Using Wireshark to capture TCP packets Download and install Wireshark in your own computer.

Use any browser to access any website, and launch Wireshark to finish the following, Please access any web site so you that you can capture a TCP packet. Please expand all the fields of TCP header of packet captured. Please answer the following questions based on your TCP packet screenshot

1. What is the length of the packet?

2. What is the relation between Window, Window size scaling factor, and Calculated Window Size?

3.What are the Reassembled TCP segments including segment number and size respectively, if they exist?

4. Which flags are set up in the captured packet? Explain what the flags mean.

Transmission Control Protocol, Src Port: 62358, Dst Port: 443, Seq: 1, Ack: 1, Len: 214 Source Port: 62358 Destination Port: 443 [Stream index: 23] [Conversation completeness: Complete, WITH_DATA (63)] [TCP Segment Len: 214] Sequence Number: 1 (relative sequence number) Sequence Number (raw): 1226777881 [Next Sequence Number: 215 (relative sequence number)] Acknowledgment Number: 1 (relative ack number) Acknowledgment number (raw): 1396085214 0101.= Header Length: 20 bytes (5) Flags: 0x018 (PSH, ACK) 000. ....... = Reserved: Not set 0= Accurate ECN: Not set 0....= Congestion Window Reduced: Not set .0.=ECNEcho: Not set ..= Urgent: Not set 1= Acknowledgment: Set .1= Push: Set ....0.= Reset: Not set ....= Syn: Not set .= Fin: Not set [TCP Flags: ..AP] Window: 517 [Calculated window size: 132352] [Window size scaling factor: 256] Checksum: 0x9f98 [unverified] [Checksum Status: Unverified] Urgent Pointer: 0 [Timestamps] [Time since first frame in this TCP stream: 0.102432000 seconds] [Time since previous frame in this TCP stream: 0.000819000 seconds] [SEQ/ACK analysis] [iRTT: 0.101613000 seconds] [Bytes in flight: 214] [Bytes sent since last PSH flag: 214] TCP payload (214 bytes)