Exam 200-301 topic 1 question 27 discussion

For lazy people who hate this kind of stupid question in CCNA but has a heart of curiosity, I do some simple research for you. Please correct me if any incorrect stuffy 1.There are 3 kind of wiring mainly when we talk about networking: Fiber, Coaxial cable, twisted pair. The last 2 are Copper wiring 2. BNC Connector is for Coaxial Cable, so A is wrong 3.the structure of fiber is: Jacket encase Buffer, Buffer encase Cladding, Cladding encase core. We uses light to transmit data through the core. Therefore B and D are right, C is wrong 4. RJ45 is a connector is for twisted pair, so E is wrong

Ref: Core (optical fiber) - Wikipedia “The core of a conventional optical fiber is the part of the fiber that guides the light. It is a cylinder of glass or plastic that runs along the fiber's length. The core is surrounded by a medium with a lower index of refraction, typically a cladding of a different glass, or plastic. Light travelling in the core reflects from the core-cladding boundary due to total internal reflection, as long as the angle between the light and the boundary is greater than the critical angle. …” A. A BNC connector is used for fiber connections A BNC connector is a connector used for coaxial cable networking. Wrong answer. B. The glass core component is encased in a cladding Correct answer. C. The data can pass through the cladding Wrong answer. D. Light is transmitted through the core of the fiber Correct answer. E. Fiber connects to physical interfaces using RJ-45 connections A RJ-45 connector is a modular connector commonly used to terminate twisted pair and multi-conductor flat cable. Wrong answer.

What are two characteristics of fiber optic cables? Answers: B & D

B & D are correct

BD is the answer

the question makes no sense. They are not differences but features of Optical fibre cabling

B and D. This is not a difficult question, but it is rather poorly worded.

While B is a correct statement, it is not a "difference" between copper and fiber. Someone with an elementary education wrote this question.

I thought C because current passes through the outer conductor in a coaxial cable but I guess that doesn't count as cladding

B & D are correct

i guess all OSI layeres are covered...:) Answers are correct here!

Yes it is, I had this question last time