Solved

Protocol Analayzer Understanding..

Posted on 2006-07-18
5
232 Views
Last Modified: 2010-03-05
Ok so i am new to using protocol analayzer i ahve a couple questsions for those that are expertise in it..

On which layer will will i be using to find whether information is being retransmitted ?

and

Which layer will i look to determine whether there is a routing problem ??

reason i ask this, is because i am trying to troubleshoot my network problem... between my current work area and our headquaters in a different city.. The data being transmitted from each other is taking twice as long as it usually did a week ago ? i was told to use a protocol analyzer to help further find the problem... well i am new to using analyzer so if anyone could help me answer these questions, would be greatly appreciated thanks..
0
Comment
Question by:Coupee36
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
5 Comments
 
LVL 57

Expert Comment

by:giltjr
ID: 17135673
Data retransmission can take place at many layers so the answer there is "It depends."

For routing problems, you don't need a protocol analyzer, you just need the ability to do traceroute (tracert in Windows) from source PC and the target PC.

What you want to look for in the the trace is the general packet flow between the two hosts.  You also need to know what protocol/application is being used to transmit the data.  Is it ftp, sftp, ftps, or SCP?

Even more generally typically you should see data going from the source to the target and ACK's everynow and then from the target to the source.  You want to look for delay's between the data and the ACK's.

0
 

Accepted Solution

by:
vodkamilkshake earned 63 total points
ID: 17152531
You should use Ethereal, its a free network analyzer. It can detect and display many anomalies regarding TCP traffic and it shows pretty user friendly messages too. As far as which layer to look at is concerned, pay attention to source and destination addresseses in physical layer, and the same in tcp layer. Just go around with it a little bit and you will find alot of useful information.
0
 
LVL 57

Assisted Solution

by:giltjr
giltjr earned 62 total points
ID: 17153468
Are you already using a analyzer?  If so which one?  If not you can use Ethereal as vodkamilkshake or its "replacement" Wireshark (http://www.wireshark.org)

0

Featured Post

Use Case: Protecting a Hybrid Cloud Infrastructure

Microsoft Azure is rapidly becoming the norm in dynamic IT environments. This document describes the challenges that organizations face when protecting data in a hybrid cloud IT environment and presents a use case to demonstrate how Acronis Backup protects all data.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Cisco ASA blocks some https sites. 27 65
WAN Link comparsion 3 36
Home firewall recommendations 11 90
How long to crack a 8 chars alphanumeric password 18 90
As cyber crime continues to grow in both numbers and sophistication, a troubling trend of optimization has emerged over the last year.
Ransomware is a malware that is again in the list of security  concerns. Not only for companies, but also for Government security and  even at personal use. IT departments should be aware and have the right  knowledge to how to fight it.
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

749 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question