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4 years ago

What is the purpose of the backoff on Ethernet networks?

Computers and Technology

1 answer:

stellarik [79]4 years ago

8 0

Answer: Please see below as the answer is self-explanatory.

Explanation:

In the original Ethernet standard, IEEE 802.3, the method used to deliver packets within a Ethernet network, is called CSMA/CD, and the acronym includes all the Ethernet features in brief.

Let's explain the different parts of the acronym.

CSMA= Carrier Sense Multiple Access.

This means that when any computer in the network (with no privileges for nobody) has a packet to transmit, it first "listen"if the network is idle. If it is the found condition, deliver the packet, and wait for an acknowledgement.

If past a given time, the ACK is not received, assumes that the packet was lost, due to a collision with another packet coming from another computer (this can happen because the packets don't travel instantaneously from one host to another, so one machine could have started to transmit before the another one could sense this fact).

This process is described by the other part of the acronym:

CD = Collission Detection

In order to avoid this type of problem, before trying to resend the packet, it waits some time, which is called "backoff".

This time increases exponentially each time that it is not possible to send a packet successfully, in order to try to find a moment in which finally the network be clear.

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Counting calculus students. About A university offers 3 calculus classes: Math 2A, 2B and 2C. In both parts, you are given data

OleMash [197]

Answer:

Part (a) n(A∩B∩C) = 4

Part (b) n(A∪B∪C) = 54

Explanation:

n(A) = no. of students who took Math 2A

n(B) = no. of students who took Math 2B

n(C) = no. of students who took Math 2C

n(A∩B) = no. of students who took both Math 2A and 2B

n(A∩C) = no. of students who took both Math 2A and 2C

n(B∩C) = no. of students who took both Math 2B and 2C

n(A∩B∩C) = no. of students who took all three Math 2A, 2B and 2C

n(A∪B∪C) = no. of total students in a group

∩ represents Intersection and ∪ represents Union

Part (a)

n(A∪B∪C) = n(A) + n(B) + n(C) - n(A∩B) - n(A∩C) - n(B∩C) + n(A∩B∩C)

Where n(A∩B∩C) represents the number of students who took all three classes and n(A∪B∪C) represents the total number of students in group A

157 = 51 + 80 + 70 - 15 - 20 - 13 + n(A∩B∩C)

Re-arranging the equation to solve for n(A∩B∩C) since we want to find out those students who took all three classes

n(A∩B∩C) = 157 - 51 - 80 - 70 + 15 + 20 + 13

n(A∩B∩C) = 4

So there are 4 students in group A who took all three classes

Part (b)

n(A∪B∪C) = n(A) + n(B) + n(C) - n(A∩B) - n(A∩C) - n(B∩C) + n(A∩B∩C)

This time we are given n(A∩B∩C) students who took all three classes and want to find n(A∪B∪C) that is total number of students

n(A∪B∪C) = 28 + 28 + 25 - 11 - 9 - 10 + 3

n(A∪B∪C) = 54

So there are total 54 students in group B

8 0

3 years ago

Computers that communicate over a network must follow certain ___ to ensure that the transmission is sent properly and understoo

natulia [17]

Computers that communicate over a network must follow certain protocols or rules, in order to ensure that data are transmitted properly and understood.

<h3>What is a protocol?</h3>

A protocol can be defined as a formatted blocks of data that have been designed and established to obey a set of standard rules (conventions) such as the Transmission Control Protocol and Internet Protocol (TCP/IP).

In Computer networking, all computers and other network devices that communicate over a network must follow certain protocols or rules, in order to ensure that data are transmitted properly and well understood by end users.

Read more on protocol here: brainly.com/question/17387945

8 0

2 years ago

Drag each tile to the correct box.

vekshin1

Answer:

1. Spreadsheet software.

2. Word processor.

3. Database software.

4. Multimedia software.

Explanation:

A software can be defined as a set of executable instructions (codes) or collection of data that is used typically to instruct a computer on how to perform a specific task and solve a particular problem.

Simply stated, it's a computer program or application that comprises of sets of code for performing specific tasks on the system.

Basically, the various type of softwares used on computers to perform specific functions include the following;

1. Spreadsheet software: it can be used to create tables with embedded calculations. A spreadsheet can be defined as a file or document which comprises of cells in a tabulated format (rows and columns) typically used for formatting, arranging, analyzing, storing, calculating and sorting data on computer systems.

2. Word processor: it can be used to format or edit .doc files. Some examples of word processors are Notepad, Microsoft Word, Sublime text, etc.

3. Database software: it can be used to store data in ordered form. Thus, it allows computer users to efficiently retrieve and manage their data with an appropriate level of security. These records are stored and communicated to other data user when required or needed.

4. Multimedia software: it can play .mpg and .mp3 files. A multimedia software refers to a software that is designed and developed to accept, utilize and combine various file formats such as audio, video, text, animation effects, etc.

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3 years ago

Which part of an I-statement involves a description of your needs or feelings? The part of an I-statement involves a description

MrMuchimi

The part of an I-statement that involves a description of

your needs or feelings is the Feelings Statement.

The feelings statement is a description of your feelings that is linked to a

particular situation. Vague feelings often create frustration in the listener.

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3 years ago

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