World of Computer Networking Your CCNA start - Capturing Some Data Using Wireshark

The video tutorial covers the installation and setup of Wireshark, a network protocol analyzer. It guides users through capturing and analyzing network packets, explaining how to select the correct network interface and apply filters. The tutorial also delves into the structure of packets, including sections like TCP, IP, and Ethernet, and highlights the importance of protocols in network communication. The session concludes with a brief overview of TCP/IP and OSI models, setting the stage for further exploration in the course.

What is the first step to install Wireshark on macOS?

• Use the terminal to clone the Wireshark repository.

• Navigate to wireshark.org and download the installer.

• Purchase a license from the Wireshark website.

• Open the App Store and search for Wireshark.

Before starting packet capture in Wireshark, what must you ensure?

• Wireshark is running in safe mode.

• All other applications are closed.

• The computer is connected to a VPN.

• The correct network interface is selected.

Which protocol is NOT mentioned as being visible in the initial packet capture?

• DNS

• IGMP

• HTTP

• RDP

What information can be found in the TCP section of a packet?

• MAC addresses

• Sequence numbers

• Encryption keys

• Domain names

What does the Ethernet 2 section in a packet display?

• Packet length

• Protocol type

• Source and destination MAC addresses

• Source and destination IP addresses

Why is it important for devices to follow strict protocols in network communication?

• To allow for wireless communication.

• To increase the speed of data transmission.

• To prevent data from being discarded by routers or switches.

• To ensure data is encrypted.

What happens if a packet is sent without an Ethernet or IP header?

• It is sent back to the sender.

• It is encrypted automatically.

• It is stored in a buffer.

• It is discarded by the router or switch.