WGU C172 Networking & Security Actual Post Exam Questions and Accurate Answers version 2024/2025
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WGU C172 Network & Security
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WGU C172 Network & Security
WGU C172 Networking & Security Actual Post Exam Questions and Accurate Answers version 2024/2025
Root Servers - correct answer A group of servers that exist using well-known IP addresses that have been programmed into DNS servers
Domain Registrar - correct answer An organization that is autho...
WGU C172 Networking & Security Actual Post
Exam Questions and Accurate Answers
version 2024/2025
Root Servers - correct answer A group of servers that exist using well-known IP
addresses that have been programmed into DNS servers
Domain Registrar - correct answer An organization that is authorized to register
Internet domain names
PTR Record (Pointer Record) - correct answer The reverse of an A record; a mapping
of an IP address to a hostname
NS Record (Name Server Record) - correct answer A record that specifies the name of
the authoritative name server of the domain
MX Record (Mail Exchange Record) - correct answer A record that specifies the email-
handling server of the domain
TXT Record (Text Record) - correct answer A record that is used to hold arbitrary text
information of the domain
SPF (Sender Policy Framework) - correct answer can be used as validation of
legitimate sources of email from a domain
DKIM (domainKeys identified mail) - correct answer provides a way to validate a
domain name identity with an associated message through cryptographic authentication
SRV record (service record) - correct answer identify host(s) offering a specific type of
service
,AAAA record (quad-A record) - correct answer DNS record for IPv6
CBS (committed burst size) - correct answer traffic size that is allowed to burst; it is not
discarded or shaped by the profile
EIR (excess information rate) - correct answer an average rate parameter used to
allow traffic greater than the committed information rate to traverse and may deliver it
when the network is not congested
CIR (committed information rate) - correct answer used to guarantee the bandwidth
the network must deliver
EBS (excess burst size) - correct answer the burstable size allowed when the traffic is
in the EIR mode
broadcast domain - correct answer a portion of a network in which any broadcast sent
out on the network are seen by all hosts
flat network - correct answer a network where the LANs share the same broadcast
domain
layer 3 network (routed network) - correct answer uses layer 3 addressing for selecting
routes to forward data packets
default gateway address - correct answer The IP address of the networking device
used to forward data that needs to exit the LAN
next hop address - correct answer The IP address of the next networking device that
can be used to forward the data packet to its destination
physical layer - correct answer layer 1 of the OSI model, which provides the electrical
and mechanical connection to the network
,data link layer - correct answer layer 2 of the OSI model, which handles error recover,
flow control (synchronization), and sequencing
network layer - correct answer layer 3 of the OSI model, which accepts outgoing
messages and combines messages or segments into packets, adding a header that
includes routing information
transport layer - correct answer layer 4 of the OSI model, which is concerned with
message integrity between source and destination
session layer - correct answer layer 5 of the OSI model, which provides the control
functions necessary to establish, manage, and terminate the connections
presentation layer - correct answer layer 6 of the OSI model, which accepts and
structures the messages for the application
application layer - correct answer layer 7 of the OSI model, which interacts with
application programs that incorporate a communication component such as your
internet browser and email
star topology - correct answer the most common networking topology in today's LANs,
where all networking devices connect to a central switch or hub; includes twisted-pair
cables with modular plugs which are used to connect the computers and other
networking devices
bus topology - correct answer a system in which the computers share the media;
includes coaxial cable which is looped through each networking device to facilitate data
transfer
mesh topology - correct answer connects all networking devices directly to each other
which provides full redundancy in the network paths
, LAN (local area network) - correct answer network of users that share computer
resources in a limited area
topology - correct answer architecture of a network
token ring topology - correct answer a network topology configured in a logical ring that
complements the token passing protocol
IEEE (Institute of Electrical and Electronics Engineers) - correct answer one of the
major standards-setting bodies for technological development
deterministic - correct answer a type of network in which access to the network is
provided at fixed time intervals
token ring hub - correct answer a hub that manages the passing of the token in a token
ring network
hub (multiport repeater) - correct answer device that broadcasts the data it receives to
all devices connected to its ports
broadcast - correct answer transmission of data by a hub to all devices connected to
its ports
switch - correct answer establishes a direct connection from the sender to the
destination; a device that forwards a frame it receives directly out of the port associated
with its destination address
ports - correct answer the physical input/output interfaces to networking hardware
OSI Model (Open Systems Interconnection) - correct answer a seven-layer model that
describes network functions
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