For Andrea to format the legend on her chart, she needs to click on the chart to select it. The Chart Tools option appears when a chart is selected. Andrea can build charts easily and successfully using the Chart Tool in Microsoft Excel or any other Spreadsheet programme. Let us assume that Andrea is using Microsoft Excel to create her chart. When she opens Excel and looks at the ribbon band on top of the new spreadsheet, there is an option to create charts. Using this option, she can create as many charts as she needs to
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:
A unique identifier for a wireless subscriber