Hackers: Transmission Control Protocol and Protocol Capture Essay

Protocol capture tools and protocol analyzers are important tools for an information systems security professional. These utilities can be used to troubleshoot issues on the network. They can verify adherence to corporate policies, such as whether or not clear text privacy data is being sent on the network. They can be used to test security countermeasures and firewall deployments and are needed to perform audits, security assessments, network baseline definitions, and identification of rogue IP devices.

First, let’s talk about Wireshark, it is the most common network packet analyzer used worldwide, perhaps one of the best open source (free) packet analyzers today. It lets you capture and interactively browse the traffic running on a computer network, helping you analyze and manage the traffic in your network. Like a measuring device used to examine what is going on in your network cable, like a voltmeter used by an electrician to examine what is going on inside an electric cable. Therefore, gives you the tools to do in depth network analysis, it will try to capture network packets and display them as detailed as possible for analysis. Furthermore, used for troubleshooting network problems, examine security problems, debug protocol

| Paste your answers to questions 1 through 16 in the document. Be sure to show your work.Perform the required problems.In your own words, summarize what you have learned concerning network commands available within the Windows operating system.

Task 2: Step 2, Generate and view network traffic, Action f. Paste the screenshot of the Ping command output of IP address 192.168.1.200. (2.5 points)

* Run a Flow Analysis to update the topology. Open the Visual CLI on the ISP router and ping all of the Servers and Host PCs including the Attack PC Use the IP addresses indicated on the network topology page. Select the commands you entered in the Virtual CLI using the mouse and click on the Copy button. Use <Ctrl>V to paste the commands and output results into your Lab Document.

TCP SYN Flood : A SYN flood attack works by not responding to the server with the expected ACK code.

// - FTP/TCP flow from n0 to n3, starting at time 1.2 to time 1.35 sec.

135.46.52.2. In binary this is 10000111.00101110.00110100.00000010. Again, we are looking at one of the Interfaces, so we take the 22 MSB’s, which

Finally, gathering all this information would enable the network administrator adjust the IDS to attacks specific to the network.

Network protocol communications, network connections established by host computer, network routing information, information about computers

Free software is free, users can change code, and source code is available to anyone.

Despite its impact ping sweeps and port scans are best understood as a huge security threat on today's company's network system.

This shows that there were 384 DNS datagrams sent in a very short time. Looking at capinfos, shows that the packet capture only lasted 22 seconds and it started on November 27 2010 at 23:39:45 (figure 2).

Question 3: Subnet Mask is 255.255.255.224, 199.88.1.0/27 first four: 199.88.1.32, 199.88.1.64, 199.88.1.96, 199.88.1.128----------Subnet Mask is 255.255.255.240 199.88.1.0/28 first four: 199.88.1.16, 199.88.1.32, 199.88.1.48, 199.88.1.64

Write the main network address if your network is sub netted without having to write the subnets i.e. if you some subnets connected to the router(172.32.0.0/24, 172.32.1.0/24, and 172.32.2.0/