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Best Free Network Analysis Tools
Source: http://www.techsupportalert.com/best-free-network-analysis-tools.htm
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Introduction
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Network analysis tools enable diagnosis of problems or allow
exploration of all hardware on a computer network. They generally fall
into three categories:
Hardware scanners on the other hand are more intelligent and look at the bigger picture of what the purpose of that device is and how it is interacting on the network. All of these tools are invaluable for those wanting to learn about networking or just want to investigate what is on their network and what each device is doing. |
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Discussion
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WireShark
(formerly Ethereal) has established itself as the premier packet
analyzer. It can capture packets of standard ethernet, PPP and VPN
interfaces. I have used it many times to identify people running heavy
reports bringing servers down to a crawl. WireShark requires installation of Windows Packet Capture package (WinPcap). WinPcap allows for other software to 'listen' secretly to the information coming and going through the network card on the computer. I found it better to install the latest winpcap first, rather than versions included with the programs. Nmap will scan an individual IP address or a range. It will report on open ports, interesting information and the likely type of device/operating system. This tool proved invaluable in proving to a client that the IP address he claimed was a print server in fact had a PC using it. Also requires WinPcap. Angry IP is a very lightweight program that allows you to quickly scan a range of IP addresses. It provides less information and options than Nmap, but shows open ports and highlights which addresses are active. One thing to keep in mind when using tools like these, for network analysis, is that if the network devices are connected together, through switches instead of hubs, the data will not be visible to all connected devices. Switches route data from a specific device to another specific device. Tools like WinPcap that listen on the network card, for traffic flowing through that card, are not going to see traffic on the network unless it has been specifically targeted for that machine running WinPcap. Think of it this way; there may be 8 lanes of traffic on a highway but there are 20 foot barriers between each lane and each lane only takes you to one specific exit. This example shows that although you are only a few feet from other traffic you are unable to see the cars to the left or right and you have no idea where they are going. That is exactly the way a switched network operates. If you are listening to traffic on a particular computer or server and expect to see a representation of all traffic you are not going to get what you are looking for. |
Links Software Gratis untuk Pembelajaran Bahasa Inggris
Free Application Software
for Learning English from iTunes, Android Market & Google Chrome
Dictionary &
Thesaurus http://itunes.apple.com/hk/app/dictionary-com-dictionary/id364740856?mt=8
English Idioms Illustrated
http://itunes.apple.com/hk/app/english-idioms-illustrated/id413057971?mt=8
Englishpod http://itunes.apple.com/hk/app/englishpod-learn-english/id342976197?mt=8 / http://englishpod.com
English
Synonyms Quiz
http://itunes.apple.com/hk/app/english-synonyms-quiz/id417586318?mt=8
English
Vocabulary Level Test
http://itunes.apple.com/nz/app/english-vocabulary-level-test/id447311101?mt=8
ESL Express:
Words Frequently Confused
http://itunes.apple.com/hk/app/esl-express-words-
Free Exam Vocabulary Builder http://itunes.apple.com/hk/app/flash-of-genius-gre-vocab/id422505265?mt=8
Grammar Express: Articles http://itunes.apple.com/hk/app/grammar-express-articles-lite/id370137927?mt=8
Grammar Express: Clauses http://itunes.apple.com/hk/app/grammar-express-clause-analysis/id369875899?mt=8
Learn English with busuu.com
http://itunes.apple.com/hk/app/learn-english-with-busuu-com/id379968583?mt=8
Merriam Webster Dictionary
http://itunes.apple.com/hk/app/merriam-webster-dictionary/id438477986?mt=8
Oxford Dictionary http://itunes.apple.com/hk/app/oxford-advanced-learners-dictionary/id407718583?mt=8
Sounds: The Pronunciation App http://www.soundspronapp.com / http://itunes.apple.com/hk/app/sounds-the- pronunciation-app/id428243918?mt=8 / Very useful for studying and
practising pronunciation
SAT Vocabulary Word
Memory
http://itunes.apple.com/hk/app/sat-vocabulary-word-automatic/id358809580?mt=8
SAT Vocabulary Visuals and
Audio by Vocab Ahead http://itunes.apple.com/hk/app/sat-vocabulary-visuals- audios/id379831473?mt=8 / Easy way to study and
remember words
Video Vocab TV
http://www.videovocab.tv/iphone-ipod-mobile-apps-english-vocabulary/free-video-vocab-mobile-app-
for-iphoneipodipad-released / http://itunes.apple.com/hk/app/business-english-vocabulary/id384411839?mt=8
Vocabology http://itunes.apple.com/hk/app/vocabology/id383809431?mt=8 / Useful to build your
vocabulary
Free Application Software from
Android Market
2. Sign in with your Google account (make sure your android
device is registered)
3. Go to Categories > Education and
Click the Top Free tab >
scroll to the bottom and
click see more
Advanced English &
250 Grammar
Quizzes https://market.android.com/details?id=com.EnglishGrammarExercises&feature=apps_topselling_free
GRE Tutor
https://market.android.com/details?id=com.superliminal.tutor.gre&feature=apps_topselling_free
Kaplan GRE Exam
Oxford A to Z of English
Oxford Grammar &
Phrasal Verbs https://market.android.com/details?id=ch.marandsoft.phrasalverbsen&feature=apps_topselling_free
TOEFL iBT Preparation
https://market.android.com/details?id=com.xuvi.pretoefl&feature=apps_topselling_free
TOEFL Trainer https://market.android.com/details?id=com.gadgetium.android.toefl&feature=apps_topselling_free
Vocabulary Trainer
TOEFL https://market.android.com/details?id=com.ova.vocabularytrainer.toefl&feature=apps_topselling_free
Free Application Software from
Google Chrome
Download &
Install Google Chrome
http://www.google.com/chrome
1. Sign in using
your
Google account
2. Go to the Chrome web
store and click
on Apps > Education
3. Or search
6 point 7
http://www.6point7.com/VideoChatRoom/English_Practice?cSrc=GCA is a video chat room to practice English
English 101
http://www.englishclass101.com/?src=chromewebstore has 3 levels – just sign up
GRE time http://gregame.weebly.com chose words and play to help you learn GRE vocabulary
GRE Touch
http://gre-center.appspot.com lets you visualise, test and
build GRE vocabulary iVocab
http://www.conceptwords.com/ivocab has quizzes for words for
TOEFL, GRE & SAT
Quizlet http://quizlet.com lets you create or
find word lists and tests
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