CREST CPSA TEST PAPER 2026 ALL PHYSICAL
SECURITY TOPICS UPDATED ANSWERS
GRADED A+
◉ TCP. Answer: Transmission Control Protocol
◉ Port 22. Answer: SSH
◉ SSH. Answer: Secure Shell
◉ Port 23. Answer: Telnet
◉ Port 25. Answer: SMTP
◉ SMTP. Answer: Simple Mail Transfer Protocol
◉ Port 49. Answer: TACACS
◉ TACACS. Answer: Terminal Access Controller Access Control
System
,◉ Port 53. Answer: DNS
◉ DNS. Answer: Domain Name System
◉ Port 67 (UDP). Answer: DHCP (Server)
◉ Port 68 (UDP). Answer: DHCP (Client)
◉ DHCP. Answer: Dynamic Host Configuration Protocol
◉ Port 69 (UDP). Answer: TFTP
◉ TFTP. Answer: Trivial File Transfer Protocol
◉ Port 80. Answer: HTTP
◉ HTTP. Answer: Hypertext Transfer Protocol
◉ Port 88. Answer: Kerberos
,◉ Kerberos. Answer: A computer network authentication protocol that
works on the basis of tickets to allow nodes communicating over a non-
secure network to prove their identity to one another in a secure manner
◉ Port 110. Answer: POP3
◉ POP3. Answer: Post Office Protocol version 3
◉ Port 111. Answer: RPC
◉ RPC. Answer: Remote Procedure Call
◉ Port 123. Answer: NTP
◉ NTP. Answer: Network Time Protocol
◉ Port 135. Answer: Windows RPC (EPM)
◉ Port 593. Answer: RPC over HTTPS
◉ Port 445. Answer: SMB
, ◉ SMB. Answer: Server Message Block
◉ Port 137 (UDP). Answer: NetBIOS (name services)
◉ Port 138 (UDP). Answer: NetBIOS (datagram services)
◉ Port 139. Answer: NetBIOS (session services)
◉ NetBIOS. Answer: Network Basic Input/Output System
◉ Port 143. Answer: IMAP
◉ IMAP. Answer: Internet Message Access Protocol
◉ Port 161 (UDP). Answer: SNMP
◉ SNMP. Answer: Simple Network Management Protocol
◉ Port 179. Answer: BGP
◉ BGP. Answer: Border Gateway Protocol
SECURITY TOPICS UPDATED ANSWERS
GRADED A+
◉ TCP. Answer: Transmission Control Protocol
◉ Port 22. Answer: SSH
◉ SSH. Answer: Secure Shell
◉ Port 23. Answer: Telnet
◉ Port 25. Answer: SMTP
◉ SMTP. Answer: Simple Mail Transfer Protocol
◉ Port 49. Answer: TACACS
◉ TACACS. Answer: Terminal Access Controller Access Control
System
,◉ Port 53. Answer: DNS
◉ DNS. Answer: Domain Name System
◉ Port 67 (UDP). Answer: DHCP (Server)
◉ Port 68 (UDP). Answer: DHCP (Client)
◉ DHCP. Answer: Dynamic Host Configuration Protocol
◉ Port 69 (UDP). Answer: TFTP
◉ TFTP. Answer: Trivial File Transfer Protocol
◉ Port 80. Answer: HTTP
◉ HTTP. Answer: Hypertext Transfer Protocol
◉ Port 88. Answer: Kerberos
,◉ Kerberos. Answer: A computer network authentication protocol that
works on the basis of tickets to allow nodes communicating over a non-
secure network to prove their identity to one another in a secure manner
◉ Port 110. Answer: POP3
◉ POP3. Answer: Post Office Protocol version 3
◉ Port 111. Answer: RPC
◉ RPC. Answer: Remote Procedure Call
◉ Port 123. Answer: NTP
◉ NTP. Answer: Network Time Protocol
◉ Port 135. Answer: Windows RPC (EPM)
◉ Port 593. Answer: RPC over HTTPS
◉ Port 445. Answer: SMB
, ◉ SMB. Answer: Server Message Block
◉ Port 137 (UDP). Answer: NetBIOS (name services)
◉ Port 138 (UDP). Answer: NetBIOS (datagram services)
◉ Port 139. Answer: NetBIOS (session services)
◉ NetBIOS. Answer: Network Basic Input/Output System
◉ Port 143. Answer: IMAP
◉ IMAP. Answer: Internet Message Access Protocol
◉ Port 161 (UDP). Answer: SNMP
◉ SNMP. Answer: Simple Network Management Protocol
◉ Port 179. Answer: BGP
◉ BGP. Answer: Border Gateway Protocol