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choli [55]
3 years ago
7

Explain the purpose of the frame check sequence (fcs) field in a data link frame trailer.

Computers and Technology
1 answer:
Yuki888 [10]3 years ago
7 0
I think it's to make sure no plagerise 
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attackers typically use ack scans to get past a firewall or other filtering device. how does the process of an ack scan work to
bogdanovich [222]

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.

To learn more about ask scan refer to:

brainly.com/question/13055134

#SPJ4

3 0
1 year ago
Match the elements used in web searches to their functions.
Lorico [155]
Row - horizontal
Column - vertical
Cell - where data and formulas can be entered
Worksheet - a grid of rows and columns
7 0
3 years ago
Please answer........
Vitek1552 [10]

Using the try-except statement, the fix is as follows:

while True:

   try:

       boxes = int(input("How many boxes do you have?"))

       sweaters = int(input("How many sweaters do you have?"))

       break

   except:

       print("Input invalid")

sweatersPerBox = sweaters/boxes

print("You need to put",sweatersPerBox,"sweaters in each box")

<h3>How to prevent the program from crashing?</h3>

The program is given as:

boxes = int(input("How many boxes do you have?"))

sweaters = int(input("How many sweaters do you have?"))

sweatersPerBox = sweaters/boxes

print("You need to put",sweatersPerBox,"sweaters in each box")

The above program would crash when the user enters string inputs.

Examples of string inputs are "7h", "bh"...

One way to fix the error is the use of the try-except statement.

Using the try-except statement, the fix is as follows:

while True:

   try:

       boxes = int(input("How many boxes do you have?"))

       sweaters = int(input("How many sweaters do you have?"))

       break

   except:

       print("Input invalid")

sweatersPerBox = sweaters/boxes

print("You need to put",sweatersPerBox,"sweaters in each box")

The above program would continue running until the user enters a valid input

Another way is to end the program when the user enters string inputs

Read more about python programs at:

brainly.com/question/26497128

#SPJ1

7 0
2 years ago
Consider a hard disk with the following specifications :<br> 3.5 in diameter
AnnyKZ [126]

Answer:

usable capacity = 10 GB

Number of cylinders = 256

Block size = 4 KB

(1)Bytes in each cylinder = (10*230)/(256) = (10*222) = 40 MegaBytes

(2)Number of Blocks in each cylinder = (10*222)/(212) = 10K

(3)capacity of one track = 40 MegaBytes/(10*2) = 2 MB

Rotation speed = 3840 RPM

Number of rotations per second = 3840/60 = 64

Transfer rate = (2*64) = 128 MB/sec

Explanation:

6 0
3 years ago
Who initially developed what is now known as the internet?
Lyrx [107]

in 1990, when computer scientist Tim Berners-Lee invented the World Wide Web.

5 0
3 years ago
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