Answer:
Physical layer is the first layer of OSI model. The detail about physical layer and its parts is given below in explanation section.
Explanation:
The physical layer is the lowest and first layer of the Open Systems Interconnection Model (OSI). The physical layer is used for the transmission of data in bit forms. For transmission of data between devices, it uses the transmission medium that is either wired or wireless.
In the wired cable the component of the psychical layer include cable and connectors that are implemented for carrying data from one place to another or simply to transmit data between two connected devices. The wireless transmission medium is used to transmit data in the form of electromagnetic signals for carrying data into a stream of bits. Over past advancements in networking technologies, rapid growth has been seen in wireless data transmission and Wi-Fi and Bluetooth communication are few names of it.
Components/Parts of Psychical Layer
In the physical layer, the hardware components used it in are the network interface cards, connectors and interfaces, intermediate devices, modems, and cables to facilitate the transmission of data between devices or from source to destination.
- The network interface card (NIC)
NIC is a component installed in the computer to connect it to any available devices over the network.
- Connectors and Interfaces
Connectors and interfaces are used to connect cables that are being used for transmission of data from one source to another. The decision to choose connectors and interfaces depends on the type of cable. Typical examples are RJ-45, RJ-11, V.35, HDMI, etc.
Cables are the physical components of the physical layer that carry optic or electromagnetic signals for transmission of data from source to destination in the network.
The intermediate devices are hubs and repeaters etc. The functions of these devices are to amplify or generate the signal at the intermediate point in a network.
Answer:
Set
Explanation:
A set is unique in Python. It does not allow duplicates
The PHP function that is executed is a connection to a database that cannot be made is the die() function.
An error is an undesirable programming outcome. The mistake is a subset of the error. Error management is a vital component of any website or programme.
Error handling is a mechanism for identifying errors that a programme makes and taking appropriate corrective action. This can be done by utilising die() method.
When a programming problem occurs, the software will halt further code execution and display the appropriate error message to the user. The die() function displays a message and terminates the running of the programme.
The connect() function in PHP is one that is used to establish a connection to a database.
The end() method in PHP is used to locate the final element of the specified array. The end() function updates an array's internal pointer to refer to the final element and returns that element's value.
The isset() function examines whether a variable is set, which implies that it has to be declared and is not NULL. If the variable is present and not NULL, this function will return true; otherwise, it will return false.
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Answer:
fraction = input("enter fraction x/y: ")
if len(fraction) == 3:
if fraction[1] == "/":
try:
num = int(fraction[0])
den = int(fraction[2])
if num < den:
print(f"{num}/{den} is a proper fraction")
else:
if num% den == 0
print(f"{num}/{den} is an improper fraction and can be reduced to {num/den}")
else:
print(f"{num}/{den} is an improper fraction and can be reduced to {num//den} + {num - (den * (num//den))}/{den}")
except ValueError:
print("numerator and denominator must be integer numbers")
Explanation:
The try and except statement of the python program is used to catch value error of the input fraction of values that are not number digits. The program converts the numerator and denominator string values to integers and checks for the larger value of both.
The program prints the fraction as a proper fraction if the numerator is lesser and improper if not.
