You are reviewing packets captured by a co$-$worker. The traffic is from a Linux server that hosts private customer data, and your job is to analyze the content for potential security risks. The $.$pcap file appears to be a bit small for what you wanted. $($It contains traffic to and from the target system during a given time period.$)$ Some of that traffic is shown below. You suspect that only SSH traffic is represented in this capture, which was done with tcpdump. What command do you think your co$-$worker used to capture only SSH traffic?

Question $82$ options:

tcpdump $-$p $21$

tcpdump $-$i eth$0$

tcpdump port $22$

tcpdump port $21$