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kobusy [5.1K]
2 years ago
12

Dial-up connections can be made over a(n) ____ line or phone line. isdn dsl ipx tcp/ip

Computers and Technology
1 answer:
Mrac [35]2 years ago
8 0
<span>Dial-up connections can be made over an ISDN line or phone line.
isdn
dsl
ipx
tcp/ip</span>
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What is the difference between a switch and a hub?
marta [7]

Explanation:

A hub is used to send the message from one port to other ports.It does not know the specific address of the destination where the message needs to send.it works on Physical layer of the OSI model(layer 1).

A switch can handle data and it knows the specific address of the destination.A switch works on the data link Layer of the OSI model(layer 2).

8 0
2 years ago
Computers and Technology:
Monica [59]

Answer:

The algorithm:

Input days

sum = 0

for i = 1 to days

   input text

   sum = sum + text

end for

average = sum/days

print average

The program in pascal:

var days, sum, text, i:integer;

var average : real;

Begin

    write ('Days: '); readln(days);

    sum:=0;

    for i := 1 to days do begin

         write ('Text: ');  readln(text);  

         sum:=sum+text;

    end;

    average := (sum/days);

    writeln ('The average text is' , average);

End.

Explanation:

This declares all variables

var days, sum, text, i:integer;

var average : real;

This begins the program

Begin

This gets the number of days from the user

    write ('Days: '); readln(days);

Initialize sum to 0

    sum:=0;

This iterates through the days

    for i := 1 to days do begin

This gets the text for each day

         write ('Text: ');   readln(text);  

This sums up the texts

         sum:=sum+text;

End loop

    end;

Calculate average

    average := (sum/days);

Print average

    writeln ('The average text is' , average);

End program

End.

3 0
2 years ago
A network administrator has been given a network of 172.16.85.0/21 and wants to know the usable range of IP addresses on that su
viktelen [127]

Answer:

The correct answer to the following question will be option C.

172.16.80.1-172.16.87.254

Explanation:

IP Address: IP Address stands for Internet Protocol Address, a unique numerical label allotted to every computer network that are connected to the network of the computer and communicate through the internet protocol.

  • An IP address can be separated by periods and having four numbers that are called Octet. Range of IP address can be from 0 to 255.
  • We have to keep the first 21 bits and start setting all from the 22nd bit on to 0 (zero).
  • To get the suitable and the correct range of the address, we add and subtract 1 from the given broadcast address i.e.,172.16.85.0/21.

So, option C is the right answer and no other option is usable according to the given explanation and the address given by the administrator.

3 0
3 years ago
Modify the WordCount program so it outputs the wordcount for each distinct word in each file. So the output of this DocWordCount
stepladder [879]

Answer and Explanation:

package PackageDemo;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.fs.Path;

import org.apache.hadoop.io.IntWritable;

import org.apache.hadoop.io.LongWritable;

import org.apache.hadoop.io.Text;

import org.apache.hadoop.mapreduce.Job;

import org.apache.hadoop.mapreduce.Mapper;

import org.apache.hadoop.mapreduce.Reducer;

import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;

import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

import org.apache.hadoop.util.GenericOptionsParser;

public class WordCount {

public static void main(String [] args) throws Exception

{

Configuration c=new Configuration();

String[] files=new GenericOptionsParser(c,args).getRemainingArgs();

Path input=new Path(files[0]);

Path output=new Path(files[1]);

Job j=new Job(c,"wordcount");

j.setJarByClass(WordCount.class);

j.setMapperClass(MapForWordCount.class);

j.setReducerClass(ReduceForWordCount.class);

j.setOutputKeyClass(Text.class);

j.setOutputValueClass(IntWritable.class);

FileInputFormat.addInputPath(j, input);

FileOutputFormat.setOutputPath(j, output);

System.exit(j.waitForCompletion(true)?0:1);

}

public static class MapForWordCount extends Mapper<LongWritable, Text, Text, IntWritable>{

public void map(LongWritable key, Text value, Context con) throws IOException, InterruptedException

{

String line = value.toString();

String[] words=line.split(",");

for(String word: words )

{

Text outputKey = new Text(word.toUpperCase().trim());

IntWritable outputValue = new IntWritable(1);

con.write(outputKey, outputValue);

}

}

}

public static class ReduceForWordCount extends Reducer<Text, IntWritable, Text, IntWritable>

{

public void reduce(Text word, Iterable<IntWritable> values, Context con) throws IOException, InterruptedException

{

int sum = 0;

for(IntWritable value : values)

{

sum += value.get();

}

con.write(word, new IntWritable(sum));

}

}

}

8 0
3 years ago
Computer security experts devote their time and energy to the protection of sensitive data and the prevention of an outside atta
Alik [6]

Answer:

Information security policy are used for the prevention of intruders hacking a network when an organization start getting IT related attacks.

Explanation:

Information security policy are used for the prevention of intruders hacking a network when an organization start getting IT related attacks.

An information security policy are set of rules/policies designed to guide employees for the protection of the security of company information and IT systems. The reasons for these policies are:

  1. It defines what is required from organization’s employees for the security of the IT systems
  2. Information security policies provide a means to secure the organization against external and internal threats
  3. Information security policies are a mechanism to for ensuring an organization’s legal and ethical responsibilities
  4. Information security policies are created to hold each employee responsible with regard to information security
4 0
3 years ago
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