WGU D481: Section 2 OA Exam Prep and Key Concepts
File Transfer Protocol (FTP) - correct answer ✔✔20/21 TCP
Secure Shell (SSH) - correct answer ✔✔22 TCP
Telnet - correct answer ✔✔23 TCP
SMTP - Simple Mail Transfer Protocol is used to send email over the internet - correct answer ✔✔25 TCP
DNS - Domain Name Service is used to resolve hostnames to IPs and IPs to hostnames - correct answer
✔✔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 - correct answer ✔✔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 - correct answer ✔✔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 - correct answer ✔✔69 UDP
Finger protocol (user information) - correct answer ✔✔79 TCP
HyperText Transfer Protocol (HTTP) (browsing websites) - correct answer ✔✔80 TCP
,Kerberos - correct answer ✔✔88 UDP
POP3 - Post Office Protocol v3 is used to receive email from a mail server - correct answer ✔✔110 TCP
IMAP - Internet Message Access Protocol is used to receive email from a mail server with more features
than POP3 - correct answer ✔✔143 TCP
Hypertext Transfer Protocol Secure (HTTPS) - correct answer ✔✔443 TCP
Lightweight Directory Access Protocol (LDAP) - correct answer ✔✔389 TCP/UDP
Lightweight Directory Access Protocol Secure (LDAPS) - correct answer ✔✔636 TCP/UDP
Remote Desktop Protocol (RDP) - correct answer ✔✔3389 TCP/UDP
How are analog transmissions waves measured which is the number of cycles per second that's
measured? - correct answer ✔✔Frequency (also called hertz)
A Physical Layer device that converts an Ethernet signal from, for example, fiber optic to copper
transmission media - correct answer ✔✔Media converter
1-green/white, 2-green, 3-orange/white, 6-orange - correct answer ✔✔TIA-568A Wiring Pin Colors
1- orange/white, 2-orange, 3-green/white, 6-green - correct answer ✔✔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 - correct answer ✔✔Flat backbone
Minimizes traffic flowing between departmental LANs by replacing a bus with one or more central
switches - correct answer ✔✔Collapsed backbone
, When an IP receives a packet from a higher layer and adds additional data in a new IP header to the
packet - correct answer ✔✔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 - correct answer ✔✔Drawbacks of a Collapsed backbone
when IP software chops packets into smaller packets - correct answer ✔✔Fragmentation
First three octets in an IPv4 address are what? - correct answer ✔✔Network ID
The last octet in an IPv4 address is what? - correct answer ✔✔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. - correct answer
✔✔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 - correct answer ✔✔Port Network Address
Translation (PAT):
You may omit any leading zeros within any group of hexadecimal digits.
You may replace only one grouping of two or more consecutive groupings of zeros in an address with a
double colon - correct answer ✔✔How to shorten an IPv6 Address
IPv6 methodology to send packets that sends a packet to a single destination - correct answer
✔✔Unicast
File Transfer Protocol (FTP) - correct answer ✔✔20/21 TCP
Secure Shell (SSH) - correct answer ✔✔22 TCP
Telnet - correct answer ✔✔23 TCP
SMTP - Simple Mail Transfer Protocol is used to send email over the internet - correct answer ✔✔25 TCP
DNS - Domain Name Service is used to resolve hostnames to IPs and IPs to hostnames - correct answer
✔✔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 - correct answer ✔✔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 - correct answer ✔✔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 - correct answer ✔✔69 UDP
Finger protocol (user information) - correct answer ✔✔79 TCP
HyperText Transfer Protocol (HTTP) (browsing websites) - correct answer ✔✔80 TCP
,Kerberos - correct answer ✔✔88 UDP
POP3 - Post Office Protocol v3 is used to receive email from a mail server - correct answer ✔✔110 TCP
IMAP - Internet Message Access Protocol is used to receive email from a mail server with more features
than POP3 - correct answer ✔✔143 TCP
Hypertext Transfer Protocol Secure (HTTPS) - correct answer ✔✔443 TCP
Lightweight Directory Access Protocol (LDAP) - correct answer ✔✔389 TCP/UDP
Lightweight Directory Access Protocol Secure (LDAPS) - correct answer ✔✔636 TCP/UDP
Remote Desktop Protocol (RDP) - correct answer ✔✔3389 TCP/UDP
How are analog transmissions waves measured which is the number of cycles per second that's
measured? - correct answer ✔✔Frequency (also called hertz)
A Physical Layer device that converts an Ethernet signal from, for example, fiber optic to copper
transmission media - correct answer ✔✔Media converter
1-green/white, 2-green, 3-orange/white, 6-orange - correct answer ✔✔TIA-568A Wiring Pin Colors
1- orange/white, 2-orange, 3-green/white, 6-green - correct answer ✔✔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 - correct answer ✔✔Flat backbone
Minimizes traffic flowing between departmental LANs by replacing a bus with one or more central
switches - correct answer ✔✔Collapsed backbone
, When an IP receives a packet from a higher layer and adds additional data in a new IP header to the
packet - correct answer ✔✔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 - correct answer ✔✔Drawbacks of a Collapsed backbone
when IP software chops packets into smaller packets - correct answer ✔✔Fragmentation
First three octets in an IPv4 address are what? - correct answer ✔✔Network ID
The last octet in an IPv4 address is what? - correct answer ✔✔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. - correct answer
✔✔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 - correct answer ✔✔Port Network Address
Translation (PAT):
You may omit any leading zeros within any group of hexadecimal digits.
You may replace only one grouping of two or more consecutive groupings of zeros in an address with a
double colon - correct answer ✔✔How to shorten an IPv6 Address
IPv6 methodology to send packets that sends a packet to a single destination - correct answer
✔✔Unicast
