computer science

Lixia Zhang

Lixia Zhang 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 Lixia Zhang rather than just read about it. In short: Lixia Zhang (Chinese: 张丽霞) is the Jonathan B. Postel Professor of Computer Science at the University of California, Los Angeles.

Key takeaways

Lixia Zhang 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 Lixia Zhang to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Lixia Zhang from memory before moving on to harder problems.

Reference excerpt

Lixia Zhang (Chinese: 张丽霞) is the Jonathan B. Postel Professor of Computer Science at the University of California, Los Angeles. Her expertise is in computer networks; she helped found the Internet Engineering Task Force, designed the Resource Reservation Protocol, coined the term "middlebox", and pioneered the development of named data networking.

Biography Zhang grew up in northern China, where she worked as a tractor driver on a farm when the Cultural Revolution closed the schools. She earned a master's degree in electrical engineering in 1981 at California State University, Los Angeles, and completed her doctorate at the Massachusetts Institute of Technology in 1989, under the supervision of David D. Clark. After working as a researcher at Xerox PARC, she moved to UCLA in 1996. She and her husband, Jim Ma, have two sons. They reside in Sherman Oaks.

Contributions Zhang was one of the 21 participants in the initial meeting of the Internet Engineering Task Force, in 1986, the only woman and the only student at the meeting. In the IETF, her initial work concerned routing, although her thesis research was instead on quality of service. She was also a member of the Internet Architecture Board, from 1994 to 1996 and again from 2005 to 2009. During the 20th anniversary for the initial IETF meeting in 2006, Zhang was interviewed by the IETF Journal, published on May 7, 2006. A protocol she designed for changing the settings in an experimental network setup became the basis for the Resource Reservation Protocol. Zhang's paper on the protocol, "RSVP: A New Resource ReSerVation Protocol" (with Steve Deering, Deborah Estrin, Scott Shenker, and Daniel Zappala, IEEE Network 1993) was selected in 2002 as one of ten landmark articles reprinted with commentary in the 50th-anniversary issue of IEEE Communications Magazine. In 1999 Zhang coined the term "middlebox" to refer to a computer networking device that performs functions other than that of a regular Internet Protocol router. Examples of middleboxes include firewalls and network address translators. Her term has been widely adopted by the industry. Beginning in 2010 she has been the leader of a multi-campus research project concerning named data networking.

Awards and honors In 2006, Zhang became a Fellow of both the Association for Computing Machinery and the Institute of Electrical and Electronics Engineers for contributions to the architecture and signaling protocols in packet switched networks. In 2009, she won the IEEE Internet Award. In 2012, she was named to the Postel Professorship. In 2014, Zhang is featured in the Notable Women in Computing cards. Her picture appeared on the four of diamonds in a pack of playing cards featuring 54 notable women in technology. In 2020, she won the 2020 SIGCOMM Lifetime Achievement Award, while in 2021 she was inducted to the Internet Hall of Fame. In 2025, she was elected to the National Academy of Engineering.

References

External links Official website Lixia Zhang publications indexed by Google Scholar Lixia Zhang at DBLP Bibliography Server

Worked examples

Example 1 — a first encounter with Lixia Zhang

Start with the simplest possible case. Write down what Lixia Zhang 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 Lixia Zhang 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 Lixia Zhang 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 Lixia Zhang

In research: Lixia Zhang 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 Lixia Zhang 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: Lixia Zhang is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1951 births, 21st-century American women, American computer scientists, so understanding it makes those chapters shorter.
In everyday life: Look for Lixia Zhang 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 Lixia Zhang in 20 minutes

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

Frequently asked questions

What is Lixia Zhang in simple terms?

Lixia Zhang (Chinese: 张丽霞) is the Jonathan B. Postel Professor of Computer Science at the University of California, Los Angeles.

Why does Lixia Zhang 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 Lixia Zhang?

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 Lixia Zhang.