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What is the difference between a ‘leased line’ and a ‘dedicated line’ when you are connecting to the Internet? Which are you most likely to use at home? Which are you most likely to use at school / work?

Most application layer protocols use ports. What is a port?

Who are IANA and what is their role within managing the Internet?

CSMA / CD stands for Carrier Sense Multi Access with Collision Detection. ‘Carrier Sense’ tells us that systems using this listen for existing traffic on a wire before attempting to transmit. ‘Multi Access’ tells us that there are likely to be multiple nodes communicating on the medium which must compete for bandwidth. If two nodes do transmit at the same time, the CD system comes into play. How does it manage the situation and help to prevent further collisions? Why is CSMA / CD sometimes referred to as a ‘backoff algorithm’?

CSMA / CA (Collision Avoidance) is another mechanism for managing network access. How does it differ from CSMA / CD?

Describe the operation of a Token Ring network with particular emphasis on how a token is used to avoid collisions by traffic from competing nodes.

Q1.what are the effects does ethanol gives to the environment when it is used as an altenative source of fuel?

Q2. if existing engine technology could be readily adapted

Since i was young i really really want to learn how to play a acoustic guitar, but my family isn't that rich to give me the opportunity to have guitar lessons, i understand that and that's why i want to teach myself on how to play a guitar. I have a laptop that is fast enough to watch videos in Youtube.

PLEASE help me how to learn to play a guitar, please give me website or videos where i can learn everything that i need to know. I have lots of time to practice before the start of school year.

Now im 16 and i know its too late to start doing this but i really really want to learn, this is one of my dream to play a guitar and this will be one of my biggest achievement in life. So please help me

I just want to say THANK YOU VERY MUCH in advance :D

Im currently at yr11 in the UK and I'm planning to take Biology, Chemistry and 2 BTEC ICT as my A Lvls in Post16/ T1-T2 next year. I dont know is any of these choices that I made will help me to take courses in nursing.

I you can please give me more information

Thanks :)

" how does changing the length of a Resistance wire affect its resistance?"

why fat, sugar, starch release a lot of energy when they are combusted or burn

explain in a brief way

the sex of a developing human embryo is controlled ny a gene that codes for the production of the proteein called testis of a protein called Testis Determining Factor(TDF)

Q1. Explain how Tdf controls the sex of a developing embryo?

Q2. Which cromosomes do you find the gene that for TDF if found on?

fill in the blanks:

everyone has one pair of chromosomes that determine were there they are male or female . These chromosomes are called the ........... chromosomes. There are two types, the ........... chromosomes, which can be found in eggs or sperm, and the ........ chromosomes, which if found in .........cells but never in ..........cells.

mr. and mrs kowalski have 3 sons and mrs is pregnant with the Fourth child. what is the chance of this baby being boy?

50% 75% 10% 25%

Fill in the blanks.

..................decay in the .......... produces a lot of ......., which causes the ...... to flow in......... currents. The current drive the movement of the Earth's ..........plates.

use this to answer the question:

solid, heat, tectonic, mantle, convection, crust ,radioactive, core

Q2. Data

Date Magnitude

12th dec 1632 6.9

14 jul 1721 7.2

23 may 1810 3.8

12 jan 1812 8.6

14 feb 1990 7.4

Q2. suggest why the 1812 earthquake was unexpected?

Q2a. based on the data , for what year would you predict the next earthquake?

Q2b. why it it difficult to predict when an earthquake is going to happen?

Give some example of the 3 primary and 3 secondary effect of a volcanic eruption

primary is the effect after a volcano eruption, the effect that could happen in a short period of time

secondary is the effect that could last for long period of time like destroyed houses

How if humans didn't evolve are we still able to reach the stage that we have now, like studying the human body,going to moon ect

can you give me some information about this religion Seventh Day Adventists

please give me the website where you find it

10 points for the best answer

The URL of the picture: http://tvnewslies.org/donate/images/uploads/Inconv...

help me to find the:

Tone

Texture

Form

give me why this events help to cause world war 2

1. The Wall Street Crash

2. Hitler becomes Chancellor of Germany

3. The Failure of the League of Nations

4. Hitler sends troops into the Rhineland

5. Germany annexez Austria

6. The Munich Agreement

7. Hitler takes over Czechoslovakia

8. Hitler signs the Nazi-Soviet Pact

9. Germany invades Poland

10. American policy of Isolationism

I need to know this following details

Full Name:

Also Know As:

Nationality:

Born:

Date of Birth:

Parents:

Early Life:

Political Party:

Political Beliefs:

Is He Dangerous?

1. what we mean by magnetic field?

2. 4 names for magnetic filed materials?

3. what material that suitable for the bar magnet?

4.a plastic material is now brought close to end of the north pole . Explain what happen to the plastic?

1.why it is important for the planet that the processes of respiration and photosynthesis stay in balance?

2. the worlds forest are being chopped down at an alarming rate.

2(a) what effect will this have on the balance between photosynthesis and respiration?

2(b) besides leaving the trees alone, what else could be done to try to "keep balance"?

3. why can too much water be as bad as no water for plants roots?

4.what are the 3 minerals are essential for good plant growth? state why they are needed.

matthew investigating how the strength of an electromagnet depends o the electric current passing through the coil of the electromagnet.

Question(A) name two other factors that will affect the strength of the electromagnet.

Question(B) he is going to measure the number of pins the electromagnet can pick up at different current values. How will he carry out fair test?