Tim is told to carry out a SYN scan on some potentially vulnerable systems. What is another name for this type of scan?
A.
Handshake
B.
TCP
C.
Half open
D.
ACK
Explanation:
SYN scan is another form of TCP scanning. Rather than use the operating
system’s network functions, the port scanner generates raw IP packets itself, and
monitors for responses. This scan type is also known as "half-open
scanning", because it never actually opens a full TCP connection.
Syn Scan = TCP Scan = Half-Scan,the answer are “B” & “C”?
luść jaskini wyróżniała się z Brady świata smolistą czernią.
Oraz dodatkowo dochodzącym spośród niej straszliwym
smrodem. Czołgając się rycerz wyczuwał błogie drżenie
ziemi, wzbudzone smoczym chrapaniem. St.
I hate questions such as this, as C is “more correct” than B. UGH.
A half open scan is a SYN packet sent as if a real connection is going to be opened and then wait for a response. A SYN/ACK indicates the port is listening (open), while a RST (reset) is indicative of a non-listener. If no response is received after several retransmissions, the port is marked as filtered.
Details of Port Scanning Techniques here:
http://nmap.org/book/man-port-scanning-techniques.html