Given the received codeword 1010011000 and the divisor 1011. Show the checking of the codeword at the receiver site. Is it the correct data sent?

You are working as a security analyst in a company xyz that owns the whole subnet range of 23.0.0.0/8 and 192.168.0.0/8. while monitoring the data, you find a high number of outbound connections. you see that ip's owned by xyz (internal) and private ip's are communicating to a single public ip. therefore, the internal ip's are sending data to the public ip. after further analysis, you find out that this public ip is a blacklisted ip, and the internal communicating devices are compromised. what kind of attack does the above scenario depict?

How many nibbles can be stored in a 16-bit word?

Whats three fourths of 15(this is supposed to be in math but i clicked too fast)