Physical layer
9 important questions on Physical layer
- What are the advantages of fiber optics over copper as a transmission medium?
Greater bandwith,costs,migration,standards,design,immunity & reliability,security, attenuation and greater distance
- List five tasks that a layer can perform. Is it possible that one (or more) of these tasks could be performed by two (or more) layers?
2.flow control,
3.segmentation and reassembly,
4.multiplexing,
5.connection setup.
- What arethefivelayersin theInternet protocol stack?What aretheprincipal responsibilities of each of these layers?
transport layer
network layer
link layer
physical layer
- Higher grades + faster learning
- Never study anything twice
- 100% sure, 100% understanding
For my 1st exam I got a C. Then, I started looking for ways to learn better and I came across Study Smart. Since then I have scored a A+, A, A- and another A. I highly recommend it to everyone who wants to hear it. I am so happy with it!!
I was struggling to finish all my first-year subjects for 3 years. Then I discovered Study Smart, which helped me to finish all of them within 3 months.
Because of StudySmart, things are going well in many ways. Before, I always had study stress and no time for anything. Now I feel calm and confident (because of the program). I used to score a B, now I usually score an A or A+.
Hey Chris, I really want to thank you very much for developing the platform, I usually got around C for my exams, now I scored an A+, an A and a A- !!
Since using Study Smart, my average has increased significantly. I even completed a statistics course with a A+ while I'm bad at statistics. I took on extra courses this year, because of Study Smart. Thanks so much!
Ever since I started studying with StudySmart I passed all my exams !!! No more re-sits!! At first, I was happy with a pass and now I only get good grades. Many thanks!
I aced all the courses I studied with Study Smart. For law, I first scored a D, and now an A! I’m 100% sure that I’ll pass all the courses I study with Study Smart.
I always thought I studied well. My grades were fine. I could never have imagined that applying these study skills would have such a huge and direct impact on my grades, my speed and the pleasure I have in learning.
For the first time, I finally feel totally confident about the way I learn. I have the perfect overview and make great progress in terms of speed and the grades I get. Thanks, Chris!
I immediately started to enjoy learning again, and my grades soared. All of a sudden, everything went better. I highly recommend Study Smart to all students..
Being able to create my materials online made the process of studying so much smoother and quicker. I no longer have to spend a huge amount of my time on creating my summaries.
At first, my notes were a mess. Now I use Study Smart to take my notes in a perfectly structured way. It helps me to save a lot of time and do other things I enjoy.
Students that study with Study Smart get better grades. The system applies all the learning methods in such a way that both well-performing students and students who struggle perform much better.
Hi Chris, I would like to thank you very much. Last year I scored C on a course, and this year I got an A+ thanks to your method! Thank you very much!
The largest effect is that my child is more enthusiastic about school! Every parent wants their children to be happy at school, Study Smart made it happen.
In high school, I failed several exams, and that has really changed now. I actually needed this tool very much back then. Since I started studying with StudySmart, I haven't had any D's. My average score is now an A and those are results I would have never had in the past
With my old method, I passed only 3 out of 8 courses. Since I started taking my notes digitally in Study Smart, I have passed all my courses on the first try. For me, StudySmart takes away the stress of wondering if I will pass or not.
Thanks to StudySmart, I passed all my exams, and with better grades than before! On top of that, I have mastered a very good study method now, which I am confident will help me earn my degree.
- Why are standards important for protocols?
Standards are important for protocols so that people can create networking systems and productsthat interoperate.
- What is an application-layer message?A transport-layer segment?A network layer datagram?A link-layer frame?
Application-layer message: data which an application wants to send and passed onto the transport layer;
transport-layer segment: generated by the transport layer and encapsulates application- layer message with transport layer header;
network-layer datagram: encapsulates transport-layer segment with a network-layer header ;
linklayer frame:encapsulatesnetwork-layer datagramwithalink-layer header.
- Which layers in the Internet protocol stack does a router process?Which layers does a link- layer switchprocess?Whichlayersdoesahost process?
Routers process layers 1 through 3. (This is a little bit of a white lie, as modern routerssometimesact asfirewallsor cachingcomponents,andprocesslayer four aswell.) Link layer switches process layers 1 through 2. Hosts process all five layers.
What isthe48-bit Ethernet addressof your computer?
Example:TheEthernet addressofmycomputer is00:09:5b:61:8e:6d
- What isthe48-bit destinationaddressintheEthernet frame?What devicehasthisasitsan Ethernet address(Re-read pages 468–469 in the text and make sure you understand the answer here).
Example:Thedestinationaddressis00:0c:41:45:90:a8.It istheaddressofmyLinksysrouter, whichisthelinkusedtoget offthesubnet.
- What is the destination address in the Ethernet frame?Is this the Ethernet address of your computer?Justify your answer.
Example: Thedestination address00:09:5b:61:8e:6d istheaddressof mycomputer.
The question on the page originate from the summary of the following study material:
- A unique study and practice tool
- Never study anything twice again
- Get the grades you hope for
- 100% sure, 100% understanding
