Advanced Analysis
How can you use Wireshark to identify possible network attacks?
By looking for unusual patterns, like excessive retransmissions, unfamiliar protocols, or traffic to known malicious IPs.
How can Wireshark help identify network latency issues?
By analyzing time stamps and identifying delays in packet transmission.
What is the purpose of color coding in Wireshark?
To visually distinguish different types of traffic and quickly identify potential issues.
How can you save a filtered packet capture for later analysis?
By applying the desired filter, then going to "File" -> "Export Specified Packets"
Explain how Wireshark can be used to analyze VoIP calls.
By capturing VoIP traffic and analyzing SIP/RTP protocols for call setup and media flow.
What is a sequence number in TCP, and why is it important?
It helps in assembling packets in the correct order, crucial for ensuring data integrity and flow control.
What patterns might indicate packet loss in Wireshark?
Multiple retransmissions and out-of-order packets.
How do you create and apply a custom color rule in Wireshark?
By going to "View" -> "Coloring Rules" and defining new rules based on your criteria.
What is the difference between "tcp.analysis.flags" and "tcp.flags.reset" in Wireshark?
"tcp.analysis.flags" is used for specific TCP flag analysis while "tcp.flags.reset" specifically filters for RST flags
How can you use Wireshark to detect malware communication?
By monitoring for command and control (C&C) traffic, unusual outbound connections, or known malicious IP addresses.
How can Wireshark help in identifying DNS spoofing attacks?
By identifying unexpected or unauthorized DNS responses.
How can you use Wireshark to troubleshoot DHCP issues?
By capturing and analyzing DHCP discovery, offer, request, and acknowledgment packets.
What is a "Profile" in Wireshark, and how can it be used?
A set of saved preferences, filters, and layout configurations tailored to specific types of analysis.
How can Wireshark's graphing tools be used to analyze network performance?
Through the "Statistics" -> "IO Graphs" option, visualizing different metrics over time.
In Wireshark, how can you tell if a packet is part of a fragmented IP datagram?
By looking for the "More Fragments" flag in the IP header or the presence of fragmented packet indicators.
What are some indicators of ARP spoofing in Wireshark?
Seeing unexpected ARP responses or multiple MAC addresses claiming the same IP address.
What does a retransmission in Wireshark signify?
It often indicates network congestion, leading to packets being dropped and needing retransmission.
How can the "Follow TCP Stream" feature be useful?
It allows the analyst to view the entire conversation between two endpoints
What does the term "packet sniffing" mean in the context of Wireshark?
Monitoring and capturing live network packet data for analysis.
What is the significance of the "Time to live" field in IP packets?
It indicates the maximum number of hops (routers passed through) that the packet can travel before being discarded.
How can you identify SSL/TLS versions being used in encrypted communications?
By inspecting the SSL/TLS handshake process, including the "Client Hello" and "Server Hello" packets.
How can you filter for ICMP messages in Wireshark?
Using the filter "icmp".
What does the "Expert Information" window in Wireshark display?
It consolidates warnings and errors identified during the analysis, highlighting potential issues.
How does Wireshark handle VLAN tagged packets?
It displays them with an 802.1Q header indicating the VLAN ID.
How can Wireshark assist in analyzing the performance of a wireless network?
By analyzing signal strength, retransmissions, and Wi-Fi-specific protocols like 802.11 management frames.