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Questions and Answers
The getservbyport() function retrieves the port number of a network service based on its name and protocol.
The getservbyport() function retrieves the port number of a network service based on its name and protocol.
False
The bind() function is used to disconnect a socket from a specific network address and port number.
The bind() function is used to disconnect a socket from a specific network address and port number.
False
The recvfrom() function is used to send data through a UDP socket.
The recvfrom() function is used to send data through a UDP socket.
False
A socket object represents only the port number.
A socket object represents only the port number.
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The getservbyname() function is used to retrieve the port number of a network service based on its name and protocol.
The getservbyname() function is used to retrieve the port number of a network service based on its name and protocol.
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A hostname is a numerical label assigned to a device connected to a computer network.
A hostname is a numerical label assigned to a device connected to a computer network.
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The gethostbyname() function is used to obtain the hostname associated with a given IP address.
The gethostbyname() function is used to obtain the hostname associated with a given IP address.
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A domain name is a numerical label assigned to each device connected to a computer network.
A domain name is a numerical label assigned to each device connected to a computer network.
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The getservbyname() function is used to retrieve information about a network service based on its IP address and protocol.
The getservbyname() function is used to retrieve information about a network service based on its IP address and protocol.
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The gethostbyaddr() function is used to obtain the IP address associated with a given hostname.
The gethostbyaddr() function is used to obtain the IP address associated with a given hostname.
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Study Notes
Network Programming using Python
- A hostname is a label assigned to a device connected to a computer network, making it easily identifiable and distinguishable from others on the network.
- A domain name is the human-readable version of an IP address, which is a numerical label assigned to each device connected to a computer network.
Socket Library Functions
-
gethostbyname()is a function that obtains the IP address associated with a given hostname, useful for converting domain names to IP addresses for network communication. -
gethostbyaddr(ip_address)performs a reverse DNS lookup to obtain the hostname associated with a given IP address. -
getservbyname()retrieves information about a network service based on its name and protocol, useful for obtaining the port number associated with a specific service name. -
getservbyport()is the inverse ofgetservbyname(), used to retrieve the name of a network service based on its port number and protocol.
Creating a Socket
- A socket object represents the hostname and port number, created using a constructor method.
- Binding a socket associates it with a specific network address and port number, allowing it to listen for incoming connections or specify the local endpoint for outgoing connections.
UDP Socket Functions
- The
recvfrom()function is used to receive data from a UDP socket, specifically designed for UDP sockets due to its connectionless protocol. - The syntax of the
recvfrom()function allows it to receive data from different source addresses.
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Description
This quiz covers the basics of networking programming using Python, including socket library functions and understanding hostnames.
