Google IT Support Professional Certificate • STUDY MODE
THE TRANSPORT LAYER
QUESTION 1 OF 4
What ordering of TCP flags makes up the Three-way Handshake?
A
a' FIN, FIN/ACK, ACK
B
b' SYN, ACK, SYN, ACK
C
c' SYN, ACK, FIN
D
d' SYN, SYN/ACK, ACKCorrect Answer
E
Great work! The computer that wants to establish a connection sends a packet with the SYN flag set. Then, the server responds with a packet with both the SYN and ACK flags set. Finally, the original computer sends a packet with just the ACK flag set.
QUESTION 2 OF 4
Transport layer protocols, like TCP and UDP, introduce the concept of a port. How many bits is a port field?
A
a' 4 bits
B
b' 8 bits
C
c' 16 bitsCorrect Answer
D
d' 32 bits
E
Nice job! A TCP or UDP port is a 16-bit number, meaning there are theoretically 65,535 possible values it can have.
QUESTION 3 OF 4
Please select all valid TCP control flags.
A
a' WAIT
B
b' URG
C
c' LISTEN
D
d' ACKCorrect Answer
E
e' CLOSE
F
f' RSTCorrect Answer
G
Nice job! ACK is short for acknowledged and means that the data was received.
H
You got it! RST is used to reset a connection if something has gone wrong.
QUESTION 4 OF 4
A device that blocks traffic that meets certain criteria is know as a ________.
A
a' Hub
B
b' Switch
C
c' FirewallCorrect Answer
D
d' Router
E
That's right! A firewall is used to block certain defined types of traffic.
Ready to test your recall?
What ordering of TCP flags makes up the Three-way Handshake?
A
a' FIN, FIN/ACK, ACK
B
b' SYN, ACK, SYN, ACK
C
c' SYN, ACK, FIN
D
d' SYN, SYN/ACK, ACK
E
Great work! The computer that wants to establish a connection sends a packet with the SYN flag set. Then, the server responds with a packet with both the SYN and ACK flags set. Finally, the original computer sends a packet with just the ACK flag set.