CREST CPSA 2025-2026 LATEST UPDATE COMPLETE
FREQUENTLY MOST TESTED QUESTIONS WITH
VERIFIED ANSWERS
TCP ||-CORRECTANSWER ||Transmission ||Control ||Protocol
UDP ||-CORRECTANSWER ||User ||Datagram ||Protocol
Port ||21 ||-CORRECTANSWER ||FTP
FTP ||-CORRECTANSWER ||File ||Transfer ||Protocol
Port ||22 ||-CORRECTANSWER ||SSH
SSH ||-CORRECTANSWER ||Secure ||Shell
Port ||23 ||-CORRECTANSWER ||Telnet
Port ||25 ||-CORRECTANSWER ||SMTP
SMTP ||-CORRECTANSWER ||Simple ||Mail ||Transfer ||Protocol
,Port ||49 ||-CORRECTANSWER ||TACACS
TACACS ||-CORRECTANSWER ||Terminal ||Access ||Controller ||Access ||Control ||System
Port ||53 ||-CORRECTANSWER ||DNS
DNS ||-CORRECTANSWER ||Domain ||Name ||System
Port ||67 ||(UDP) ||-CORRECTANSWER ||DHCP ||(Server)
Port ||68 ||(UDP) ||-CORRECTANSWER ||DHCP ||(Client)
DHCP ||-CORRECTANSWER ||Dynamic ||Host ||Configuration ||Protocol
Port ||69 ||(UDP) ||-CORRECTANSWER ||TFTP
TFTP ||-CORRECTANSWER ||Trivial ||File ||Transfer ||Protocol
Port ||80 ||-CORRECTANSWER ||HTTP
HTTP ||-CORRECTANSWER ||Hypertext ||Transfer ||Protocol
Port ||88 ||-CORRECTANSWER ||Kerberos
,Kerberos ||-CORRECTANSWER ||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 ||-CORRECTANSWER ||POP3
POP3 ||-CORRECTANSWER ||Post ||Office ||Protocol ||version ||3
Port ||111 ||-CORRECTANSWER ||RPC
RPC ||-CORRECTANSWER ||Remote ||Procedure ||Call
Port ||123 ||-CORRECTANSWER ||NTP
NTP ||-CORRECTANSWER ||Network ||Time ||Protocol
Port ||135 ||-CORRECTANSWER ||Windows ||RPC ||(EPM)
Port ||593 ||-CORRECTANSWER ||RPC ||over ||HTTPS
Port ||445 ||-CORRECTANSWER ||SMB
, SMB ||-CORRECTANSWER ||Server ||Message ||Block
Port ||137 ||(UDP) ||-CORRECTANSWER ||NetBIOS ||(name ||services)
Port ||138 ||(UDP) ||-CORRECTANSWER ||NetBIOS ||(datagram ||services)
Port ||139 ||-CORRECTANSWER ||NetBIOS ||(session ||services)
NetBIOS ||-CORRECTANSWER ||Network ||Basic ||Input/Output ||System
Port ||143 ||-CORRECTANSWER ||IMAP
IMAP ||-CORRECTANSWER ||Internet ||Message ||Access ||Protocol
Port ||161 ||(UDP) ||-CORRECTANSWER ||SNMP
SNMP ||-CORRECTANSWER ||Simple ||Network ||Management ||Protocol
Port ||179 ||-CORRECTANSWER ||BGP
BGP ||-CORRECTANSWER ||Border ||Gateway ||Protocol
FREQUENTLY MOST TESTED QUESTIONS WITH
VERIFIED ANSWERS
TCP ||-CORRECTANSWER ||Transmission ||Control ||Protocol
UDP ||-CORRECTANSWER ||User ||Datagram ||Protocol
Port ||21 ||-CORRECTANSWER ||FTP
FTP ||-CORRECTANSWER ||File ||Transfer ||Protocol
Port ||22 ||-CORRECTANSWER ||SSH
SSH ||-CORRECTANSWER ||Secure ||Shell
Port ||23 ||-CORRECTANSWER ||Telnet
Port ||25 ||-CORRECTANSWER ||SMTP
SMTP ||-CORRECTANSWER ||Simple ||Mail ||Transfer ||Protocol
,Port ||49 ||-CORRECTANSWER ||TACACS
TACACS ||-CORRECTANSWER ||Terminal ||Access ||Controller ||Access ||Control ||System
Port ||53 ||-CORRECTANSWER ||DNS
DNS ||-CORRECTANSWER ||Domain ||Name ||System
Port ||67 ||(UDP) ||-CORRECTANSWER ||DHCP ||(Server)
Port ||68 ||(UDP) ||-CORRECTANSWER ||DHCP ||(Client)
DHCP ||-CORRECTANSWER ||Dynamic ||Host ||Configuration ||Protocol
Port ||69 ||(UDP) ||-CORRECTANSWER ||TFTP
TFTP ||-CORRECTANSWER ||Trivial ||File ||Transfer ||Protocol
Port ||80 ||-CORRECTANSWER ||HTTP
HTTP ||-CORRECTANSWER ||Hypertext ||Transfer ||Protocol
Port ||88 ||-CORRECTANSWER ||Kerberos
,Kerberos ||-CORRECTANSWER ||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 ||-CORRECTANSWER ||POP3
POP3 ||-CORRECTANSWER ||Post ||Office ||Protocol ||version ||3
Port ||111 ||-CORRECTANSWER ||RPC
RPC ||-CORRECTANSWER ||Remote ||Procedure ||Call
Port ||123 ||-CORRECTANSWER ||NTP
NTP ||-CORRECTANSWER ||Network ||Time ||Protocol
Port ||135 ||-CORRECTANSWER ||Windows ||RPC ||(EPM)
Port ||593 ||-CORRECTANSWER ||RPC ||over ||HTTPS
Port ||445 ||-CORRECTANSWER ||SMB
, SMB ||-CORRECTANSWER ||Server ||Message ||Block
Port ||137 ||(UDP) ||-CORRECTANSWER ||NetBIOS ||(name ||services)
Port ||138 ||(UDP) ||-CORRECTANSWER ||NetBIOS ||(datagram ||services)
Port ||139 ||-CORRECTANSWER ||NetBIOS ||(session ||services)
NetBIOS ||-CORRECTANSWER ||Network ||Basic ||Input/Output ||System
Port ||143 ||-CORRECTANSWER ||IMAP
IMAP ||-CORRECTANSWER ||Internet ||Message ||Access ||Protocol
Port ||161 ||(UDP) ||-CORRECTANSWER ||SNMP
SNMP ||-CORRECTANSWER ||Simple ||Network ||Management ||Protocol
Port ||179 ||-CORRECTANSWER ||BGP
BGP ||-CORRECTANSWER ||Border ||Gateway ||Protocol
