SECURITY FOUNDATIONS - D481 – OA EXAM 2024
QUESTIONS WITH COMPLETE SOLUTIONS
File Transfer Protocol (FTP)
20/21 TCP
Secure Shell (SSH)
22 TCP
Telnet
23 TCP
SMTP - Simple Mail Transfer Protocol is used to send email over the internet
25 TCP
DNS - Domain Name Service is used to resolve hostnames to IPs and IPs to
hostnames
53 TCP/UDP
DHCP - Dynamic Host Configuration Protocol. Auto config. of IP address, subnet
mask & other options. Requires a DHCP server, and appliance integrated into a
SOHO router.
Server to Client - Sends Message
67 UDP
DHCP - Dynamic Host Configuration Protocol. Auto config. of IP address, subnet
mask & other options. Requires a DHCP server, and appliance integrated into a
SOHO router.
Client to Server - Receives Message
68 UDP
,TFTP - Trivial FTP is used as a simplified version of FTP to put a file on a remote
host, or get a file from a remote host
69 UDP
Finger protocol (user information)
79 TCP
HyperText Transfer Protocol (HTTP) (browsing websites)
80 TCP
Kerberos
88 UDP
POP3 - Post Office Protocol v3 is used to receive email from a mail server
110 TCP
IMAP - Internet Message Access Protocol is used to receive email from a mail
server with more features than POP3
143 TCP
Hypertext Transfer Protocol Secure (HTTPS)
443 TCP
Lightweight Directory Access Protocol (LDAP)
389 TCP/UDP
Lightweight Directory Access Protocol Secure (LDAPS)
636 TCP/UDP
Remote Desktop Protocol (RDP)
3389 TCP/UDP
How are analog transmissions waves measured which is the number of cycles
per second that's measured?
Frequency (also called hertz)
A Physical Layer device that converts an Ethernet signal from, for example, fiber
optic to copper transmission media
Media converter
1-green/white, 2-green, 3-orange/white, 6-orange
TIA-568A Wiring Pin Colors
1- orange/white, 2-orange, 3-green/white, 6-green
, TIA-568B Wiring Pin Colors
Backbone that's more restrictive because they must rely on physical device
location to isolate departmental LANs from one another
Flat backbone
Minimizes traffic flowing between departmental LANs by replacing a bus with one
or more central switches
Collapsed backbone
When an IP receives a packet from a higher layer and adds additional data in a
new IP header to the packet
Encapsulation
What is this drawbacks of?
Fiber optic cabling is required to connect each departmental LAN to the central
switch
The central switch represents a single point of failure. If the switch fails, no traffic
can travel between departmental LANs
Drawbacks of a Collapsed backbone
when IP software chops packets into smaller packets
Fragmentation
First three octets in an IPv4 address are what?
Network ID
The last octet in an IPv4 address is what?
Host ID
Translates the source IP address usually when connecting from a private to a
public IP address. Used when an internal/private host needs to initiate a
connection to an external/public host.
Source Network Address Translation (SNAT)
Maps internal IP addresses to public or external IP addresses. Allows one to
share a single, public-facing IP address with a range of internal , private IP host
addresses
QUESTIONS WITH COMPLETE SOLUTIONS
File Transfer Protocol (FTP)
20/21 TCP
Secure Shell (SSH)
22 TCP
Telnet
23 TCP
SMTP - Simple Mail Transfer Protocol is used to send email over the internet
25 TCP
DNS - Domain Name Service is used to resolve hostnames to IPs and IPs to
hostnames
53 TCP/UDP
DHCP - Dynamic Host Configuration Protocol. Auto config. of IP address, subnet
mask & other options. Requires a DHCP server, and appliance integrated into a
SOHO router.
Server to Client - Sends Message
67 UDP
DHCP - Dynamic Host Configuration Protocol. Auto config. of IP address, subnet
mask & other options. Requires a DHCP server, and appliance integrated into a
SOHO router.
Client to Server - Receives Message
68 UDP
,TFTP - Trivial FTP is used as a simplified version of FTP to put a file on a remote
host, or get a file from a remote host
69 UDP
Finger protocol (user information)
79 TCP
HyperText Transfer Protocol (HTTP) (browsing websites)
80 TCP
Kerberos
88 UDP
POP3 - Post Office Protocol v3 is used to receive email from a mail server
110 TCP
IMAP - Internet Message Access Protocol is used to receive email from a mail
server with more features than POP3
143 TCP
Hypertext Transfer Protocol Secure (HTTPS)
443 TCP
Lightweight Directory Access Protocol (LDAP)
389 TCP/UDP
Lightweight Directory Access Protocol Secure (LDAPS)
636 TCP/UDP
Remote Desktop Protocol (RDP)
3389 TCP/UDP
How are analog transmissions waves measured which is the number of cycles
per second that's measured?
Frequency (also called hertz)
A Physical Layer device that converts an Ethernet signal from, for example, fiber
optic to copper transmission media
Media converter
1-green/white, 2-green, 3-orange/white, 6-orange
TIA-568A Wiring Pin Colors
1- orange/white, 2-orange, 3-green/white, 6-green
, TIA-568B Wiring Pin Colors
Backbone that's more restrictive because they must rely on physical device
location to isolate departmental LANs from one another
Flat backbone
Minimizes traffic flowing between departmental LANs by replacing a bus with one
or more central switches
Collapsed backbone
When an IP receives a packet from a higher layer and adds additional data in a
new IP header to the packet
Encapsulation
What is this drawbacks of?
Fiber optic cabling is required to connect each departmental LAN to the central
switch
The central switch represents a single point of failure. If the switch fails, no traffic
can travel between departmental LANs
Drawbacks of a Collapsed backbone
when IP software chops packets into smaller packets
Fragmentation
First three octets in an IPv4 address are what?
Network ID
The last octet in an IPv4 address is what?
Host ID
Translates the source IP address usually when connecting from a private to a
public IP address. Used when an internal/private host needs to initiate a
connection to an external/public host.
Source Network Address Translation (SNAT)
Maps internal IP addresses to public or external IP addresses. Allows one to
share a single, public-facing IP address with a range of internal , private IP host
addresses
