Attackers frequently use ACK scans to circumvent a firewall or other filtering tools. During a NULL scan, all packet flags are enabled. The most recent versions of Nessus Server and Client are compatible with Windows, Mac OS X, FreeBSD, and the vast majority of Linux variants.
<h3>What is ack scan ?</h3>
- ACK scans are used to identify hosts or ports that have been blocked or are resistant to other types of scanning. An attacker uses TCP ACK segments to learn about firewall or ACL configuration.
- Attackers probe our router or send unsolicited SYN, ACK, and FIN requests to specific UDP/TCP ports.
- TCP ACK Scan sends an ACK message to the target port to determine whether or not it is filtered.
- On unfiltered ports, a RST reply packet will be sent for both open and closed ports. Filtered ports will either generate no response or generate an ICMP reply packet with an unreachable destination.
- The TCP ACK scanning technique attempts to determine whether a port is filtered by using packets with the ACK flag set.
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Could it be archive posts? I'm not sure, but I believe it's archive posts.
Answer:
d. It is assumed that the search pool is ordered.
Explanation:
A binary search/logarithimic search/half interval search/binary chop refers to search algorithm in computer science that sorts data in array in key:value arrangements. In order to locate a value in binary search, the key to the value in a sorted array is located. A binary search is characterized by an ascending, descending order arrangement of the array.
Answer:
type of malware that is often disguised as legitimate software. Trojans can be employed by cyber-thieves and hackers trying to gain access to users' systems. Users are typically tricked by some form of social engineering into loading and executing Trojans on their systems.
Explanation its malware
<u>Virus outbreaks in an organization:</u>
In an organization end user who uses the computer or laptop or workstation is not aware of virus outbreaks. So As IT administrator of an organization she/he has aware of latest virus attack and rectification solution before outbreaks.
Common causes for this virus outbreaks problem is update virus definition or database. Update operating system patches on regular basis.
Installation appropriate anti-virus in each workstation or desktop or laptop and scheduling virus scanning and take necessary steps.
To address and troubleshoot disconnect workstation and desktop or laptop from LAN. Uninstalled unnecessary software, delete temp folder contents.
