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RAD Group

RAD Group is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand RAD Group rather than just read about it. In short: RAD Group is a number of independent companies that develop, manufacture and market solutions for diverse segments of the networking and telecommunications industry. Each company operates independently, without a holding company, but is guided by the group founders under a collective strategic umbrella.

RAD Group — main illustration
RAD Group — illustration

Key takeaways

  • RAD Group belongs to computer science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect RAD Group to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of RAD Group from memory before moving on to harder problems.

Reference excerpt

RAD Group is a number of independent companies that develop, manufacture and market solutions for diverse segments of the networking and telecommunications industry. Each company operates independently, without a holding company, but is guided by the group founders under a collective strategic umbrella. Companies share technology, engage in joint marketing activities and benefit from a common management structure. Four RAD Group companies are traded on NASDAQ in the U.S.: Ceragon Networks, Radware, RADCOM, and Silicom. The others are privately held by the Group's founders and several venture capital firms.

History The RAD Group was founded by brothers Yehuda (1942–2024) and Zohar (1949–2023) Zisapel, in Tel Aviv, Israel. Both brothers studied electrical engineering at the Technion – Israel Institute of Technology. Yehuda started his career in the 1960s working for Motorola Israel but in 1973 decided to start his own business importing and distributing computer networking equipment, a company called Bitcom. Later Yehuda parted company with his initial business partner and started a new company, Bynet. The company's main business was distributing Codex Corporation products, and the company soon became a market leader in Israel. In 1977 Codex Corporation was acquired by Motorola, but due to its success Bynet maintain the distribution rights for its products; however in 1981 Motorola decided not to renew the distribution agreement with Bynet, and Codex Corporation began to sell in Israel directly. The experience of losing the distribution rights of Codex made Yehuda realize that his business should never rely on one product line, and in 1981 he asked his brother, Zohar, to join him at Bynet to start working on the development of their products. They started a new company in a corner of the Bynet offices and gave it the name RAD Data Communications, RAD being the acronym of Research And Development. RAD's first successful product was a miniature (by 1980s standards) computer modem that did not require a separate power source, operating instead by utilizing power flowing over the telephone line. By 1985, RAD's annual revenues reached US$5.5 million. RAD Data Communications is now the largest company in the RAD Group. In 1985, RAD provided initial funding and support to entrepreneur Benny Hanigal to start LANNET Data Communications, which developed a pioneering Ethernet switch, one of the first to offer Ethernet switching over simple twisted pair telephone cables rather than expensive coaxial cables. In 1991 LANNET had an initial public offering on NASDAQ, but in 1995, as their market was consolidating, it was decided to merge with Madge Networks, in a deal valuing LANNET at $300 million USD. By the end of 1995, the merged Madge-LANNET had 1,400 employees and achieved revenues of more than $400 million, but throughout 1996-1997 there were disagreements about strategy. Benny Hanigal left the company and joined the Israeli Venture Capital fund Star Ventures. In late 1997 Madge Networks spun off its Ethernet division into a separate subsidiary, once again named LANNET, and then sold it to Lucent Technologies for $117 million in July 1998. During the 1990s the RAD Group was involved in establishing 12 different technology companies. Some became publicly listed companies on NASDAQ and some were later sold to other companies. The group typically has a similar approach for starting new ventures: a business idea of an entrepreneur (an existing company employee or an outsider) or from the company's management team forms the basis of a start-up. Initial funding is provided by the company together with other venture capital funds. In this way companies such as: RADCOM was established in 1990 and received funding from Star Venture and Pitango Venture Capital funds and Radvision in 1992, which was founded by Ami Amir and Eli Doron and received external funding from Evergreen and Clal venture capital funds, as well as from Siemens.

Importance According to research conducted by Prof. Shmuel Ellis, Chair of the Management Department at Tel Aviv University's Faculty of Management, together with Prof. Israel Drori of the School of Business Administration at the College of Management Academic Studies and Prof. Zur Shapira, Chair of the Management and Organizations Department at New York University, the RAD Group has been "the most fertile ground" for creating Israeli entrepreneurs, having produced 56 "serial entrepreneurs" who established more than one start-up each. RAD Group "graduates" were responsible for the establishment of a total of 111 significant hi-tech initiatives.

Awards and recognition RAD Group companies have won many awards including from Business Red Herring, the Fierce Innovation Cybersecurity Award, the Internet Telephony Conference Best-in-Show Award, the Network Virtualization Industry Award, Telecom Asia's Reader's Choice Award, multiple Carrier Ethernet Awards, and Editor's Choice Awards from industry magazines such as Network Computing. In 2005, RAD Group was ranked 14 on the list of "The 29 Best Business Ideas in the World" by Business 2.0 magazine in August 2005.

RAD Group Companies The RAD Group currently consists of 10 companies, four of which are traded on the Nasdaq stock market. The group's total revenue in 2016 was $1.328 billion.

Bynet - system integrator, established 1973 RAD Data Communications - access solutions for carriers and corporate networks, established 1981 Silicom Connectivity Solutions - hi-end adapters for servers and security appliances, established 1987 RADCOM - providers of monitoring, analysis and troubleshooting systems for Next Generation networks, established 1991 Ceragon Networks - wireless broadband, established 1996 (as Giganet) Radware - intelligent application switching, established 1997 Radwin - broadband wireless solutions, established 1997 PacketLight Networks - DWDM/OTN solutions for fiber optic networks and data center interconnect, transporting high rate data, storage, video, and voice applications, with optional Layer-1 encryption, established 2000 Radiflow - cyber-security solutions for ICS/SCADA, established 2009 SecurityDAM - detection and mitigation of Distributed Denial of Service (DDoS) attacks, established 2012

Former members Former members of the RAD Group include:

… excerpt ends here. Continue reading the full article.

Illustrations

RAD Group: RAD Group headquarters, in the Ramat HaHayal neighborhood of Tel Aviv
RAD Group headquarters, in the Ramat HaHayal neighborhood of Tel Aviv

Worked examples

Example 1 — a first encounter with RAD Group

Start with the simplest possible case. Write down what RAD Group claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to RAD Group before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about RAD Group ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of RAD Group

In research
RAD Group appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses RAD Group in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
RAD Group is common in secondary-school and first-year university syllabi. It links to neighbouring topics Companies listed on the Nasdaq, Computer hardware companies, Electronics companies of Israel, so understanding it makes those chapters shorter.
In everyday life
Look for RAD Group outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study RAD Group in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what RAD Group means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain RAD Group out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is RAD Group in simple terms?

RAD Group is a number of independent companies that develop, manufacture and market solutions for diverse segments of the networking and telecommunications industry. Each company operates independently, without a holding company, but is guided by the group founders under a collective strategic umbr…

Why does RAD Group matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study RAD Group?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on RAD Group.

Tags

  • Companies listed on the Nasdaq
  • Computer hardware companies
  • Electronics companies of Israel
  • Manufacturing companies based in Tel Aviv
  • Networking hardware companies
  • Technology companies of Israel
  • Telecommunications equipment vendors

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