which devices are consuming the most resources on a network. Like the Unix top program which shows what programs consume the most system resources ntop shows network usage based on which hosts and protocols are consuming the most network resources. Identifying applications and hosts that are the most active on the network often allows you to rearrange existing network resources to accommodate the traffic patterns. .