All about Networking and Systems... This Site Contains useful links for study material to help students and Professional engineers. Also Weekly updates for latest Jobs in the related field
Wednesday 27 April 2011
Monday 25 April 2011
Computer Network – Basics
An internet work is a collection of individual networks, connected by intermediate networking devices, that functions as a single large network. The networking devices are the vital tools for communication. Whenever you have a set of computers or networking devices to be connected, you make the connections, depending on the physical layout and your requirements Depending on the physical layout or topology of the network, there are three types of networks.
LAN
LAN stands for Local Area Network. These networks evolved around the PC revolution. LANs enabled multiple users in a relatively small geographical area to exchange files and messages, as well as access shared resources such as file servers.
WAN
WAN stands for Wide Area Network. The interconnection of various LAN’s through telephone network, which unites geographically distributed users is achieved through WAN. In short when we log on to the internet, we become a part of a WAN.
MAN
MAN stands for Metropolitan Area Network. It is usually the interconnection between various LAN’s in a particular geographical area like a metropolitan city like Bombay. Hence the name.
Internetworking evolved as a solution to three key problems: isolated LANs, duplication of resources, and a lack of network management. Isolated LANS made electronic communication between different offices or departments impossible. Duplication of resources meant that the same hardware and software had to be supplied to each office or department, as did a separate support staff. This lack of network management meant that no centralized method of managing and troubleshooting networks existed.
Open Systems Interconnection Model
The OSI model is the basic model describing the data movement through a network. The Open Systems Interconnection (OSI) reference model describes how information from a software application in one computer moves through a network medium to a software application in another computer. The OSI reference model is a conceptual model composed of seven layers, each specifying particular network functions. The OSI model divides the tasks involved with moving information between networked computers into seven smaller, more manageable task groups. A task or group of tasks is then assigned to each of the seven OSI layers.
The following list details the seven layers of the Open System Interconnection (OSI) reference model:
People Do Need To Send Packets Away.
The first letter of each word is related to the alphabet associated with the name of the OSI layer. P of People stands for Physical Layer of the OSI model and so on.
Protocol
The OSI model provides a conceptual framework for communication between computers, but the model itself is not a method of communication. Actual communication is made possible by using communication protocols. In the context of data networking, a protocol is a formal set of rules and conventions that governs how computers exchange information over a network medium. A protocol implements the functions of one or more of the OSI layers. A wide variety of communication protocols exist, but all tend to fall into one of the following groups: LAN protocols, WAN protocols, network protocols, and routing protocols. LAN protocols operate at the network and data link layers of the OSI model and define communication over the various LAN media. WAN protocols operate at the lowest three layers of the OSI model and define communication over the various wide-area media. Routing protocols are network-layer protocols that are responsible for path determination and traffic switching. Finally, network protocols are the various upper-layer protocols that exist in a given protocol suite.
This being the beginning session, I haven’t dwelled into the details. Lets start small and end big! So till then get these fundamentals ingrained in your mind.
LAN
LAN stands for Local Area Network. These networks evolved around the PC revolution. LANs enabled multiple users in a relatively small geographical area to exchange files and messages, as well as access shared resources such as file servers.
WAN
WAN stands for Wide Area Network. The interconnection of various LAN’s through telephone network, which unites geographically distributed users is achieved through WAN. In short when we log on to the internet, we become a part of a WAN.
MAN
MAN stands for Metropolitan Area Network. It is usually the interconnection between various LAN’s in a particular geographical area like a metropolitan city like Bombay. Hence the name.
Internetworking evolved as a solution to three key problems: isolated LANs, duplication of resources, and a lack of network management. Isolated LANS made electronic communication between different offices or departments impossible. Duplication of resources meant that the same hardware and software had to be supplied to each office or department, as did a separate support staff. This lack of network management meant that no centralized method of managing and troubleshooting networks existed.
Open Systems Interconnection Model
The OSI model is the basic model describing the data movement through a network. The Open Systems Interconnection (OSI) reference model describes how information from a software application in one computer moves through a network medium to a software application in another computer. The OSI reference model is a conceptual model composed of seven layers, each specifying particular network functions. The OSI model divides the tasks involved with moving information between networked computers into seven smaller, more manageable task groups. A task or group of tasks is then assigned to each of the seven OSI layers.
The following list details the seven layers of the Open System Interconnection (OSI) reference model:
- Layer 7—Application layer (A)
- Layer 6—Presentation layer (P)
- Layer 5—Session layer (S)
- Layer 4—Transport layer (T)
- Layer 3—Network layer (N)
- Layer 2—Data Link layer (D)
- Layer 1—Physical layer (P)
People Do Need To Send Packets Away.
The first letter of each word is related to the alphabet associated with the name of the OSI layer. P of People stands for Physical Layer of the OSI model and so on.
Protocol
The OSI model provides a conceptual framework for communication between computers, but the model itself is not a method of communication. Actual communication is made possible by using communication protocols. In the context of data networking, a protocol is a formal set of rules and conventions that governs how computers exchange information over a network medium. A protocol implements the functions of one or more of the OSI layers. A wide variety of communication protocols exist, but all tend to fall into one of the following groups: LAN protocols, WAN protocols, network protocols, and routing protocols. LAN protocols operate at the network and data link layers of the OSI model and define communication over the various LAN media. WAN protocols operate at the lowest three layers of the OSI model and define communication over the various wide-area media. Routing protocols are network-layer protocols that are responsible for path determination and traffic switching. Finally, network protocols are the various upper-layer protocols that exist in a given protocol suite.
This being the beginning session, I haven’t dwelled into the details. Lets start small and end big! So till then get these fundamentals ingrained in your mind.
Saturday 23 April 2011
Free CCNA Study Guides
Getting your CCNA certification needn't cost a fortune. The links below will take you to free CCNA study guides and other self-study resources. Some of them you may have to register for first, but in all cases the registration only takes a couple of minutes and is completely free. Remember also to check out our sections on free CCNA practice tests and other CCNA general information.
And don't forget that you can also get a completely free subscription to many different computer magazines, including Network Magazine (and many other types of mags) here.
cisco.com Cisco's Prep Center - lots of helpful CCNA study material
vtc.com CCNA video tutorials, many free
tcpmag.com 640-801 Exam review
ib.usac.edu.gt 640-801 Cram sheet
folk.ntnu.no - CCNA exam guide, pdf
fog.ccsf.edu - lots of links to CCNA related topics
palaestratraining.com Long video tutorial on Frame Relay and on OSPF
bookpool.com IP subnetting, CCNA book sample chapter
kp-lab.com Cram sheet for the 640-801
chinatag.com - 640-801 lab study guide
techtarget.com 6 sample chapters from various CCNA study books
netasr.info - CCNA study guide, pdf
media.wiley.com - Internetworking, sample chapter for CCNA 640-801
go4mcse.com CCNA study guide
techfest.com Tutorials on IP addressing, routers, TCP/IP etc
certmag.com Dissecting the CCNA exam 640-607
mcmcse.com Free CCNA study guides. Enter site, click on overhead menu
fantek.org Bruce's unofficial CCNA study cram sheet
unixhub.com CCNA cheat sheet
go4mcse.com CCNA Study Guide
examnotes.net Requires free registration first
rad.com Some tutorials prepared by students
nikmakris.com Nik Makris' Cisco CCNA revision notes
netcert.tripod.com - dated CCNA info, but still relevent in parts
go4mcse.com Ramesh's CCNA braindump
go4mcse.com another CCNA study guide
gdd.net Need to log in first (free), but some good quality info
itgameroom.com Play games and learn about Cisco stuff
telekomunikacije.etf.bg.ac.yu PDF file on IP addressing
cbtnuggets.com Free videos, but needs latest WMP
certifyexpress.com Free CCNA pdf
geocities.com/ellis_craig - CCNA study notes
certcities.com Certcities CCNA study guide part 1
certcities.com CCNA Part 2
celticrover.com Very good resource site
routergod.com/ Some good tutorials from, er, celebrities.
og.ccsf.edu might be some useful stuff here
ipprimer.com Daryl's TCP/IP primer
millbury.k12.ma.us General networking study guide
groupstudy.com Cisco certification study group with study guides
networkingexamacademy.com CCNA ICND1 study guide
Thursday 21 April 2011
Top 10 Networking Jobs:
1: Mid-Level Cisco Network Engine
2: Sr Network Engineer
3: Sr Network Administrator
4: IT Support -Networking & Copi
5: Network Engg./administrater, s
6: Part Time Internet Social Netw
7: network marketing
8: IT Director/Network Administra
9: IT Director/Network Administra
10: IT Network Consultant
2: Sr Network Engineer
3: Sr Network Administrator
4: IT Support -Networking & Copi
5: Network Engg./administrater, s
6: Part Time Internet Social Netw
7: network marketing
8: IT Director/Network Administra
9: IT Director/Network Administra
10: IT Network Consultant
Wednesday 20 April 2011
Juniper Certifications
Our JNO-532 practice exams
por anthony1987
viernes, 15 de abril del 2011 a las 10:00
guardado en Jno-532
Be IT Certified guarantees that you will pass your exam on the first attempt, regardless of when you take the Exam. Our Training products are under a constant revision and are kept up to date and relevant at all times. You will enjoy the added benefits of technical support.
Juniper Networks JNO-532 certificates give you possibility to work in any country of the world because they are acknowledged in all countries equally. This Test4exam JNO-532 torrent certificate helps not only to improve your knowledge and skills, but it also helps your career, gives a possibility for qualified usage of Test4exam JNO-532 exam products under different conditions.
Many IT specialists were not able to obtain the Microsoft JNO-532 certificate from the first attempt, which was the result of poor preparation for the examination, using preparatory Microsoft JNO-532 study guide of poor quality. Our JNO-532 practice exams and study questions are composed by current and active Information Technology experts, who use their experience in preparing you for your future in IT area.
This braindumps includes JN0-532 study guide, JN0-532 practice exam and much more which will not only enhance your abilities to cope with the problems but you will also be able to manage online real time problems. The only way to achieve exam guide and braindumps is to buy JN0-532Trainning Materials that for lifetime.
Juniper Networks JNO-532 certificates give you possibility to work in any country of the world because they are acknowledged in all countries equally. This Test4exam JNO-532 torrent certificate helps not only to improve your knowledge and skills, but it also helps your career, gives a possibility for qualified usage of Test4exam JNO-532 exam products under different conditions.
Many IT specialists were not able to obtain the Microsoft JNO-532 certificate from the first attempt, which was the result of poor preparation for the examination, using preparatory Microsoft JNO-532 study guide of poor quality. Our JNO-532 practice exams and study questions are composed by current and active Information Technology experts, who use their experience in preparing you for your future in IT area.
This braindumps includes JN0-532 study guide, JN0-532 practice exam and much more which will not only enhance your abilities to cope with the problems but you will also be able to manage online real time problems. The only way to achieve exam guide and braindumps is to buy JN0-532Trainning Materials that for lifetime.
Test4exam JN0-360 imparts
por anthony1987
viernes, 15 de abril del 2011 a las 10:00
guardado en Jn0-360
Test4exam JN0-360 study materials has been prepared with great care and vigilance, keeping in view the demands of the aspirants for the JN0-360 exam certification. It is the fruit of long toil of our skilled and experienced IT professionals who have a thorough knowledge of the requirements of the said certification. Test4exam JN0-360 imparts you confidence in stepping towards the exam. Test4exam JN0-360 is the number one choice of IT professionals for exam JN0-360.
To match the current real test, the technical team from Test4exam will update the Questions and Answers for any changes in time, we will mend the exam pool with the suggestions from those users who got full scores in this exam, so to perfect Test4exam JN0-360 to make it always have the best quality exams.
JN0-360 Questions and Answers for any changes in time, and also we are always accepting the feedbacks about JN0-360 exam from our users, in specialty, we will mend the JN0-360 exam pool with the suggestions from those users who got full scores in this exam, so to perfect Test4exam JN0-360 to make it always have the best quality exams.
It is the fruit of long toil of our skilled and experienced IT professionals who have a thorough knowledge of the requirements of the said certification. Test4exam JN0-360 imparts you confidence in stepping towards the exam. Test4exam JN0-360 is the number one choice of IT professionals for exam JN0-360.
To match the current real test, the technical team from Test4exam will update the Questions and Answers for any changes in time, we will mend the exam pool with the suggestions from those users who got full scores in this exam, so to perfect Test4exam JN0-360 to make it always have the best quality exams.
JN0-360 Questions and Answers for any changes in time, and also we are always accepting the feedbacks about JN0-360 exam from our users, in specialty, we will mend the JN0-360 exam pool with the suggestions from those users who got full scores in this exam, so to perfect Test4exam JN0-360 to make it always have the best quality exams.
It is the fruit of long toil of our skilled and experienced IT professionals who have a thorough knowledge of the requirements of the said certification. Test4exam JN0-360 imparts you confidence in stepping towards the exam. Test4exam JN0-360 is the number one choice of IT professionals for exam JN0-360.
The JN0-343 study guide
por anthony1987
viernes, 15 de abril del 2011 a las 09:59
guardado en Jn0-343
The IT specialists of Sadikhov get the same examination questions object, as long as you remember the questions and answers without buy any materials, you are able to be JN0-343 certificated.
Test4exambible virtual mode gives you real exam experience with scoring and times your performance just like an actual Juniper JN0-343(Juniper Networks Certified Internet Specialist (JNCIS-ENT) ) Certification Exam,If not Successd to pass it,FULL REFUND of your purchasing fee.
Test4exam examkiller JN0-343 braindump product is the JN0-343 questions and answers with a downloadable testing engine. Use the JN0-343 exam simulator to prepare for your upcoming exam and pass it with confidence. JN0-343 exam materials has already proved its uniqueness and accuracy through thousands of examkiller users who have passed their JN0-343 exam quite easily using examkiller JN0-343 exam materials.
The JN0-343 study guide from examkiller is all you will need to gain practical hands-on experience with actual Lab exercises including the concepts and objectives outlined by the vendors themselves. Although the JN0-343 exam study guide is very popular, we offer a wide range of study guides and will continue to release new study guides to meet the rapidly increasing demand of the IT industry.
Test4exambible virtual mode gives you real exam experience with scoring and times your performance just like an actual Juniper JN0-343(Juniper Networks Certified Internet Specialist (JNCIS-ENT) ) Certification Exam,If not Successd to pass it,FULL REFUND of your purchasing fee.
Test4exam examkiller JN0-343 braindump product is the JN0-343 questions and answers with a downloadable testing engine. Use the JN0-343 exam simulator to prepare for your upcoming exam and pass it with confidence. JN0-343 exam materials has already proved its uniqueness and accuracy through thousands of examkiller users who have passed their JN0-343 exam quite easily using examkiller JN0-343 exam materials.
The JN0-343 study guide from examkiller is all you will need to gain practical hands-on experience with actual Lab exercises including the concepts and objectives outlined by the vendors themselves. Although the JN0-343 exam study guide is very popular, we offer a wide range of study guides and will continue to release new study guides to meet the rapidly increasing demand of the IT industry.
Juniper Networks JN0-332 Test4exam questions
por anthony1987viernes, 15 de abril del 2011 a las 09:57guardado en Jn0-332Our highly certified professional staff works hard to make the exam preparation guides according to the latest updates. The actual test JN0-332 questions contain full detailed explanation that why a question is true and why it is false.
The prepration guide also contains the short tutorials, JNCIS JN0-332 study notes, Juniper NetworksJN0-332 braindumps, JN0-332 pdf, JN0-332 study guide, JN0-332 practice questions, JN0-332 reviews and articles.JN0-332 ebooks
The first step for any one trying to pass the Juniper Data Protector Software Fumdamentals On UNIX exam is to use the Test4exam JN0-332 questions and answers with the free Juniper JN0-332 download Test4exam exam simulator. Covering every one of the basics and advanced core steps of the Juniper JN0-332 exam, you will achieve your passing score on the first try, and that’s GUARANTEED! Here’s what you get with each Juniper JN0-332 Test4exam questions and answers package:
Custom crafted Juniper questions and answers by our Juniper JN0-332 expertsQuestions and answers delivered via our downloadable testing engineJuniper JN0-332 simulations environment like the testing centersDrag and drop, multiple choice and hotspot questions (when applicable)Images, examples and exhibits (when applicable)Free updates to your product during your licenseProfessionally verified Juniper Networks JN0-332 answersOur industry-unmatched GUARANTEEMost important of all,The JN0-321 Exam details
por anthony1987viernes, 15 de abril del 2011 a las 09:56guardado en Jn0-321This JN0-321 torrent certificate helps not only to improve your knowledge and skills, but it also helps your career, gives a possibility for qualified usage of JN0-321 exam products under different conditions. The majority of companies in the sphere of information technologies require the presence of JN0-321 exams for the work in the company, and that makes obtaining this JN0-321 certificate necessary. Many IT specialists were not able to obtain the real JN0-321 certificate from the first attempt, which was the result of poor preparation for the examination, using preparatory JN0-321 study guide of poor quality.
These exam questions provide you with the experience of taking the actual test. Our JN0-321 Exam is not just exam questions. They are your access to high technical expertise and accelerated learning capacity.
To match the current real test, the technical team from Test4exam will update the JN0-321 Questions and Answers for any changes in time, and also we are always accepting the feedbacks about Juniper Networks JN0-321 exam from our users, in specialty, we will mend the exam pool with the suggestions from those users who got full scores in Juniper Networks JN0-321 exam, so to perfect Test4exam JN0-321 to make it always have the best quality.
The JN0-321 Exam details are researched and produced by Professional Certification Experts who are constantly using industry experience to produce precise, and logical. You may get questions from different web sites or books, but logic is the key. Our Product will help you pass test in your first try, and also save your valuable time. Exam.HP0-J33 Practice exam
por anthony1987sábado, 22 de enero del 2011 a las 07:53guardado en Hp0-j33Easiest way to get these certifications is to log on to the HP0-J33 Test4exam and download the HP0-J33 test questions to do IBM Great Plains 8.0 Integration Manager practice exam to obtain your free HP0-J33 exam certification.Test4exam HP HP0-J33 Practice Questions are designed with questions, coupled withprecise, logical and verified explanationspassed with 95% used HP0-J33 and the newer dump
free braindump HP0-J33 provides exam questions, these HP0-J33 questions that do occur in the HP0-J33 exam, could guide you right through so that it would become more easy to achieve a HP0-J33 certification. All of these HP0-J33 free braindump HP0-J33 contain much more explanations and detail reasoning as well as backend logic of the questions also available with these questions. HP0-J33 also provides training material in HP0-J33 study guides format. This HP0-J33 study guide enables you to learn more and more about IT technologies and makes you more efficient for your HP0-J33 exam. You can also learn very easily because of the easiest way of these HP0-J33 free braindump HP0-J33.
Each HP0-J33 resource available from Test4exam.com a has been hand crafted by our team of practicing HP0-J33 IT Professionals. Test4exam is certain that your HP0-J33 Practice exam(s), Labs, and HP0-J33 HP0-J33 test are the highest quality, and customized to make the Test4exam.com a learning experience the best choice you can make in preparing for your HP0-J33 Certification.
http://csw1987.hostablog.net/2011/01/14/hp0-j33-practice-exam/HP0-P21 certification exam
por anthony1987sábado, 22 de enero del 2011 a las 07:42guardado en Hp0-p21HP-UX HP0-P21 exam (HP-UX 11i v3 Advanced System Administration ). You can check out the interface, question quality and usability of our practice exams before you decide to buy it. We are the only one site can offer demo for almost all products.HP HP0-P21 guarantees you could pass your HP0-P21 certification exam! HP HP0-P21 study guide or HP0-P21 test engine simulator and fail the corresponding HP0-P21 exam once within 90 days of purchase or within 90 days of receipt of the HP0-P21 product, which ever occurs latter. Contact Test4exam to claim this HP0-P21 guarantee, then the HP0-P21 study material can be returned for a full refund.
test4exam HP0-P21 exam is great, I recommend a lot of friends, he can very well help you review the HP0-P21. Allows you to easily test more easily. I believe there is nothing wrong test4exam
http://www.dailywebarticles.com/index.php/2011/01/14/hp0-p21-certification-exam/HP0-P20 Exam
por anthony1987sábado, 22 de enero del 2011 a las 07:29guardado en Hp0-p20will need to take your HP0-P20 Exam. The HP0-P20 Exam details are researched and produced by Professional Certification Experts who are constantly using industry experience to produce precise, and logical
Test4examis the IT industry certification exam site. mainly provides various IT certification study abroad information. Test4examis the IT examination provider of supplementary information. Has a strong web site development and operations teams, product development teams around the clock and 7 * 24 online support services, Cisco, Sun, compTIA, IBM, HP and other leading IT certification categories of learning materials, content close to the test, a software product forms, books , Video, electronic magazines, and the organization points to redeem, affiliate marketing and other forms of promotional and marketing activities. Test4examIT Certification master the knowledge of the candidates to obtain certification in hand with some help.
http://gentedefe.com/shaniqua/2011/01/14/hp0-p20-exam-details/
Site Updates
|
|
|
|
|
Certification News
|
|
|
|
Cisco Redesigns its Voice and Security Certifications | Oct. 25, 2010 |
Cisco Redesigns its Voice and Security Certifications to Align with Evolving Job Roles and Business Requirements Cisco is pleased to announce major ... Full Story | More News | |
Shortcuts
Free Practice Exams - We have dozens of free certification practice tests with over 4,500 total questions. Free Study Guides - Check out our free study guides and tutorials to help you pass your exams. Find Training Materials - Our Training Directory lists books and training products with ratings and reviews. Free Tech Magazines - Free subscriptions to magazines such as ComputerWorld, eWeek and many more. Discount Exam Vouchers - Save money on your certification exams with discounted exam vouchers. Certification Forums - Get answers to your questions and help others in our popular discussion forums. |
Friday 15 April 2011
About This Site
This Site is to support the students who want to get knowledge in the field of Network and other It fields. Our site has materials for Microsoft, CompTIA, Cisco, LPI, CIW, and other I.T. certifications.
Subscribe to:
Posts (Atom)