Sliding Window
Explanation:
The Sliding Window protocol is a feature of packet-based data transmission protocols. It is used in the data link
layer (OSI model) as well as in TCP (transport layer of the OSI model). It is used to keep a record of the frame
sequences sent, and their respective acknowledgements received, by both the users. Its additional feature
over a simpler protocol is that can allow multiple packets to be "in transmission" simultaneously, rather than
waiting for each packet to be acknowledged before sending the next.In transmit flow control, sliding window is
a variable-duration window that allows a sender to transmit a specified number of data units before an
acknowledgment is received or before a specified event occurs.An example of a sliding window is one in
which, after the sender fails to receive an acknowledgment for the first transmitted frame, the sender "slides"
the window, i.e., resets the window, and sends a second frame. This process is repeated for the specified
number of times before the sender interrupts transmission. Sliding window is sometimes called
acknowledgment delay period.

The correct filter to detect UDP scan attempts using Wireshark is not listed among the options provided. To detect UDP scan attempts, a Wireshark filter that targets UDP traffic specifically would be used, rather than an ICMP type and code filter. A common method to detect a UDP scan is to look for a large amount of UDP packets sent to different ports, which can be indicative of a scanning activity. The filter would typically include parameters that isolate UDP traffic, such as udp.port or udp.dstport combined with a range or list of ports.
References: The information provided is based on standard practices for using Wireshark to detect network scanning activities, as outlined in resources like the InfosecMatter guide on detecting network attacks with Wireshark1. While the EC-Council's Certified Network Defender (CND) course materials would provide detailed methodologies for network defense, including the use of tools like Wireshark, the specific filters for detecting UDP scans would align with the general usage of Wireshark as described in various online resources and documentation1.