network threats

Question 1

denial of service (DoS)

Answer 1

• atk meant to shut down machine/network, rendering it inaccessible to its intended users
• by sending req at a rate higher than what the server can handle

Question 2

how prevent DoS

Answer 2

by using firewall to detect large num of data packets originating frm the same source

Question 3

distributed denial of service (DDoS)

Answer 3

more sophisticated atk might use botnet to send network req frm multiple source comp, making it harder for host to detect such attempts & block them

Question 4

virus

Answer 4

• malware that can be embedded into files that the user downloads.
• when opened, virus is executed and can log keystrokes of the comp / leak other kinds of sensitive information to the attacker

Question 5

trojan

Answer 5

• malware that disguises itself as a harmless program sent to users as innocent-looking files
• when opened, the malicious code can then search for sensitive information on the computer and send it to the attacker