1 | P a g e | © copyright 2024/2025 | Grade A+
CREST CPSA Latest Questions and
Answers Rated 100% Correct
Name all OSI layers
✓ <~~> Application, Presentation, Session, Transport, Network, Data Link,
Physical.
Name all TCP/IP layers
✓ <~~> Application, Transport, internet, Network Access.
Name Four TCP head flags
✓ <~~> ACK, FIN, SYN, URG, PSH, RST
Which layer does HTTP protocl reside in the OSI model.
✓ <~~> Layer 7, Application.
Which layer does Ethernet reside in the OSI model.
✓ <~~> Layer 2, Data link.
Which Layer does IPv4 & IPv6 reside in TCP/IP model.
Master01 | September, 2024/2025 | Latest update
, 1 | P a g e | © copyright 2024/2025 | Grade A+
✓ <~~> Layer 4, transport.
RFC 1918 addresses
✓ <~~> 10.0.0.0 - 10.255.255.255 (10/8 prefix)
172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
Name the well know, registered and dynamic port ranges.
✓ <~~> Well Known(0-1023), Registed(1024-49,151) & Dynamic(49,152-
65,535)
What is an ephemeral port?
✓ <~~> An ephemeral port is a short-lived transport protocol port for
Internet Protocol (IP) communications. Can be used by both TCP &
UDP.
What does IANA stand for?
✓ <~~> Internet Assigned Numbers Authority
Name 10 common ports and there protocols.
Master01 | September, 2024/2025 | Latest update
, 1 | P a g e | © copyright 2024/2025 | Grade A+
✓ <~~> FTP21, SSH22, DHCP67(C), DHCP68(S), NTP123, MYSQL3306,
RDP3389, HTTP80, HTTPS443, SMB445, KERBEROS88, CHARGEN19(UDP),
DNS53, TACAS49, WHOIS43, MSSQL1433, HIDDEN MSSQL2433.
Name five network types.
✓ <~~> LAN, WAN, MAN, VLAN, WLAN, PAN.
Name five network topologies
✓ <~~> Mesh, Ring, star, Tree, Bus.
Name five common ethernet and FDDI cable types.
✓ <~~> 100Base5, 10Base2, 10BaseT, 100Base-FL, 1000Base-T.
What is WIFI the alias for?
✓ <~~> IEEE 802.11
What does VLAN stand for?
✓ <~~> Virtual Local Area Network
How does VLAN work?
Master01 | September, 2024/2025 | Latest update