$1.$ Start Wireshark and capture packets. Use NTPClient.java and NTPMessage.java to connect to pool.ntp$.$org. Stop Wireshark and save the capture in a pcap file. Save the answers to the questions below in a file. Use the NTP reply in your Wireshark capture to answer questions below.

$1\mathrm{.}1$ Is this reply from a primary NTP server? Explain your answer by using relevant fields in the reply.

$1\mathrm{.}2$ At what time was the NTP response received by the client? Is this the destination timestamp or the receive timestamp? Explain your answer.

$2.$ Write a Java UDP socket program with a client NTPClient.java and a local NTP server NTPServer.java that communicate via localhost and do the following.

NTP server:

$2\mathrm{.}1$ The main server thread listens in a loop on port $1000$ for requests from NTP clients

$2\mathrm{.}2$ When a NTP request arrives, it prints $$starting client thread$,$ starts a new thread, generates a random integer d between $1$ and $10000,$ prints $$d$=$ followed by the value of d$,$ delays for d milliseconds, and sends the NTP reply to the client

$2\mathrm{.}3$ Prints the message $$stopping client thread$$ and stops the client thread

NTP client:

$2\mathrm{.}4$ Prints the message $$sending request$$ and sends an NTP request to the local NTP server

$2\mathrm{.}5$ Prints the NTP reply received from the local NTP server.