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Focus Questions/Activities: 1. ARP a. Capture and ARP packet (use the arp_resolution.pcap file if you cannot do it directly) b. Inspect the packet and see if you can fill in all the fields in the table in Figure 6-2 on page 88 c. Work through the ARP Request and Response sections on pages 88/89.
2. IP a. Capture an IP packet (use a precaptured one from lotsofweb.pcap if you need to) b. Fill in the information in Figure 6-9. c. Use ip_frag_source.pcap to work through the fragmentation section on page 95.
3. TCP a. Capture a TCP packet b. Fill in the information in table 6-16 c. Inspect the the ports associated with the packet, indicating what application is associated with that port
4. UDP a. Capture a UDP packet (you might have to get one from udp_dnsrequest.pcap) b. Fill in the information in table 6-27. (Reflect on why this information is so much less than for TCP) c. Inspect the the ports associated with the packet, indicating what application is associated with that port
5. DHCP (Dynamic Host Configuration Protocol) a. Work through DORA process on pages 116/119. b. Inspect the DHCP renewal and In-lease renewal process (use the dhcp_nolease_renewal.pcap, dhcp_inlease_renewal.pcap) c. What are the important ports and what is transport layer protocol used by DHCP? d. When is (in-lease renewal process) performed?
6. DNS (Domain Name System) a. Inspect the DNS functions query/response (use a precaptured files from UTS online dns_query_response.pcap, dns_recursivequery_client.pcap, dns_recursivequery_server.pcap and dns_axfr.pcap if you need to) b. What is the important port used by DNS? And what are the transport layer protocols used by DNS? c. Reflect of the differences between DNS query/Recursion and DNS zone Transfers AXFR/IXFR.
7. HTTP (Hypertext Transfer Protocol) a. Capture a HTTP packets and inspect the request methods of HTTP (use the http_google.pcap and http_post.pcap if you need to) b. Wireshark shows TCP segments rather than HTTP packets, why? And what is the server port? (150 words) c. Reflect the meaning of the response code associated with the HTTP such as 200, 302
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The process of resolution that TCP/IP networking uses to resolve an IP address into a MAC address is called ADDRESS RESOLUTION PROTOCOL. The process uses only two packets: ARP REQUEST & ARP RESPONSE.
The header section for both ARP Request & ARP Response is similar. The first difference is that the OPCODE for Request is 1 whereas the OPCODE for Reply/Response is 2. The second difference is that the Sender MAC & Protocol Address in the Request, become the Target MAC & Protocol Address in the Response…
When a certain devices IP address changes, the IP to MAC mappings that hosts on the network becomes invalid. To avoid communication errors, gratuitous packets are transmitted on the network. These packets force the device that receives it to update its cache with the new IP to MAC address mapping….
IP is a protocol at layer 3 of the OSI model responsible for internetwork communication. IPV4 (version 4 of the INTERNET PROTOCOL) is responsible for carrying data between devices regardless of where the communication endpoints are located.
Packet Fragmentation is feature of IP that permits reliable delivery of data across varying types of network by splitting a data stream into smaller segments. The fragmentation of a packet is based on the MAXIMUM TRANSMISSION UNIT (MTU) size….
Wireshark – Malware traffic Analysis | Practical | Interview questions | CYBERSEC LIVE
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Wireshark is a network protocol analyzer that can be used to troubleshoot network issues and monitor traffic. When interviewing for a position that will involve using Wireshark, it is important to be prepared to answer questions about your experience and knowledge of the program. This article discusses some of the most common Wireshark interview questions and provides tips on how to answer them.
TKIP and AES are two of the most common encryption methods used on WiFi networks. TKIP is an older method that is not as secure as AES, so if you are setting up a new WiFi network, you should use AES. However, if you have an older device that does not support AES, you can still use TKIP.
The “stats” menu in Wireshark provides a variety of statistical information about the current capture file. This can include things like the number of packets captured, the size of the capture file, the average packet size, and more. This information can be helpful in understanding the data that has been captured, and can also be used to troubleshoot problems with the capture file.
A cookie is a small piece of data that is sent from a website and stored on the user’s computer. Cookies are used to remember information about the user, such as their preferences or login information. When the user visits the website again, the website will read the cookie and use the information to customize the user’s experience.
There are a few reasons why monitoring network traffic is important on enterprise systems. First, it can help identify potential security threats. If there is suspicious activity going on, it can be caught and dealt with before it causes any damage. Second, it can help with troubleshooting. If there is a problem with the network, seeing the traffic can help identify where the issue is. Finally, it can be used for performance monitoring. By seeing how the network is being used, you can make sure that it is running optimally.
Where can I get help?
Community support is available on the Q&A site and on the wireshark-users mailing list. Subscription information and archives for all of Wireshark’s mailing lists can be found at https://www.wireshark.org/mailman/listinfo.
During an interview I was asked to answer this question the best I could, I know I didnt do well, lets see what the right ones are – “A PC is booted for the first time with a static IP on a LAN segment with no other hosts, the user types in http://www.google.com in the browser, if wireshark was running on that link, what all packets would show up in the capture?”
FAQ
What is Wireshark used to analyze?
- Network administrators use it to troubleshoot network problems.
- Network security engineers use it to examine security problems.
- QA engineers use it to verify network applications.
- Developers use it to debug protocol implementations.
What is Wireshark and its uses?
How does Wireshark capture data?
