CREST CPSA LATEST 2026 STUDY GUIDE QUESTIONS AND
ANSWERS GUARANTEE A+
✔✔Command : Display File Contents - ✔✔Linux: cat <file>
Windows: cat <file>
✔✔nslookup - ✔✔A network administration command-line tool for querying the Domain
Name System (DNS) to obtain domain name or IP address mapping or for any other
specific DNS record.
✔✔IIS 1 Defaults - ✔✔Windows NT Addon
✔✔IIS 2 Defaults - ✔✔NT 4.0
✔✔IIS 3 Defaults - ✔✔NT 4 Service Pack
✔✔IIS 4 Defaults - ✔✔NT4 Option Pack
✔✔IIS 5 Defaults - ✔✔Windows 2000
✔✔IIS 5.1 Defaults - ✔✔Windows XP
✔✔IIS 6 Defaults - ✔✔Windows Server 2003, Windows XP Pro
✔✔IIS 7 Defaults - ✔✔Windows Vista, Server 2008
✔✔IIS 7.5 Defaults - ✔✔Windows 7, 2008 R2
✔✔IIS 8 Defaults - ✔✔Windows Server 2012, Windows 8
✔✔IIS 8.5 Defaults - ✔✔Windows Server 2012 R2, Windows 8.1
✔✔IIS 10 v 1607 Defaults - ✔✔Windows Server 2016, Windows 10 Anniversary Update
✔✔IIS 10 v 1709 Defaults - ✔✔Windows 10 Fall Creators, v1709
✔✔IIS 10 v 1809 Defaults - ✔✔Windows Server 2019, Windows 10 October Update
✔✔Windows Command : Disable Firewall - ✔✔netsh advfirewall set currentprofile state
off
netsh advfirewall set allprofiles state off
✔✔Sysinternals Suite - ✔✔A set of powerful Windows administration applications used
to view, troubleshoot, and modify Windows functions
,✔✔WMCI - ✔✔Windows Management Instrumentation Command-Line
✔✔WMCI Command : Execute Process - ✔✔wmci process call create "process_name"
✔✔WMCI Command : Uninstall Software - ✔✔wmci product get name /value
wmci product where name="XX" call uninstall /nointeractive
✔✔PCI Card Info Storage Common-Use - ✔✔- Store card details (i.e CC number,
expiry) in encrypted form
- Store cardholder details (name, address, contact details...ie PII) in a SEPARATE
encrypted database with a unique reference identifier linking the two
-DO NOT STORE sensitive data (ie CVV2, CVV or CID values)
✔✔Windows : Active Directory Default Location - ✔✔C:\Windows\NTDS
Ntds.dit is the physical storage file
✔✔Windows : Domain Common Folders - ✔✔C:\Windows\SYSVOL
Contains Group Policies, Login Scripts, Staging Folders, etc.
✔✔dsquery - ✔✔Remote Server Administration Tools (RSAT) feature pack tool used to
enumerate Windows Domain
✔✔Classful IP Range : Class A - ✔✔128 Networks (2^7), 16,777,216 Addresses per
network (2^24)
Range : 0.0.0.0-127.0.0.0
Default Subnet Mask : 255.0.0.0
CIDR Notation : /8
✔✔Classful IP Range : Class B - ✔✔16,384 Networks (2^14), 65,536 Addresses per
network (2^16)
Range : 128.0.0.0-191.255.0.0
Default Subnet Mask : 255.255.0.0
CIDR Notation : /16
✔✔Classful IP Range : Class C - ✔✔2,097,152 Networks (2^21), 256 Addresses per
network (2^8)
Range : 192.0.0.0-223.255.255.0
Default Subnet Mask : 255.255.255.0
CIDR Notation : /24
, ✔✔Classful IP Range Calculation - ✔✔If the first bit is a "0", it's a class A address (Half
the address space has a "0" for the first bit, so this is why class A takes up half the
address space.)
If the second bit is a "0", it's a class B address (Half of the remaining non-class-A
addresses, or one quarter of the total.)
If the third bit is a "0", it's a class C address (Half again of what's left, or one eighth of
the total.)
If the fourth bit is a "0", it's a class D address. (Half the remainder, or one sixteenth of
the address space.) If it's a "1", it's a class E address. (The other half, one sixteenth.)
✔✔Classless Subnets / CIDR - ✔✔Class C - 255.255.255.0 , /24 (254 Hosts)
Class B - 255.255.0.0 , /16 (65,534 Hosts)
Class A - 255.0.0.0 , /8 (16,777,214 Hosts)
✔✔CRITICAL SUBNET INFO - ✔✔RTFM page 36
✔✔Hexadecimal Chart - ✔✔0
1
2
3
4
5
6
7
8
9
10 - A
11 - B
12 - C
13 - D
14 - E
15 - F
✔✔VLAN - ✔✔A switched network that is logically segmented by function, project team,
or application, without regard to the physical locations of the users.
✔✔VLAN IDs 1002-1005 - ✔✔Token Ring and FDDI VLANs
✔✔VLAN IDs greater than 1005 - ✔✔Extended-range VLANs (not stored in the VLAN
database)
ANSWERS GUARANTEE A+
✔✔Command : Display File Contents - ✔✔Linux: cat <file>
Windows: cat <file>
✔✔nslookup - ✔✔A network administration command-line tool for querying the Domain
Name System (DNS) to obtain domain name or IP address mapping or for any other
specific DNS record.
✔✔IIS 1 Defaults - ✔✔Windows NT Addon
✔✔IIS 2 Defaults - ✔✔NT 4.0
✔✔IIS 3 Defaults - ✔✔NT 4 Service Pack
✔✔IIS 4 Defaults - ✔✔NT4 Option Pack
✔✔IIS 5 Defaults - ✔✔Windows 2000
✔✔IIS 5.1 Defaults - ✔✔Windows XP
✔✔IIS 6 Defaults - ✔✔Windows Server 2003, Windows XP Pro
✔✔IIS 7 Defaults - ✔✔Windows Vista, Server 2008
✔✔IIS 7.5 Defaults - ✔✔Windows 7, 2008 R2
✔✔IIS 8 Defaults - ✔✔Windows Server 2012, Windows 8
✔✔IIS 8.5 Defaults - ✔✔Windows Server 2012 R2, Windows 8.1
✔✔IIS 10 v 1607 Defaults - ✔✔Windows Server 2016, Windows 10 Anniversary Update
✔✔IIS 10 v 1709 Defaults - ✔✔Windows 10 Fall Creators, v1709
✔✔IIS 10 v 1809 Defaults - ✔✔Windows Server 2019, Windows 10 October Update
✔✔Windows Command : Disable Firewall - ✔✔netsh advfirewall set currentprofile state
off
netsh advfirewall set allprofiles state off
✔✔Sysinternals Suite - ✔✔A set of powerful Windows administration applications used
to view, troubleshoot, and modify Windows functions
,✔✔WMCI - ✔✔Windows Management Instrumentation Command-Line
✔✔WMCI Command : Execute Process - ✔✔wmci process call create "process_name"
✔✔WMCI Command : Uninstall Software - ✔✔wmci product get name /value
wmci product where name="XX" call uninstall /nointeractive
✔✔PCI Card Info Storage Common-Use - ✔✔- Store card details (i.e CC number,
expiry) in encrypted form
- Store cardholder details (name, address, contact details...ie PII) in a SEPARATE
encrypted database with a unique reference identifier linking the two
-DO NOT STORE sensitive data (ie CVV2, CVV or CID values)
✔✔Windows : Active Directory Default Location - ✔✔C:\Windows\NTDS
Ntds.dit is the physical storage file
✔✔Windows : Domain Common Folders - ✔✔C:\Windows\SYSVOL
Contains Group Policies, Login Scripts, Staging Folders, etc.
✔✔dsquery - ✔✔Remote Server Administration Tools (RSAT) feature pack tool used to
enumerate Windows Domain
✔✔Classful IP Range : Class A - ✔✔128 Networks (2^7), 16,777,216 Addresses per
network (2^24)
Range : 0.0.0.0-127.0.0.0
Default Subnet Mask : 255.0.0.0
CIDR Notation : /8
✔✔Classful IP Range : Class B - ✔✔16,384 Networks (2^14), 65,536 Addresses per
network (2^16)
Range : 128.0.0.0-191.255.0.0
Default Subnet Mask : 255.255.0.0
CIDR Notation : /16
✔✔Classful IP Range : Class C - ✔✔2,097,152 Networks (2^21), 256 Addresses per
network (2^8)
Range : 192.0.0.0-223.255.255.0
Default Subnet Mask : 255.255.255.0
CIDR Notation : /24
, ✔✔Classful IP Range Calculation - ✔✔If the first bit is a "0", it's a class A address (Half
the address space has a "0" for the first bit, so this is why class A takes up half the
address space.)
If the second bit is a "0", it's a class B address (Half of the remaining non-class-A
addresses, or one quarter of the total.)
If the third bit is a "0", it's a class C address (Half again of what's left, or one eighth of
the total.)
If the fourth bit is a "0", it's a class D address. (Half the remainder, or one sixteenth of
the address space.) If it's a "1", it's a class E address. (The other half, one sixteenth.)
✔✔Classless Subnets / CIDR - ✔✔Class C - 255.255.255.0 , /24 (254 Hosts)
Class B - 255.255.0.0 , /16 (65,534 Hosts)
Class A - 255.0.0.0 , /8 (16,777,214 Hosts)
✔✔CRITICAL SUBNET INFO - ✔✔RTFM page 36
✔✔Hexadecimal Chart - ✔✔0
1
2
3
4
5
6
7
8
9
10 - A
11 - B
12 - C
13 - D
14 - E
15 - F
✔✔VLAN - ✔✔A switched network that is logically segmented by function, project team,
or application, without regard to the physical locations of the users.
✔✔VLAN IDs 1002-1005 - ✔✔Token Ring and FDDI VLANs
✔✔VLAN IDs greater than 1005 - ✔✔Extended-range VLANs (not stored in the VLAN
database)
