Choose ALL the correct answers.

Note that incorrect answers are penalised with $-10\%.$

Question $12$Answer

a$.$

UDP uses the listening or welcoming socket to establish a connection between sender and receiver

b$.$

A TCP $3-$way handshake is what triggers TCP fast$-$retransmit

c$.$

A video streaming application with $5\mathrm{.}2$ million users in $3\mathrm{.}2$ continents that relies on a CDN will use the MX type DNS record for content distribution

d$.$

In TCP$,$ If the sender receives $2$ additional ACKs for same data, the sender will resend the unACKed segment with the smallest sequence number without waiting for the timeout

e$.$

The TCP$-3$ way handshake will never take place in the listening socket

f$.$

In TCP$,$ the listening socket will receive a minimum number of $92$ application level messages

g$.$

All other options are correct

h$.$

Because DNS is a critical element in the Internet, it uses TCP to ensure reliability

i$.$

TCP uses $3$ sockets for the $3-$way handshake

j$.$

UDP is commonly used for loss tolerant transmissions such as audio$/$video streaming

k$.$

A server needs to have a socket to welcome the requests for TCP connections

l$.$

If the network layer delivers data faster than the application layer reads data from the socket buffers, TCP will do nothing because this is a network layer problem