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k0ka [10]
3 years ago
8

The physical layer of the OSI model is not foundational to any of the other layers. True or False

Computers and Technology
1 answer:
galina1969 [7]3 years ago
5 0

Answer:

False.

Explanation:

OSI model stands for Open Systems Interconnection. The seven layers of OSI model architecture starts from the Hardware Layers (Layers in Hardware Systems) to Software Layers (Layers in Software Systems) and includes the following;

1. Physical Layer

2. Data link Layer

3. Network Layer

4. Transport Layer

5. Session Layer

6. Presentation Layer

7. Application Layer

Each layer has its unique functionality which is responsible for the proper functioning of the communication services.

The physical layer of the OSI model is the first layer of the OSI model and it is foundational to any of the other layers because it determines the means of transmitting (sending) raw bits from one network node to another and the electrical specification of network equipments.

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Write a Python function called readlinesmton that accepts the name of the file (i.e. filename), starting line number (i.e. m) an
KatRina [158]

Answer:

Following are the code to the given question:

def readlinesmton(filename, m ,n):#defining a method that holds three parameters

   f=open(filename, 'r')#defining f variable that holds open method

   l=f.readlines()#defining a variable l that readers input file

   e=len(l)#defining e variable lengths of the file  

   s=m#defining s variable that holds parameter value

   if(m<1):#Using if block that checks m is less than 1

       s=1#use s variable that holds a value that is 1

   if(n < e):#defining n variable that checks n less than e

       e=n #using e that holds n value

   for i in range(s-1, e, 1):#defining for loop that calculates lines  

       print(l[i])#prints lines

readlinesmton("input.txt", -1, 70)#Calling a method

Output:

Please find the ouput in the attached file.

Explanation:

In this code, a method "readlinesmton" is declared that takes three-parameter and inside the method, it uses the open method to open the file, read method to read the file, and len to calculate the length of the file and use the conditional statement to check the file inputs and use the loop to prints its values.    

5 0
3 years ago
A security administrator wants to empty the DNS cache after a suspected attack that may have corrupted the DNS server. The serve
mario62 [17]

Answer: (D) IPCONFIG

Explanation:

The IPCONFIG is the type of tool that can be use to flush or refresh the dynamic host configuration (DNS) cache on the window client. The IPCONFIG display various types of parameters such as subnet mask, IP address and the default gateway.

 In the computing, the IPCONFIG is stand for the internet protocol configuration and it is one of the operating system applications which basically display all Transmission control protocol/ Internet protocol (TCP/IP) network configurations.

Therefore,Option (D) is correct.

 

3 0
3 years ago
Write a recursive function that calculates if two binary trees are similar?
ahrayia [7]

Answer:

bool identicaltrees(Node* root1,Node* root2)//function of type boolean true if idenctical false if not.

{

   if(root1==NULL&&root2==NULL)//both trees are null means identical.

   return true;

   if(roo1 && root2)

   {

       if(root1->data==root2->data)//condition for recursive call..

       {

           return (identicaltrees(root1->left,root2->right)&&identicaltrees(root1->right&&root2->right);

       }

   }

   else

   return false;

}

Explanation:

In this function it of type boolean returns true if both the trees are identical return false if not.First we are checking root node of both the trees if both are null then they are identical returning true.

If both root nodes are not null then checking their data.If data is same then recursively traversing on both trees and checking both trees.

else returning false.

5 0
3 years ago
You need to design a data storage scheme for Hayseed Heaven library data system. There are several hundred thousand large data r
Alekssandra [29.7K]

Answer:

Make use of hash tables

Explanation:

The appropriate thing to use for this should be a hash table.

A Hash Table can be described as a data structure which stores data in an associative manner. In a hash table, data is stored in an array format, where each data value has its own unique index value. Access of data becomes very fast if we know the index of the desired data. So we can perform Hashing on ISBN Number since its unique and based on the Hash Function w ecan store the Information record.

There is no requirement for printing the file in order - HashTables dont store the data in order of insertions, so no problems with that

It becomes a data structure in which insertion and search operations are very fast irrespective of the size of the data. So Querying books details can be fast and searching will take less time.

It can also be pointed out that it wont be too expensive for Hardware implemtation as HashTables stores data based on Hash Functions and memory consumption is also optimal which reduces memory wastages.

7 0
3 years ago
3. Which icon image is greater in file size? (Show your working) [2]
kipiarov [429]

Answer:

I would go with b. A 16 colour icon with dimensions of 100 x 100 pixels.

Explanation:

Even though the first colour icon has more colours, the second has double the pizels in the both the height and width.

Hope this answer helps!

5 0
3 years ago
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