By Richard H. Blum
ISBN-10: 0471433012
ISBN-13: 9780471433019
ISBN-10: 0471481149
ISBN-13: 9780471481140
In those instances of decreased company budgets, this booklet indicates how one can attempt for functionality difficulties and the way to put in and run freely on hand instruments, rather than paying for expensive new and software program checking out packagesNetwork functionality is the number one headache for community operators; this e-book provides IT pros simple guidanceAuthor is a troubleshooting practitioner, a hands-on networking desktop professional for the dept of safeguard
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Additional resources for Network Performance Open Source Toolkit: Using Netperf, tcptrace, NIST Net, and SSFNet
Sample text
25) 211 ms 210 ms 211 ms $ The output from the traceroute program shows every router that responds to the expired test packet along the path to the destination host. Along with that information, the round-trip times that it took for the packet to reach each router are displayed (three separate test packets are sent with the same TTL value for each test). Remember that these values are round-trip response times, and can change with different loading on the individual routers. Networks that use load balancing will show inconsistent route paths between two points on the network, depending on the network load at the time of the test.
Bandwidth Capacity Bandwidth capacity is another factor in the determination of network throughput. The total amount of bandwidth available between two network endpoints can greatly affect the performance of a network. Devices directly connected on a 100-MB network switch should have significantly better performance than devices that are remotely connected via a slower T1 circuit. The ability to quantify this performance difference requires complex network theory to be built into the network performance tool.
The interfaces can be displayed with the Unix ifconfig program. 27 28 Chapter 2 To display all of the active network interfaces on a system, you must use the –a option. 4 Kb) # This system contains two network interfaces, a network interface card, called eth0, and the network loopback interface, lo. The loopback interface is often used for testing network programs without using the actual network. The ifconfig output also shows the basic information for the network card, such as the MAC and IP addresses, along with network statistics.
Network Performance Open Source Toolkit: Using Netperf, tcptrace, NIST Net, and SSFNet by Richard H. Blum
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