a$)$ A web client sits behind a corporate NAT firewall rouner and has several open TCP connections to various web servers on the internet. Suddenly, the router looses power and reboots in $2$ seconds with no state $($i$.$e$.$ memory$)$ preserved from before the power failure. What happens to the web client's TCP connections? Explain in detail. Compare with a similar scenario where the firewall that does not do NAT.

b$)$ Why is UDP preferred as a transport layer protocol for interactive video compared to TCP$?$

c$)$ At a one time the parameters of a TCP connection have these values:

LastByteSent $=66352$

L$$stByteAcked $=58903$

The TCP sender process must send immediately a segment of $12345$ bytes. What is the minimum size of the AdvertisedWindow parameter for the transmission to proceed without delay?

Assume that MaxSendBuffer is $100$ KB long.

a$)$ A web client sits behind a corporate NAT firewall roufer and has several open TCP connections to various web servers on the internet. Suddenly, the router looses power and reboots in $2$ seconds with no state $($i$.$e$.$ memory$)$ preserved from before the power failure. What happens to the web client's TCP connections? Explain in detail. Compare with a similar scenario where the firewall that does not do NAT.

b$)$ Why is UDP preferred as a transport layer protocol for interactive video compared to TCP$?$

c$)$ At a one time the parameters of a TCP connection have these values:

LastByteSent $=66352$

LastByteAcked $=58903$

The TCP sender process must send immediately a segment of $12345$ bytes. What is the minimum size of the AdvertisedWindow parameter for the transmission to proceed without delay? Assume that MaxSendBuffer is $100$ KB long.