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| Your Teracom newsletter for December! |
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| In this issue: |
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| • End-of-Year Budget Special: DVD-Video Full Library 40% off! |
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| • Tutorial: What is a Port? |
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| • 2-for-1 Special! Course 101 January 23-25 New York |
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| • 2-for-1 Special! Course 116 IPv6 January 29-30 Washington DC |
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| • 2013 Winter-Spring Seminar Schedule |
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| • Online Courses & Certifications Affiliate Sales Program |
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| End-of-Year Budget Special: DVD-Video Full Library 40% off! |
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| Managers at large organizations need to make use of budgeted funds before year-end, to avoid losing them. To lend a helping hand, we're running a super year-end special: our full DVD library for only $995 including shipping... a savings of over 40%! Plus, you get free bonus online courses, textbooks and certification for up to five people, a value of over $800 free! |
Teracom's DVD-video training courses are an excellent way to use budgeted funds, allowing your people to get up to speed on telecom, datacom and networking fundamentals and technologies at their own pace and making a quality contribution to your learning resources and reference library. |
| You get nine two-hour full-color DVDs spanning telecom, wireless, datacom and networking, featuring an entertaining instructor and plenty of graphics plus high-quality printed course workbooks containing copies of all graphics plus detailed text notes, sure to be a valuable study guide and reference for years to come. |
| Plus, you get as free added bonuses six online courses in the CTNS Certification Package plus Telecom 101 textbook in downloadable eBook format, plus TCO CTNS certification for five people... $874 in bonuses, free. |
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| Try before you buy! Free previews of each course are online, and free full lessons are available as videotutorials. |
| Hundreds and hundreds of organizations have purchased our DVD-video courses. Read reviews including "This type of quality builds my faith in humanity" on the DVD-video courses page. |
Don't delay! Take advantage of this offer before it expires December 31 2012! It will not be repeated anytime soon!
Order DVD-Video Package V530 Full Library and enter coupon 1187 to get the sale price.
ordering information |
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| 2-for-1 Special! Course 101 January 23-25 New York |
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Take advantage of this recession-busting deal allowing you and a colleague to take our famous core training for only $697.50 each! Compare to $1995 or more for lower quality elsewhere.
We think you'll agree this is a very good deal - and an opportunity not to be missed! |
| Course 101 Telecom, Datacom and Networking
for Non-Engineering Professionals is an intensive three-day course designed to get you up to speed on virtually all aspects of telecom, datacom and networking, from fundamentals and jargon to the latest technologies, services and solutions. This is the essential core telecom knowledge set, tuned and refined over the course of 20 years... and constantly updated. The latest updates added lessons on IPv6, collocations and Service Level Agreements, 4G LTE, the Cloud, and VPNs. |
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| You and a colleague will get career- and productivity-enhancing training with a top-ranked instructor, 382-page course materials with detailed text notes,
plus over $350 worth of free bonuses: unlimited repeats of SIX online courses free, free companion reference textbook Telecom 101 in downloadable eBook and TCO certification, all for $1395. |
| Thousands of people from organizations including CIA, FBI, NSA, IRS, FAA, US Army, Navy, Marines, Coast Guard and Air Force, DND, Bank of America, Qualcomm, 3Com, Cisco, Intel, Verizon, AT&T, Alcatel, Nortel, Teleglobe, Microsoft, MindSpring, APEX Telecom, Equifax, Transamerica Insurance, The Hartford, Bell Canada, Bell Mobility, TELUS, American Broadband, Cap Gemini, ComSec Establishment, MicroCell Telecom, TDS Telecom, Kyocera, Winstar, Western Wireless, US Cellular, Ericsson/Hewlett-Packard, Defense Systems Information Agency, Entergy, Intelsat, RangeTel, Alltel, Vertek, DSCI, Cox Cable, Florida Power and Light, Frontier Communications, Western Iowa Telephone, Genuity, LG Electronics, Panasonic, SouthEast Telephone, State of Nebraska, State of Montana, Tektronix, Bermuda Telecom, Keytech, UTS and the Universal Service Administrative Company... to name a few... have taken this course and rated it excellent. Join us! |
| Don't delay! This offer applies only to the January 23-25 2013 seminar in New York City... and it will not be repeated anytime soon! Register one person for PS101-130123NY and two can attend for the price of one! Mention "2-for-1 special" and the name of the second person in the comments field.
Or call us: 1-877-412-2700 and we'll be glad to enter your registration for you.
register |
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| Another 2-for-1 Special! IPv6 Course January 29-30 Washington DC |
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| Here's another recession-busting deal: you and a colleague can get up to speed on IPv6 for only $497.50 each! Compare to $1995 or more for lower quality elsewhere.
We think you'll agree this also is a very good deal - and an opportunity not to be missed! |
| Course 116 IPv6 is a two-day comprehensive course on IPv6: what it is, how it works, how it will be deployed, and coexistence with IPv4, with full coverage of issues and best practices for IPv6 in operations, products and services. You will gain a solid understanding of IPv6, how the new types of IP addresses will be allocated and used, and the ripple effect on other protocols. |
| Plus, you will learn about areas that must be addressed when implementing IPv6 in operations, products and services, giving you powerful insight into issues you need to be aware of – and knowledge of current solutions that can be immediately applied in your work. |
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| This training is productivity-, efficiency- and accuracy-improving; an investment in your knowledge base and skill set sure to be repaid many times over... and two can attend for the price of one! |
| Don't delay! This offer applies only to the January 29-30 2013 seminar in Washington DC... and it will not be repeated anytime soon! Register one person for PS116-130129DC and two can attend for the price of one! Mention "2-for-1 special" and the name of the second person in the comments field.
Or call us: 1-877-412-2700 and we'll be glad to enter your registration for you.
register |
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| Tutorial: What is a Port? |
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The term "port" crops up in IP networking, particularly in the context of rules in routers and software firewalls.
One hears about "opening a port on a firewall" and "TCP ports" and "UDP ports". |
| So just what is a "port", exactly? |
| Like about 40% of the words in English after the Norman invasion of southern England following the Battle of Hastings in 1066, the English word "port" is French. Une porte is a door. |
| Of course, the French got it from Latin: porta (gate, door). The Latin word portus (port, harbor, and earlier, entrance, passage) and the Greek word poros (journey, passage, way) are obviously related. |
| In the computer hardware business, a port is a doorway into the machine: a jack, where a cable can be connected. In days past, there were serial ports and parallel ports on PCs. Today, we have USB ports and LAN ports. Technicians talk about connecting customers to ports on access equipment, for example, equipment with banks of modems. |
| In the computer software business, a port can be thought of as a doorway into the software running on the machine, a passageway to a specific computer program running on the computer. |
| Why is this necessary? Since there can be many computer programs (a.k.a. applications, apps) running on the same computer at the same time, when trying to communicate to a particular program, we require a mechanism to identify it, a way of telling the host computer to which program to relay our communications. |
| For example, we all know that it's possible to have multiple applications using the Internet connection on a computer at the same time. Think of an Outlook email program and a Chrome browser program running at the same time on a PC connected to the Internet. |
| When data arrives at this computer, how does the computer know whether this data is for the email program or for the browser program? And how does it convey the data to the correct program? |
| The answer: every program is assigned a number called a port number. Your browser is assigned port 80, for example. |
| Here's how it works: the sending program creates a message and tags it with the port number identifying the program it wishes to communicate with on the destination computer. This is put in a packet that is tagged with the network address (IP address) of the destination host computer and transmitted. When the packet arrives at the destination computer identified by the IP address, this receiving computer looks at the destination port number and parks the message in a memory space associated with that port number. The program on the destination computer assigned that port number is constantly checking that memory space to see if there is anything new waiting for it. |
| The result is the ability for a computer program running on one computer to communicate with a specific computer program on another computer. |
| Visiting our warehouse service a couple of weeks ago, I was struck by the analogy possible between the idea of computer ports and a multi-tenant warehouse, so whipped out my Android smartphone and took a picture with the totally cool panoramic feature: |
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| The warehouse is analogous to the host computer. It has a single street address. It handles goods for multiple users. Users have space allocated inside the warehouse. The warehouse has (on this side) six ports, also called loading docks. Each port has a number. A user can be assigned a port, either temporarily or permanently. |
| To communicate goods to that user, they're carried in a shipping container (IP packet) on a truck (Ethernet frame) over a road (LAN cable) to the warehouse at its street address (IP address). To get the contents of the shipping container delivered to the correct user, the truck is backed up to the appropriate loading dock (port) identified by its door number (port number) and the contents of the container are unloaded to the space behind that port. |
In computer communications today, the port number is 16 bits long, and the source and destination port number are populated at the beginning of the transport layer header, Layer 4 of the OSI model. The world's most popular standard protocols for implementing the transport layer are the TCP (Transmission Control Protocol) and UDP (User Datagram Protocol).
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| Hence, one hears of "TCP ports" and "UDP ports", particularly when configuring rules for packet forwarding on a router or firewall. When one "blocks" a port, that means that communication to a particular computer program is denied. When one "opens" a port, communication to that computer program is being allowed. |
| Standard practice is to allow communications only to specifically-identified ports and deny all other communications. |
The port number of the application and the IP address of the host computer concatenated together is called a socket in UNIX and IP and is called a transport service in the OSI model. The result is the ability to identify the specific source computer program on one computer and the specific desired destination computer program on a different computer. |
I hope you've enjoyed this tutorial! This discussion is covered in the following Teracom training courses:
• Instructor-led Course 101: Telecom, Datacom and Networking for Non-Engineering Professionals, Lesson 12.17
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Instructor-led Course 110: IP, VoIP and MPLS for the Non-Engineering Professional, Lesson 8.25-8.27
• DVD-Video Course V4: Understanding Networking 1
• DVD-Video Course V5: Understanding Networking 2, Lesson 2.11
• Online Course L2112 The OSI Layers and Protocol Stacks, Lesson 8
• Online Course L2113 IP Networks, Routers and Addresses, Lessons 7 and 9 |
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| 2013 Winter - Spring Seminar Schedule |
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| Course 101 Telecom, Datacom and Networking
for Non-Engineering Professionals is the first course in our Core Training section - an intensive three-day course designed for
non-engineering professionals, to get you up to speed on virtually all aspects of telecom, datacom and networking, from fundamentals and jargon to the latest technologies. |
| Three day course. 384-page course materials.
Top-ranked instructor. $1395.
The essential core knowledge set, tuned, refined and constantly updated over the course of 19 years. detailed outline |
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| Course 116 IPv6 is a two-day comprehensive course on IPv6: what it is, how it works, how it will be deployed, coexistence with IPv4, with full coverage of issues and current best practices for IPv6 in operations, products and services. |
| Taking this course, you will gain a solid, comprehensive understanding of IPv6, its important new characteristics, how the new types of IPv6 addresses will be allocated and used, and the ripple effect on other protocols. This is essential knowledge.
Plus, you will learn about areas that must be addressed when implementing IPv6 in operations, products and services, giving you powerful insight into issues you need to be aware of – and knowledge of mainstream solutions and best practices that can be immediately applied in your work. |
2 day course. 200+ page course materials.
Top-ranked instructor. $995.
What you need to know to get ready for IPv6. detailed outline |
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| Course 110 IP, VoIP and MPLS for the Non-Engineering Professional is the “next” course in our Core Training series, covering IP technologies: IP networks from the ground up, fiber, Ethernet, routing, MPLS, security and VoIP. |
| Designed for non-engineers, this training course will give you the solid, vendor-independent foundation knowledge necessary to deal with IP telecom network projects and IP voice and data applications with confidence. |
Three day course. 419-page bound course materials. Top-ranked instructor. $1395.
Productivity- and career-enhancing knowledge skills for today's IP telecom. detailed outline |
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Course 130 Understanding Voice over IP is a two-day comprehensive VoIP training course
for non-engineering professionals who need an overview and update on VoIP fundamentals, PBX replacement, convergence, carrier services and interconnect, implementation issues and solutions, VoIP system vendors, business and deployment cases and project management. |
| Taking this voip training course, you'll obtain the solid foundation necessary to intelligently discuss, compare and evaluate VoIP technologies, products and implementation choices, demystifying the jargon, understanding the fundamentals and how it all fits together... knowledge you can't get reading trade magazines or talking to salespeople. |
Two day course. 304-page bound course materials.
Top-ranked instructor. $995.
Comprehensive VoIP course
for non-engineers. detailed outline |
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| BOOT CAMP is core training Course 101 Telecom, Datacom and Networking for
Non-Engineering Professionals and VoIP Course 130 Understanding Voice over IP back-to-back
in one week at a discounted price. |
Seize this opportunity to really get up to speed and fill in the gaps.
You'll have an advantage over the competition with this career-enhancing knowledge
of telecom,
datacom, networking, IP, MPLS and VoIP. You'll be more effective and less frustrated,
understanding the ensemble of communications technologies, the jargon, buzzwords
and how it all works together. how to register |
This is an easy sell with management.
Your increased efficiency, productivity and informed decision-making will repay the cost of the training many times over. Plus, you benefit from
a special discount, and get the free bonus Online Courses, certification and Telecom 101 textbook eBook, making it an unbeatable value. |
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| This is the 5-day BOOT CAMP that hundreds of people have attended over the years. Take this BOOT CAMP to get up to speed on the whole telecom and networking picture from A to Z, beginning with POTS and the PSTN, progressing through wireless telecom, data communications, The Cloud, Ethernet LANs, IP networking, MPLS, the Internet, to VoIP fundamentals, VoIP systems and applications and project management. |
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| BOOT CAMP Agenda |
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| How to register for BOOT CAMP and get the $395 discount |
Attending both courses as the 5-day BOOT CAMP is totally optional.
You are welcome to attend one course, or the other, or both, as best meets your needs.
But with the low incremental cost and wall-to-wall training, BOOT CAMP is a great opportunity. How to register |
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| Join our Affiliate Sales Program and earn commissions on referrals |
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| Join Teracom Training Institute's affiliate sales program, advertise Teracom Online Courses and Certifications on your website, and earn a commission on every student you refer who registers for Online Courses and Certifications! |
| Teracom is the leader in telecom and network training courses, developed and refined over twenty years. Teracom training courses now available online are top-notch, top-quality and right up to date. |
| We've partnered with the Telecommunications Certification Organization for certifications. Students register for a Certification Package, which includes courses and certification exams, complete the courses and exams, and earn TCO Certification, with diploma, letter of reference and more. |
| To be accepted as a Teracom Sales Affiliate, you'll need to have an established web site or blog with sufficient daily page views by unique visitors, and place descriptive text, graphics and your unique affiliate link supplied by Teracom on your index page. |
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| To begin the process of becoming a Teracom Sales Affiliate, please complete the "contact us" form, stating that you would like to apply to join the Teracom Affiliate Sales Program, and include the address of your website. |
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