Which of the following is false with respect to UDP
Answer: a
Explanation: UDP is an unreliable, connectionless transport layer protocol.
Return value of the UDP port “Chargen” is
Answer: a
Explanation: Chargen with port number 19 returns string of characters.
Beyond IP, TCP provides additional services such as
Answer: d
Explanation: UDP is a simple protocol which provides demultiplexing and error checking.
The main advantage of UDP is
Answer: c
Explanation: UDP is an unreliable, connectionless transport layer protocol and uses minimum overload.
Port number used by Network Time Protocol(NTP) with UDP is
Answer: b
Explanation: Port number used by Network Time Protocol with UDP is 123.
what is the header size of UDP packet?
Answer: a
Explanation: The fixed size of the UDP packet header is 8 bytes.
The port number is “ephemeral port number”, if the source host is ……
Answer: d
Explanation: If the source host is the client, the port number in most cases will be ephemeral port number.
“Total length” field in UDP packet header is the length of
Answer: d
Explanation: Total length is the 16 bit field which contains the length of UDP header and the data.
Correct expression for UDP user datagram length is
Answer: a
Explanation: A user datagram is encapsulated in an IP datagram. There is a field in the IP datagram the defines the total length. There is another field in the IP datagram that defines the length of the header. So if we subtract the length of a UDP datagram that is encapsulated in an IP datagram, we get the length of UDP user datagram.
The field used to detect errors over the entire user datagram is
Answer: b
Explanation: Checksum field is used to detect errors over the entire user datagram.
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