Data communication quiz 1

OSI model has -------- layers

• 5

• 6

• 7

• 8

Which one of the following is not the component of data communication?

• Sender

• Receiver

• Error control

• Protocol

TV broadcasting is an example of -------- communication

• Simplex

• Half duplex

• Duplex

• Full duplex

failure rate of network components is ------

• Security

• Reliability

• Efficiency

• Performance

How many links are needed to connect five devices in mesh topology?

• 8

• 9

• 10

• 11

Structure of data is called as ------------

• Timing

• Syntax

• semantics

• Format

---

---

---

• --interprets the meaning of the bits

• Syntax

• semantic

• timings

• format

Which topology is scalable?

• Mesh

• Bus

• Star

• tree

What is the principle of fiber optics communication?

• radiation

• Refraction

• Total internal refelection

• diffraction

Name the optical source used in single mode communication

• Laser

• LED

• bulb

• None