Network Overhead, What It Is? and How It’s Affecting the Overall Performance of Entire Network System?

4270 Words Oct 19th, 2012 18 Pages
DATA COMMUNICATIONS & NETWORKING

PROJECT II
Network overhead, what it is? And how it’s affecting the overall performance of entire network system?

SUBMITTED BY: ASM A. KARIM SPRING-2012 CIT-370-25

AS M K AR IM P AGE - 1 PENNSYLVANIA COLLEGE OF TECHNOLOGY

ABSTRACT
In general terms, overhead means anything extra that shouldn’ t be. So what is overhead in networking or how it’s affecting the entire network performance? It does not seem irrelevant for us to know something that most of us deal in everyday life knowingly or unknowingly. The technology like Ethernet that we use most to transfer data over the network is the main focus on this paper to measure the overhead. We all know the bandwidth we get from ISP, that’s what we
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For example, in a 10Mbps Ethernet connection the line may be able to transmit 10 million bits every second, but not all of those bits are data! Some of those bits are used for addressing and controlling purposes because we can’t just throw data into the network in raw form. Also, many of those bits are used for general overhead activities, dealing with SYN and ACK, collisions on transmission, error checking, re-transmission, and so on. Beyond those, there are several other issues that greatly impacting the network performances like hardware and software; overhead exists at each of its layer from the application and operating system to significant hardware configuration. Some of the visible and familiar issues are ability of the hardware to process the data and bandwidth limitations that exist in the chain
AS M K AR IM P AGE - 3

of data transmission. Bandwidth limitations cause network throughput issues because the entire network can only run as fast as its slowest link. These bottlenecks create reduced network performance. Another great factor is the asymmetry which offers higher bandwidth in one direction then other for internet access. This was developed in terms of common user internet uses behavior that people download more than they upload to the internet. From the better network design perspective it’s important to

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