Transport Layer Protocol

Question 1
Which one of the following uses UDP as the transport protocol?
A
HTTP
B
Telnet
C
DNS
D
SMTP
       Computer Networks        Transport Layer Protocol       Gate-2007
Question 1 Explanation: 
DNS uses the UDP at the transport layer with port number 53 for name resolution.
HTTP, Telnet and SMTP uses TCP.
Question 2
Which of the following functionalities must be implemented by a transport protocol over and above the network protocol?  
A
Recovery from packet losses
B
Detection of duplicate packets
C
Packet delivery in the correct order
D
End to end connectivity
       Computer Networks        Transport Layer Protocol       Gate-2003
Question 2 Explanation: 
End to end connectivity is the required functionality provided by Transport protocol.
There are 2 questions to complete.