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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Answer:
Tasha should gather ideas from her team to build the network.
Explanation:
Network allows the user to connect on one platform. Tasha has decided to create a network which will enable large number users to be connected on single network and every employee will be able to perform its normal operations remotely.
Answer:
Explanation:
price = eval(input("price of item: "))
quantity = eval(input("quantity of item: "))
sales_tax = 0.08 # 8% sales tax
total_cost = price*quantity
total_cost_with_tax = total_cost + total_cost*sales_tax
print("total cost: "+str(total_cost))
print("total cost + 8% sales tax: "+str(total_cost_with_tax))
Answer:
It is supported by many different experiments.
Explanation:
Scientific theory is based on different experiments and tested in different situations and environment will all aspects. If the experiment finds true then observations will become theory. It can be changed in future if it does not meet the newly proposed conditions. But It does not means that, every theory can be changed.