John, a malicious hacker, forces a router to stop forwarding packets by flooding it with many open connections simultaneously so that all hosts behind it are effectively disabled. Which of the following attacks is John performing?
Adam works as a professional Computer Hacking Forensic Investigator, a project has been assigned to him to investigate and examine files present on suspect's computer. Adam uses a tool with the help of which he can examine recovered deleted files, fragmented files, and other corrupted data. He can also examine the data, which was captured from the network, and access the physical RAM, and any processes running in virtual memory with the help of this tool. Which of the following tools is Adam using?
You work as a Network Administrator for Tech Perfect Inc. The company has a TCP/IP-based network.
A firewall has been configured on the network. You configure a filter on the router. You verify that SMTP operations have stopped after the recent configuration. Which of the following ports will you have to open on the router to resolve the issue?
Which of the following ports cannot be used to access the router from a computer?