WGU D316 Practice questions and
Verified Answers
...solution retains some sort of copper wiring to the customer premises while extending the
fiber link from the point of presence to a communications cabinet servicing multiple
subscribers.
Fiber to the curb (FTTC)
...achieves higher bit rates than other DSL types at the expense of range.
Very high-speed DSL (VDSL). Allows for both symmetric and asymmetric modes
...Internet connection means that the service provider's fiber optic cable is run all the way
to the customer's building.
fiber to the premises (FTTP)
Optical network terminal (ONT)
converts the optical signal to an electrical one. The ONT is connected to the customer's router
using an RJ45 copper wire patch cord.
...uses ground-based long-range fixed access wireless technology.
Wireless internet service provider (WISP)
...allows subscribers to use a removable subscriber identity module (SIM) card to use
an unlocked handset with their chosen network provider.
Global System for Mobile Communication (GSM)
...the handset is directly managed by the provider and there is no removable SIM card.
Code Division Multiple Access (CDMA)
An IPv4 address is how many bits long?
,32 bits long.
What does the router use to convert between the private and public addresses?
Network address translation (NAT)
What is the minimum configurations for a host to communicate on an IPv4 network?
Each host must be configured with an IP address and subnet mask at a minimum
to communicate on an IPv4 network.
How many bits and how is an IPv6 address written?
An IPv6 address is a 128-bit number and is written in hexadecimal notation.
What are the two main parts of an IPv6 address?
the first 64 bits are used as a network ID, while the second 64 bits designate a specific interface.
What is "dual stack"?
Most hosts and routers can operate both IPv4 and IPv6 at the same time. This is referred to
as "dual stack."
TCP sends what packets?
SYN, SYN/ACK, and ACK packets. FIN packets. Allows the receiver to send a negative
acknowledgement (NACK) to force retransmission of a missing or damaged packet.
DHCP requests and TFTP use TCP or UDP?
UDP
TCP Protocols
FTP, SSH, Telnet, SMTP, DNS, HTTP, POP, IMAP, SMB HTTPS, LDAP, RDP
UDP Protocols
DNS, DHCP (Client/Server), SNMP
, Host name can be combined with a domain name and suffix equals...
Fully qualified domain name (FQDN)
DNS "A" record
An address (A) record is used to resolve a host name to an IPv4 address.
DNS "AAAA" record
An AAAA record resolves a host name to an IPv6 address.
DNS "MX" record
A Mail Exchange (MX) record is used to identify an email server for the domain so that
other servers can send messages to it.
DNS "TXT" record
A TXT record is used to store any free-form text that may be needed to support other
network services.
...uses a TXT resource record published via DNS by an organization hosting email service.
Sender Policy Framework (SPF)
...uses cryptography to validate the source server for a given email message.
DomainKeys Identified Mail (DKIM)
...framework ensures that SPF and DKIM are being utilized effectively. Can use SPF or DKIM or
both.
Domain-Based Message Authentication, Reporting, and Conformance (DMARC)
Problems have ______, __________, and __________________.
causes, symptoms, and consequences.
6 Steps of Troubleshooting Model...
Verified Answers
...solution retains some sort of copper wiring to the customer premises while extending the
fiber link from the point of presence to a communications cabinet servicing multiple
subscribers.
Fiber to the curb (FTTC)
...achieves higher bit rates than other DSL types at the expense of range.
Very high-speed DSL (VDSL). Allows for both symmetric and asymmetric modes
...Internet connection means that the service provider's fiber optic cable is run all the way
to the customer's building.
fiber to the premises (FTTP)
Optical network terminal (ONT)
converts the optical signal to an electrical one. The ONT is connected to the customer's router
using an RJ45 copper wire patch cord.
...uses ground-based long-range fixed access wireless technology.
Wireless internet service provider (WISP)
...allows subscribers to use a removable subscriber identity module (SIM) card to use
an unlocked handset with their chosen network provider.
Global System for Mobile Communication (GSM)
...the handset is directly managed by the provider and there is no removable SIM card.
Code Division Multiple Access (CDMA)
An IPv4 address is how many bits long?
,32 bits long.
What does the router use to convert between the private and public addresses?
Network address translation (NAT)
What is the minimum configurations for a host to communicate on an IPv4 network?
Each host must be configured with an IP address and subnet mask at a minimum
to communicate on an IPv4 network.
How many bits and how is an IPv6 address written?
An IPv6 address is a 128-bit number and is written in hexadecimal notation.
What are the two main parts of an IPv6 address?
the first 64 bits are used as a network ID, while the second 64 bits designate a specific interface.
What is "dual stack"?
Most hosts and routers can operate both IPv4 and IPv6 at the same time. This is referred to
as "dual stack."
TCP sends what packets?
SYN, SYN/ACK, and ACK packets. FIN packets. Allows the receiver to send a negative
acknowledgement (NACK) to force retransmission of a missing or damaged packet.
DHCP requests and TFTP use TCP or UDP?
UDP
TCP Protocols
FTP, SSH, Telnet, SMTP, DNS, HTTP, POP, IMAP, SMB HTTPS, LDAP, RDP
UDP Protocols
DNS, DHCP (Client/Server), SNMP
, Host name can be combined with a domain name and suffix equals...
Fully qualified domain name (FQDN)
DNS "A" record
An address (A) record is used to resolve a host name to an IPv4 address.
DNS "AAAA" record
An AAAA record resolves a host name to an IPv6 address.
DNS "MX" record
A Mail Exchange (MX) record is used to identify an email server for the domain so that
other servers can send messages to it.
DNS "TXT" record
A TXT record is used to store any free-form text that may be needed to support other
network services.
...uses a TXT resource record published via DNS by an organization hosting email service.
Sender Policy Framework (SPF)
...uses cryptography to validate the source server for a given email message.
DomainKeys Identified Mail (DKIM)
...framework ensures that SPF and DKIM are being utilized effectively. Can use SPF or DKIM or
both.
Domain-Based Message Authentication, Reporting, and Conformance (DMARC)
Problems have ______, __________, and __________________.
causes, symptoms, and consequences.
6 Steps of Troubleshooting Model...
