Answer:
Source MAC address in the header
Explanation:
Store-and-Forward Switching is a Layer 2 switching method and it means that the LAN switch copies each complete frame into the switch memory buffers and computes a cyclic redundancy check (CRC) for errors. CRC is an error-checking method that uses a mathematical formula, based on the number of bits (1s) in the frame, to determine whether the received frame is errored. If a CRC error is found, the frame is discarded. If the frame is error free, the switch forwards the frame out the appropriate interface port
The Ethernet frame uses the FCS (Frame Check Sequence) for error checking when the store-and-forward switching method is in use.
When the store-and-forward method of switching is in use, the part of the Ethernet frame used to perform an error check is the FCS (Frame Check Sequence).This FCS, a field within the Ethernet frame, contains error-checking information that allows the receiving device to detect any transmission errors.By comparing this FCS value with the received data, the device can determine if the information in the frame is accurate or if errors have occurred.____________ is used by IM and other applications that provide voice services over lower-speed digital circuits.
pulse code modulationb.
adaptive differential pulse code modulationc.
Voice conversationd
code modulatione.
phase modulation
Answer:
The correct answer is Adaptive differential pulse code modulation
Explanation:
Adaptive differential pulse code modulation (ADPCM) is a variant of differential pulse-code modulation (DPCM) that varies the size of the quantization step, to allow further reduction of the required data bandwidth for a given signal-to-noise ratio. The output data rate can be dynamically adjusted between 16 kbit/s and 64 kbit/s in these applications.
A network administrator needs to protect a router against brute force login attempts. What is the correct login-block-for command syntax to disable login for 3 minutes if more than 3 failed attempts are made within a 2 minute period?
Answer:
The correct answer is by login the block-for 180 attempts 3 within 120 it protects a router against brute force login attempts.
Explanation:
The brute force login attempt is the type of attack in which the attacker try to put the many passwords in the login window. It put many passwords by guessing them. In the Brute force login attempt the attacker checking all the possible passwords. The network administrator protects the router by login the block-for 180 attempts 3 within 120. This login block protects a router against brute force login attempts.During class, your professor mentions an interesting article about Obama's networking in Iowa. From the Library homepage's list of Articles Indexes and Databases (Links to an external site.), find the Sociological Abstracts index and search it using these terms: presidential networking and Iowa to locate an article published in Feb 2010.
Subject terms are useful for finding similar articles on your topic. Which one of the following is a subject term used for this article? (Remember - if you are off-campus you may need to login to the index with your NetID).
internet T/F
Answer:
True.
Explanation:
At the time of attending the class, the professor discusses an informative article regarding Iowa's networking with Obama. From those in the collection of Publications Indexes and Databases (References to an external site) of it's Libraries webpage, identify and scan the Sociological Analyses index using such terms: Political networking and Iowa to identify an article in Feb 2010.
Thus, topic words are helpful to identify related articles on the topic for students. Internet is the reference used for this article.
What type of system security malware allows for access to a computer, program, or service without authorization?
Answer:
"backdoor" is the correct answer for the above question
Explanation:
The backdoor is a type of attack which is done by the type of backdoor programs to remotely access the computers without the authorization of the user of the computer.It is inserted on the computer with the help of the internet and accessed the computer without using authorization techniques.The above question asked about the virus which is used to access the computer without the permission of the right use of the system. Hence the answer is backdoor which is defined above.17. Consider a scenario in which you develop a C++ program on a computer that has a Pentium processor and compile the program into the corresponding machine language. What step should you take to run the same program on a computer that has a different processor?
Answer:
"There is need to compile the program again on a different processor." is the correct answer for the above scenerio.
Explanation:
The c++ program is a platform-dependent program because it is covered on a machine language directly and machine language programs are dependent programs. While in the case of java programming there is an object code that is converted from the class code and it is compatible with the other machine.The dependent program states the meaning that if a program is developed by the one machine then it can not be executed on the other machine The above question asked about the compiled c++ program that it can execute on another machine, which answer is no. if a user wants to execute the c++ program for the other processor then, he needs to compile the program again on the other machine.
Write the code to call a function named send_variable and that expects a single int parameter. Suppose a variable called x refers to an int. Pass this variable as an argument to send_variable.
Answer:
#include <iostream>
using namespace std;
//function definition
void send_variable(int num){
cout<<"The Number is "<<num<<endl;
}
// main function begins here
int main()
{
int x =15; //declares an it variable and assigns 15
// Calls the function send_variable
send_variable(x);
return 0;
}
Explanation:
Using C++ programming language we created the function called send_variable and in the main function we call this function which only displays the value of an int variable passed unto it.
Which two fields in an Ethernet frame help synchronize device communica- tions but are not counted toward the frame’s size?
Final answer:
In an Ethernet frame, the Preamble and Start Frame Delimiter (SFD) are used for synchronization but are not included in the frame size calculation.
Explanation:
The two fields in an Ethernet frame that help synchronize device communications but are not counted toward the frame’s size are the Preamble and the Start Frame Delimiter (SFD). The Preamble consists of 7 bytes (56 bits) and is designed to allow the receiving system to synchronize its receiver clock with the incoming data stream.
The SFD is 1 byte (8 bits) and signals the beginning of the frame to the receiving device. Both of these fields are essential for preparing the network devices for incoming data but are not considered as a part of the frame's actual payload or size.
Final answer:
The Preamble and Start Frame Delimiter (SFD) are the two fields that help synchronize device communications in an Ethernet frame, which are not included in the frame's size.
Explanation:
The two fields in an Ethernet frame that help synchronize device communications but are not counted toward the frame's size are the Preamble and the Start Frame Delimiter (SFD).
The Preamble consists of seven bytes (56 bits), each containing the pattern 10101010, which allows devices on the network to establish and synchronize their clock rates. The SFD marks the end of the preamble and is one byte (8 bits) long, with the pattern 10101011, which signals the beginning of the actual Ethernet frame.
which of these is a way hexadecimal is commonly used in computing?
A. represent IPv6 network address.
B. communicate with the CPU.
C. exchange data with peripherals.
D. to represent sound waves
Answer:
represent IPv6 network address.
Explanation:
Hexadecimal number is the representation of large data into small chunk. each number in hexadecimal is replaced by 4 bits of data. With the help of this number system we can reduce the size of the total data.
IPv6 address consist of hexadecimal number. If we represent this address in binary it will utilize 16 x 8 = 128 bits. 128 bit address is too long.
So, we convert the 18 bits data into hexadecimal. This conversion make this address smaller. To represent the IPv6 address, we usually use hexadecimal number representation.
Hexadecimal is commonly used in computing to represent IPv6 network addresses. It allows for a compact representation of large numbers. It is not typically used to interface directly with CPUs or peripherals and does not represent sound waves.
Explanation:The hexadecimal system is commonly used in computing in a few different ways, and one of these ways is to represent IP versions 6, known as IPv6 network addresses. Unlike the binary and decimal systems, hexadecimal can represent large numbers in a more compact form, which is why it's often used for this purpose in computer systems. Hexadecimal is not typically used to communicate with CPUs or exchange data with peripherals, and it does not play a role in representing sound waves.
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Simone frequently downloads mobile apps from Amazon Appstore. What operating system does she have on her smartphone?
She has the Android operating system if she’s frequently downloading mobile apps from the Amazon App Store as opposed to IOS which is the Apple operating system and computer.
Thus, The most crucial piece of software that runs on a computer is the operating system. It controls the memory, operations, software, and hardware of the computer.
You can converse with the computer using this method even if you don't understand its language. A computer cannot function without an operating system.
Any computer you buy often comes pre-loaded with an operating system. The default operating system that comes with computers is used by the majority of users, however it is possible to update or even switch operating systems.
Thus, She has the Android operating system if she’s frequently downloading mobile apps from the Amazon App Store as opposed to IOS which is the Apple operating system and computer.
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" In which software generation did the distinction between systems programmers and other programmers first surface?"
Answer:
a. first
Explanation:
Important definitions.
System programmers: we are defining the process of creating a program, which allows the user to interact from a single user-friendly interface.
Programmer: uses different programming languages (writes code) to develop these programs.
Software Developers: Software engineers usually possess the same skills as a programmer, and technically they also "program." It focuses on the development of customized solutions, products or creations.
When an administrator attempts to perform a task that requires administrative access, the system switches the account from the standard user token to the administrative token, which is known as which of the following?
a. Elevated Approval Mode
b. Admin Approval Mode
c. Credential Approval Mode
d. UAC Mode
Answer:
B. Admin approval mode.
Explanation:
The system switches the account from the standard user token to the administrative token when performing tasks that require administrative access, Therefore The Correct Option Is b. Admin Approval Mode
Admin Approval Mode (Option b) is part of the User Account Control (UAC) framework in Windows. It ensures that even administrators run most applications and tools with standard user privileges instead of full administrative privileges, which helps in preventing unauthorized changes to the system.
For example, when you try to install new software or change system settings that could affect other users, the system prompts you for confirmation or an additional password. This switch from a standard user token to an administrative token helps maintain security while providing administrative capabilities only when necessary.
To get a page from the Web, a user must type in a URL, which stands for: a. Unknown Resource Locator b. Unknown Router Location c. Uniform Router Location d. Uniform Resource Locator e. Uniform Resource Library
Answer:
Hey! The answer you're looking for is D. Uniform Resource Locator.
Which microphones are considered to have the best quality?
External
Headset
Internal
USB
Answer:
External Microphones
Explanation:
External Microphones provide smoother sound they are used in podcasts, studios, and radio stations.
Answer:
External.
Most internal and Headset mics are made of cheap microphones that are terrible quality. USB mics on the other time have a bad time responding.
Have a great day!
Assume that the demand curve for DVD players shifts to the left and the supply curve for DVD players shifts to the right, but the supply curve shifts less than the demand curve. As a result, Group of answer choices a.both the equilibrium price and quantity of DVD players will decrease. b.the equilibrium quantity may increase or decrease. the equilibrium price of DVD players may increase or decrease; the equilibrium quantity will increase. c.the equilibrium price of DVD players will decrease; the equilibrium quantity will increase.d.the equilibrium price of DVD players will decrease;
Answer:
a.both the equilibrium price and quantity of DVD players will decrease
Explanation:
When the amount required or given varies, even if the price stays the same, a move in the demand or supply curve occurs. Changes in the curve of demand mean that the initial relationship of production has shifted so that demand of quantity has a factor apart from cost influenced
A right shift change of the supply curve shows an increase in supply and, on equal footing, the equilibrium price decreases.
Once the demand curve shifts to the left, the demand decreases.
Where is the typical location of a touchpad inside of a laptop?
Attached to the keyboard
Next to the RAM
Under the bottom panel
Under the case
Answer:
Attached to the keyboard
Explanation:
Touch pad is the type of the mouse that is located on the laptop just near the keyboard or we can say that it is attached to the keyboard of the laptop. It has almost two buttons that are used for the purpose of Left and Right Click.
The touch pad is used to move the cursor to the required position on the screen of the laptop. This will work by just moving figure on the touch pad as the cursor move on the screen in the same direction of the finger..
_____ is a systems development technique that tests system concepts and provides an opportunity to examine input, output, and user interfaces before final decisions are made.
a. Modeling
b. Prototyping
c. Scrum
d. RAD
Answer:
Option b("Prototyping") is the correct answer for the above question.
Explanation:
Prototyping is a type of Model which follows the phases of SDLC and used to develop the software project.In this model only a copy of the software is developed and seen by the customer that the developer is developing the right thing or there may be any changes.The above question asked about the Model which is used to provide a copy of the software. That model is known as the Prototyping Model which is described above. Hence Oprion b (Prototyping) is the correct answer for the above while the other is not because:-Option 'a' states about Modeling which is not a model of SDLC.Option c states about Scrum, which does not provide the prototype to the customer.Option d states about RAD which is not the correct answer.A network technician incorrectly wired switch connections in your organization's network. It effectively disabled the switch as though it was a victim of denial of service attack. What should have be done to prevent this in the future?A. Install an IDS. B. Only use Layer 2 switches. C. Install SNMP on the switches. D. Implement STP or RSTP.
Answer:
The answer is D. Implement STP or RSTP.
Explanation:
STP (Spanning Tree Protocol) was built to serve as a remedy for network issues. Existing before switches were developed, it works as a substitute for a switch when a switch is wired incorrectly (as seen in the question) or when it fails. STP has two roles:
To serve as an alternative when there is network failure or changes.To block out issues caused by loops on a networkRSTP (Rapid Spanning Tree Protocol) was built to optimize the standard STP. When there is a topology change, spanning tree convergence is much faster than the standard STP.
To prevent network failure in the future, STP or RSTP should be implemented.
What two pieces of information would researchers need to have in order to calculate the rate of plate motion for seafloor spreading?
Answer:
Distance from the rift
Age of seafloor sample
Explanation:
____ helps determine what supplies are required for the value chain, what quantities are needed to meet customer demand, how the supplies should be manufactured into finished goods and services, and how the shipment of supplies and products to customers should be scheduled, monitored, and controlled.
Answer:
Supply Chain Management
Explanation:
Supply Chain Management (SCM) involves all activities that are carried out between the time the raw material becomes a finished product. It also to have a critical look into the activities in the supply-side of businesses to ensure that competitive advantage is achieved and customer value is maximized.
Supply Chain Management is categorized into five parts:
Planning or Strategizing: Proper planning and documentation is necessary for a successful supply chain process.Source: The location of the raw material must be identified bearing in mind its proximity to the factory or company.Production: The transition from raw materials to finished products must be monitored to ensure that standards are met.Logistics and Delivery: This stage is monitored to ensure that customer value is maximized.Return System: Monitoring and replacement of damaged or defaced goods are necessary goods.A newspaper wants to estimate the proportion of Americans who will vote for Candidate A. A random sample of 1000 voters is selected. Of the 1000 respondents, 526 say that they will vote for Candidate A. Which Excel function would be used to construct a confidence interval estimate?
Answer:
The correct answer to the following question will be "NORM.S.INV".
Explanation:
The NORM.IN.V function in Excel determines the opposite of the Cumulative Standard Distribution Function for just a value of x which is given, and the standard deviation and mean of the distribution provided. The probability of NORMINV(mean, probability, standard deviation).In Excel 2010, the standard. S. Inv function is new and is therefore not easily accessible in Excel's earlier versions.Therefore, NORM.S.INV is the right answer.
Which statement about dialogues is NOT correct? Select one: A. Users should be able to control the direction of speed of dialogues. B. Dialogues may appear automatically. C. Dialogues need to provide relevant, context-specific information for tasks. D. Dialogues should change with each use by a single use
Answer:
Option B is not correct
Explanation:
Dialogues become problematic when they appear automatically because of high level incompatibility
The incorrect statement about dialogues is: B. Dialogues may appear automatically.
What is a dialogue system?A dialogue system is also referred to as a conversational agent (CA) and it can be defined as a computer system that is typically designed and developed to converse with human beings. Also, a dialogue system makes use of textual information, graphics, speech, haptics, etc., on both its input and output channel.
Generally, all end users should be able to control the direction of speed of dialogues. However, dialogues shouldn't appear to end users automatically.
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Amazon uses a customer profiling system whenever a customer visits its website. Using this system, Amazon can offer products tailored to that particular customer's profile and buying pattern. What is Amazon using to achieve this competitive advantage?A. Rivalry.
B. Buyer power.
C. Product differentiation.
D. Substitute product.
Answer:
C. Product differentiation
Explanation:
-Rivalry refers to the competition between people or organizations when they have the same goal.
-Buyer power refers to the situation in which customers are able to have influence on things like quality and prices of the products offered by companies.
-Product differentiation refers to trying to differentiate a product or service from its competition to make it more attractive for the customer.
-Substitute product is a good that can be used instead of another one.
According to this, Amazon is using product differentiation to achieve this competitive advantage as it is offering products tailored to a particular customer which is an effort to make the product distinguish from the similar ones and get the customer to buy it.
What are two ways Google Ads can fuel your business goals?
A. Reach more users by placing ads on all search engines.
B. Get more of the right people to visit your website.
C. Enable premium membership subscriptions.
D. Increase online, in-app, in-person, and over-the-phone sales.
E. Cap the number of ads you pay for, based on your business.
Answer:
B. Get more of the right people to visit your website.
D. Increase online, in-app, in-person, and over-the-phone sales.
Explanation:
Google ads or adsense is a google advertising platform for organisations or individuals with the intent to advertise their products and services on the internet on a wide range of websites, with a limited subscription of video content, product listing and installed application for web users advertising services.
It uses data analytics and search engine optimization to determine the right users to advertise the products to and also increase online and in-application advertisement, and in-person and over-the-phone sales and advertisement.
You have been asked to decouple an application by utilizing SQS. The application dictates that messages on the queue can be delivered more than once, but must be delivered in the order that they have arrived, and also must allow for efficient, repeated polling of the queue. Which of the following options are most suitable?a. Configure a standard SQS queue and use long polling
b. Configure a FIFO SQS queue and enable long polling
c. Configure a FIFO SQS queue and enable short polling
d. Configure a standard SQS queue and use default polling
Answer:
Option B is the correct option.
Explanation:
When using SQS the user request to separate a query. The specification specifies that updates on the list may have been transmitted multiple times, but it must be transmitted throughout the sequence in which they appeared, and therefore should require secure, repetitive queue polling.
So, They configure a First In First Out SQS queue and allow long-polling which is suitable for AWS services.
A user called to inform you that the laptop she purchased yesterday is malfunctioning and will not connect to her wireless network. You personally checked to verify that the wireless worked properly before the user left your office. The user states she rebooted the computer several times but the problem still persists. Which of the following is the first step you should take to assist the user in resolving this issue?
Answer:
You can perform the following two steps
Explanation:
Have the user press the appropriate function key combination to enable the wireless radio and then attempt to connect to the wireless network (since by mistake he could have disabled it).Ask the user to turn on the laptop’s airplane mode and attempt to reconnect to the wireless network (this mode basically what it does is disable adapters and activate it will connect the Wi-Fi network).you need to deploy a new cloud-based windows intune deployment to manage mobile devices in your organization. drag and drop the deployment configuration tasks on the left into the correct order in which they should be completed on the right. not all tasks will be used.
step 1: sign up for an intune account
step 2: create intune user accounts
step 3: define intune policies
step 4: enroll mobile devices
step 5: link mobile devices to users.
Answer:
step 1: sign up for an intune account
step 2: create intune user accounts
step 3: define intune policies
step 4: enroll mobile devices
step 5: link mobile devices to users.
Explanation:
The Microsoft Windows intune is a Microsoft cloud-based service that provides a central cloud service for all subscribed and linked devices. It provides a sense of security of data resource and tracking of device activities.
A company subscribes to intune to allow the use of both cooperate and BYOD (bring your own device to work), to access data. First, the administrator sign up and create the intune account, then defined the intune security policies. Then it enrolls the individual devices and links them to their respective users.
Inputs to a quantitative model
a. are a trivial part of the problem solving process.
b. are uncertain for a stochastic model.
c. are uncontrollable for the decision variables.
d. must all be deterministic if the problem is to have a solution.
Answer:B. ARE UNCERTAIN FOR A STOCHASTIC MODEL.
Explanation:Stochastic model is a financial business model, often used by Business organisations to determine which financial decisions to make.
A stochastic model can also be described as a tool for evaluating the probability distributions of potential outcomes of certain events by giving room for random variation in one or more inputs per time. The random variation used in Stochastic model is usually relies on changes observed in historical data for a specific period of time using standard time-series techniques.
INPUT TO A QUANTITATIVE MODEL ARE UNCERTAIN FOR A STOCHASTIC MODEL.
Final answer:
In a quantitative model, inputs can be uncertain as in stochastic models, which is more reflective of real-world scenarios. Deterministic models require precise inputs to predict exact outcomes. The nature of inputs significantly influences the approach to interpreting and solving the model.
Explanation:
When considering inputs to a quantitative model, it's crucial to understand that not all inputs are deterministic; many models deal with uncertainties which is characteristic of stochastic models. Quantitative models in fields like business forecasting and statistics often approximate real-world phenomena and must take into account factors such as disturbances which are inputs that cannot be controlled. Therefore, each variable and how it's treated within the model greatly affects the approach and accuracy of the problem-solving process.
Deterministic models are used in cases where exact outcomes can be predicted from given inputs, such as the trajectory of a rocket or heat transfer calculations. These models rely on deterministic inputs for their precision and usefulness. Conversely, when dealing with stochastic models, inputs are uncertain, reflecting real-world unpredictability and the need for flexibility within the model.
Furthermore, input to these models does not have to be deterministic in order to solve a problem. Many models are designed to use 'placeholder' values that can be later specified by the user, allowing a model to be used in various scenarios with different input values.
Most of the international operations in a computer use hexadecimal numbering. True Or False
Final answer:
The statement is false; computers primarily use binary numbering for operations, with hexadecimal as a more human-friendly representation for particular applications like memory addressing or color coding.
Explanation:
The statement that most international operations in a computer use hexadecimal numbering is false. While hexadecimal is a number scheme that can be used to represent numbers in a more human-readable format than binary, computers ultimately operate using binary numbering. Hexadecimal is often used in computing for purposes such as memory addressing and color coding in web design because it's more compact and easier for humans to read than binary, but the computer's hardware and low-level software work directly with binary numbers.
Humans are more comfortable with decimal notation, while computers use binary notation due to the electronic states in computer chips being on or off. This binary system is the foundation of all computation, and even though computers can represent information in hexadecimal, they do so only for the convenience of programmers and users; the underlying operations and data processing are still conducted in binary.
Moreover, representations like IPv4 and IPv6 addresses do use numbers and letters to express the addresses in a format that's both compact and useful for humans. In particular, IPv6 addresses use hexadecimal notation to manage the vastly larger address space they offer compared to IPv4.
Therefore, while hexadecimal is a useful notation for certain aspects of computing, it is not accurate to say that most internal operations in computers use it. Instead, binary remains the basic language of computers.
A user sends an e-mail request asking for read-only access to files that are not considered sensitive. A Discretionary Access Control (DAC) methodology is in place. Which is the MOST suitable approach that the administrator should take?
A. Administrator should request data owner approval to the user access
B. Administrator should request manager approval for the user access
C. Administrator should directly grant the access to the non-sensitive files
D. Administrator should assess the user access need and either grant or deny the access
Answer:
A
Explanation:
Although the administrator has a level of access above that of a user, he cannot automatically approve due the presence of Discretionary Access Control (DAC). Hence, the administrator should request data owner approval to the user access.
Which of the following code is correct? I: print("Programming is fun") print("Python") print("Computer Science") II: print("Programming is fun") print("Python") print("Computer Science") III: print("Programming is fun") print("Python") print("Computer Science") IV: print("Programming is fun") print("Python") print("Computer Science")
Answer:
None of the options is correct.
Explanation:
One of the simplest statements that you can write in Python is a print statement, which causes a message to be displayed on the screen. For example, the following statement causes the message Python programming is fun! to be displayed:
print 'Python programming is fun!'
Notice that after the word print, the Python programming is fun! was written inside a set of single-quote marks. The quote marks are necessary, but they will not be displayed. They simply mark the beginning and the end of the text that we wish to display.
Here is an example of how you would type this print statement at the interpreter’s
prompt:
>>> print 'Python programming is fun!'
After typing the statement you press the Enter key and the Python interpreter executes the statement, as shown here:
>>> print 'Python programming is fun!'
Python programming is fun!
>>>
Thus, the correct way to write the codes in the question is:
print 'Programming is fun'
print 'Python'
print 'Computer Science'
Answer:
None
Explanation:
print 'Programming is fun'
print 'Python'
print 'Computer Science'