EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED. FIRST PUBLISH OCTOBER 2024.
CREST CPSA Exam Study Guide with
Complete Solutions
Name all OSI layers - Answer✔✔-Application, Presentation, Session, Transport, Network, Data
Link, Physical.
Name all TCP/IP layers - Answer✔✔-Application, Transport, internet, Network Access.
Name Four TCP head flags - Answer✔✔-ACK, FIN, SYN, URG, PSH, RST
Which layer does HTTP protocl reside in the OSI model. - Answer✔✔-Layer 7, Application.
Which layer does Ethernet reside in the OSI model. - Answer✔✔-Layer 2, Data link.
Which Layer does IPv4 & IPv6 reside in TCP/IP model. - Answer✔✔-Layer 4, transport.
RFC 1918 addresses - Answer✔✔-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. - Answer✔✔-Well Known(0-1023),
Registed(1024-49,151) & Dynamic(49,152-65,535)
What is an ephemeral port? - Answer✔✔-An ephemeral port is a short-lived transport protocol
port for Internet Protocol (IP) communications. Can be used by both TCP & UDP.
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, EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED. FIRST PUBLISH OCTOBER 2024.
What does IANA stand for? - Answer✔✔-Internet Assigned Numbers Authority
Name 10 common ports and there protocols. - Answer✔✔-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. - Answer✔✔-LAN, WAN, MAN, VLAN, WLAN, PAN.
Name five network topologies - Answer✔✔-Mesh, Ring, star, Tree, Bus.
Name five common ethernet and FDDI cable types. - Answer✔✔-100Base5, 10Base2, 10BaseT,
100Base-FL, 1000Base-T.
What is WIFI the alias for? - Answer✔✔-IEEE 802.11
What does VLAN stand for? - Answer✔✔-Virtual Local Area Network
How does VLAN work? - Answer✔✔-Virtual Local Area Networks (VLANs) separate an existing
physical network into multiple logical networks.
Thus, each VLAN creates its own broadcast domain. Communication between two VLANs can
only occur through a router that is connected to both.
Name five common ICMP types. - Answer✔✔-8-echo, 0-echo reply, 30-trace route, 5-redirect, 3-
destination unreachable, 11, time execeed.
What does ICMP stand for? - Answer✔✔-Internet Control Message Protocol
What does TTL stand for? - Answer✔✔-Time to Live
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