TCPDump is used by Wireshark to capture packets while Wireshark own function is: a. to provide a graphical user interface (GUI) and several capture filters.
b. to act as an intrusion prevention system (IPS) by stopping packets from a black-listed website or packets with payloads of viruses.
c. to defend the network against TCP SYN Flooding attacks by filtering out unnecessary TCP packets.
d. yet to be defined.

a. to provide a graphical user interface (GUI) and several capture filters

Explanation:

TcPDump is a command line tool used to capture packets. TcPDump is used to filter packets after a capture has been done. To control network interfaces, TcPDump need to be assigned root privileges. Data is represented in form of text

Wireshark provide a graphical user interface (GUI) and several capture filters. It is a graphical tool used in packet capture analysis. Data is represented in wireshark as text in boxes.

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