The transport layer protocols used for real time multimedia, file transfer, DNS and email, respectively are
TCP, UDP, UDP and TCP
UDP, TCP, TCP and UDP
UDP, TCP, UDP and TCP
TCP, UDP, TCP and UDP
DNS runs over UDP protocol within port no-53.
Email needs, SMTP protocol which runs over TCP protocol within port no –25.
On a TCP connection, current congestion window size is Congestion Window=4 KB. The window size advertised by the receiver is Advertise Window=6 KB. The last byte sent by the sender is LastByteSent=10240 and the last byte acknowledged by the receiver is LastByteAcked=8192. The current window size at the sender is
= min (4KB, 6KB)