Wireshark Lab Ip V8.1 Solution New! Online

Wireshark Lab: IP v8.1 – Complete Solution & Step-by-Step Analysis Introduction The Internet Protocol (IP) is the backbone of the internet. It provides the addressing and routing mechanism that allows data to travel from a source to a destination across multiple networks. The "Wireshark Lab: IP" (Version 8.1) is a hands-on exercise designed to help students and networking professionals examine the structure of IP datagrams, analyze fragmentation, and understand the Time-to-Live (TTL) field in action. This article provides a complete walkthrough and solution for the Wireshark IP v8.1 lab. We will cover packet capture, filtering, fragmentation analysis, and answer all the typical questions posed in the lab.

Note: This guide assumes you have Wireshark installed and have basic familiarity with its interface. The lab typically uses ping and traceroute (or tracert on Windows) to generate traffic.

Part 1: Lab Setup & Capturing an IP Datagram Objective Capture a simple ping request and reply to examine the IPv4 header fields. Procedure

Start Wireshark and begin capturing on your active network interface (Ethernet or Wi-Fi). Open a command prompt (or terminal). Use ping to send a single ICMP Echo Request to a remote server. For example: ping -n 1 google.com Wireshark Lab Ip V8.1 Solution

(On Linux/macOS: ping -c 1 google.com ) Stop the Wireshark capture after the ping completes. Apply a display filter: icmp to see only the ping request and reply.

Solution: Identifying the IP Datagram Select the first ICMP Echo Request packet. In the packet details pane, expand the Internet Protocol Version 4 header. Expected fields you will see:

Version: 4 (IPv4) Header Length: 20 bytes (or 5 in 32-bit words, if no options) Differentiated Services Field: 0x00 (usually) Total Length: Varies (e.g., 60 bytes for a typical ping) Identification: A unique hexadecimal number (e.g., 0x1234) Flags: 0x00 (Don’t Fragment may be 0 or 1) Fragment Offset: 0 Time to Live (TTL): 128 (Windows default), 64 (Linux/macOS default), or 255 Protocol: 1 (ICMP) Header Checksum: Calculated by the sender Source IP Address: Your machine’s IP Destination IP Address: google.com’s IP Wireshark Lab: IP v8

Part 2: Detailed Analysis of the IPv4 Header The lab typically asks specific questions about these fields. Below are the verified answers based on a standard capture. Question 1: What is the IP address of your host? What is the destination IP address? Solution:

Your host: Find the Source field in the IP header of the Echo Request packet. Destination: The Destination field in the same packet.

Example: Source: 192.168.1.100 (private) or your public IP if not NATed. Destination: 142.250.190.46 (Google). Question 2: How many bytes are in the IP header? How many bytes are in the payload? Solution: This article provides a complete walkthrough and solution

Header length: Look at the Header Length field. Multiply the value (e.g., 5) by 4 → 20 bytes . Total length: e.g., 60 bytes (from the Total Length field). Payload: Total Length – Header Length = 60 – 20 = 40 bytes . These 40 bytes contain the ICMP header (8 bytes) and the ping payload (32 bytes typically).

Question 3: What is the value in the Identification field? Solution: Check the Identification field in the IP header of the request. It will be a hexadecimal number like 0x2a3f (decimal 10815). This number is incremented for each packet sent from the host. Question 4: What is the TTL value? What does this imply? Solution: