COMPTIA NETWORK+ N10-008 300
VERIFIED QUESTIONS WITH
ACTUAL ANSWERS (DETAILED
ANSWERS) ALREADY VERIFIED BY
EXPERTS 2025 UPDATED NEW!!!
Represents an alias for a host - CORRECT ANSWER>>>>Cananonical Name
CNAME
Identifies authoritative DNS name servers for the zone - CORRECT ANSWER>>>>Name
Server
NS
Identifies an email server for the domain - CORRECT ANSWER>>>>Mail Excahnger
MX
Identifies the primary DNS name server that is authoritative for the zone and resolves names -
CORRECT ANSWER>>>>Start of Authority
SoA
Resolves a host name to an IPv4 address - CORRECT ANSWER>>>>Address IPv4
A
Resolves a host name to an IPv6 address - CORRECT ANSWER>>>>Address IPv6
AAAA
Identifies a record that is providing a network service or protocol - CORRECT
ANSWER>>>>Service
SRV
Resolves an IP address to a host name in reverse lookup zones - CORRECT
ANSWER>>>>Pointer
PTR
Stores any free form text that may be needed to support other network services - CORRECT
ANSWER>>>>Text
TXT
Physical Layer (layer 1) - CORRECT ANSWER>>>>transmits and receives bits from one node
to another node.
Layer 1 devices include transceivers, repeaters, hubs, media converters, and modems
,The Data Link layer (layer 2) - CORRECT ANSWER>>>>transfers data between nodes on the
same logical segment.
Layer 2 devices include network adapters or network interface cards (NICs), bridges, switches,
and wireless access points (APs)
The Network layer (layer 3) - CORRECT ANSWER>>>>moves data around a network of
networks, known as an internetwork or the internet.
The main device working at layer 3 is the router, as well as basic firewalls and layer 3 switches,
which combine the function of switches and routers. Multilayer switches work at multiple layers,
as their name suggests, but in the example, the network layer states it covers only the routing of
data around an internetwork.
The multilayer switch would not go here as it provides more than just routing.
The Transport Layer (layer 4) - CORRECT ANSWER>>>>ensures reliable data delivery, should
the application require it. It also identifies each type of network application by assigning it a port
number.
Multilayer switches, usually working as load balancers, operate at the transport layer, as well as
many types of security applicates such as advanced firewalls and intrusion detection systems
(IDSs). These devices also operate at higher layers of the OSI model.
The Session Layer (Layer 5) - CORRECT ANSWER>>>>represents the dialog control functions
that administer the process of establishing the dialog, managing data transfer, and then ending (or
tearing down) the session.
The Presentation layer (layer 6) - CORRECT ANSWER>>>>transforms data between the format
required for the network and the format required for the application
The application layer (layer 7) - CORRECT ANSWER>>>>provides an interface for software
programs on network hosts that have established a communications channel through the lower-
level protocols to exchange date.
An engineer uses a type of network adapter to connect a fiber link to a router. The transceiver fits
into an optical interface on a layer 3 Ethernet router. Of the choices, which layer 1
implementation does the engineer utilize? - CORRECT ANSWER>>>>Media converter
(Media converters are layer 1 devices and are used to convert one cable type to another. These
components alter the characteristics of one type of cable to match those of another.)
A systems administrator is setting up a static IP for a new server with a Class A IP scheme.
Which netmask lines up with a class A address? - CORRECT ANSWER>>>>/8
(The first octet for Class A falls from 1 - 126 and the netmask is 255.0.0.0 (/8). Class A network
addresses support large numbers of hosts—over 16 million. However, there are only 126 Class A
network addresses.)
,A security admin is auditing a newly deployed web server on the local network. After gaining
knowledge of the server's (Internet Protocol) IP address, the admin runs the nmap utility. Which
of the following objectives is the admin most likely to achieve when applying this utility? (Select
all that apply.)
Scan for MX records.
Scan for unnecesary services.
Scan for open ports.
Scan for domain information. - CORRECT ANSWER>>>>Scan for open ports.
(The nmap utility is a versatile port scanner used for topology, host, service, and OS (Operating
System) discovery and enumeration. Open ports are vulnerable to attacks and should be shut
down if not used.)
Scan for unnecesary services.
(Unnecessary services are also considered a security risk. Multiple applications can run over the
same port. Use the nmap utility to determine which services are running on each port and
identify which should remain active.)
A large university campus experiences communication problems between two buildings over a
fiber connection. A cabling engineer uses a optical time domain reflectometer to troubleshoot the
problem. For which purpose does the engineer use this piece of equipment? - CORRECT
ANSWER>>>>Location of a line break
(An optical time domain reflectometer transmits light-based signals of different wavelengths
over fiber to find the distance of a line break.)
A systems administrator is planning a change to a resource record. Which value should they
modify prior to the change in order to speed up caching replacement? - CORRECT
ANSWER>>>>TTL
(Each resource record can be configured with a default time to live (TTL) value, measured in
seconds. If there is a change to a resource record, server and client caching means that the
updated record can be relatively slow to propagate.)
A network admin is working with a beta application at an office workstation and is unsure if the
app is connecting properly to the internal web server. The ipconfig utility shows the workstation
has a valid Internet Protocol (IP) address and a default gateway. Determine which command-line
tool the admin can apply in this situation to show active connections and execute further
troubleshooting actions. - CORRECT ANSWER>>>>The netstat command
(The netstat command allows an admin to check the state of ports on the local host and check for
service misconfigurations. This can help identify if the application is connecting to the correct
web server on the correct port. It will also list all active connections.)
, A network technician is comparing types of VPN configurations. One VPN configuration will
route all traffic via the VPN gateway and another VPN configuration only routes the private
network traffic via the VPN gateway. What is the network technician comparing? - CORRECT
ANSWER>>>>Split tunnel vs. full tunnel
(Split tunnel VPNs only route private network traffic through the VPN gateway. Full tunnel
VPNs route all network traffic via the VPN gateway.)
Users report that one of the access points seems not to be working properly. When they go to
download files, it takes forever. The sysadmin noticed that the access point is pretty old and
should be replaced with a more powerful one. What issue would replacing the access point help
to fix? - CORRECT ANSWER>>>>Speed
(Speed is important to a wireless network, but that may only be a symptom of the issue. Distance
would be the cause of the speed issue.)
An Active Directory administrator is trying to identify the primary authoritative name server.
What can they check to find this? - CORRECT ANSWER>>>>SOA
(The Start of Authority (SOA) record identifies the primary authoritative name server that
maintains complete resource records for the zone.)
A company uses an ad-hoc topology where the wireless adapter allows connections to and from
other devices. What is the name of this ad-hoc topology? - CORRECT
ANSWER>>>>Independent Basic Service Set (Ad-Hoc)
(In an ad hoc topology, the wireless adapter allows connections to and from other devices. In
802.11 documentation, this is called an Independent Basic Service Set (IBSS).)
A network technician is looking at various administrative distances to see which route would be
selected first. Which of the following would have the lowest administrative distance? -
CORRECT ANSWER>>>>BGP
(BGP has an administrative distance of 20. An administrative distance (AD) value can express
the relative trustworthiness of the protocol supplying the route.)
A network technician is conducting maintenance on the bonded cabled links to a single logical
channel. What can be used to auto-negotiate the bonded link between the switch ports and the
end system, detect configuration errors, and recover from the failure of one of the physical links?
- CORRECT ANSWER>>>>LACP
(Link Aggregation Control Protocol (LACP), which can be used to auto-negotiate the bonded
link between the switch ports and the end system, detects configuration errors and recovers from
the failure of one of the physical links.)
VERIFIED QUESTIONS WITH
ACTUAL ANSWERS (DETAILED
ANSWERS) ALREADY VERIFIED BY
EXPERTS 2025 UPDATED NEW!!!
Represents an alias for a host - CORRECT ANSWER>>>>Cananonical Name
CNAME
Identifies authoritative DNS name servers for the zone - CORRECT ANSWER>>>>Name
Server
NS
Identifies an email server for the domain - CORRECT ANSWER>>>>Mail Excahnger
MX
Identifies the primary DNS name server that is authoritative for the zone and resolves names -
CORRECT ANSWER>>>>Start of Authority
SoA
Resolves a host name to an IPv4 address - CORRECT ANSWER>>>>Address IPv4
A
Resolves a host name to an IPv6 address - CORRECT ANSWER>>>>Address IPv6
AAAA
Identifies a record that is providing a network service or protocol - CORRECT
ANSWER>>>>Service
SRV
Resolves an IP address to a host name in reverse lookup zones - CORRECT
ANSWER>>>>Pointer
PTR
Stores any free form text that may be needed to support other network services - CORRECT
ANSWER>>>>Text
TXT
Physical Layer (layer 1) - CORRECT ANSWER>>>>transmits and receives bits from one node
to another node.
Layer 1 devices include transceivers, repeaters, hubs, media converters, and modems
,The Data Link layer (layer 2) - CORRECT ANSWER>>>>transfers data between nodes on the
same logical segment.
Layer 2 devices include network adapters or network interface cards (NICs), bridges, switches,
and wireless access points (APs)
The Network layer (layer 3) - CORRECT ANSWER>>>>moves data around a network of
networks, known as an internetwork or the internet.
The main device working at layer 3 is the router, as well as basic firewalls and layer 3 switches,
which combine the function of switches and routers. Multilayer switches work at multiple layers,
as their name suggests, but in the example, the network layer states it covers only the routing of
data around an internetwork.
The multilayer switch would not go here as it provides more than just routing.
The Transport Layer (layer 4) - CORRECT ANSWER>>>>ensures reliable data delivery, should
the application require it. It also identifies each type of network application by assigning it a port
number.
Multilayer switches, usually working as load balancers, operate at the transport layer, as well as
many types of security applicates such as advanced firewalls and intrusion detection systems
(IDSs). These devices also operate at higher layers of the OSI model.
The Session Layer (Layer 5) - CORRECT ANSWER>>>>represents the dialog control functions
that administer the process of establishing the dialog, managing data transfer, and then ending (or
tearing down) the session.
The Presentation layer (layer 6) - CORRECT ANSWER>>>>transforms data between the format
required for the network and the format required for the application
The application layer (layer 7) - CORRECT ANSWER>>>>provides an interface for software
programs on network hosts that have established a communications channel through the lower-
level protocols to exchange date.
An engineer uses a type of network adapter to connect a fiber link to a router. The transceiver fits
into an optical interface on a layer 3 Ethernet router. Of the choices, which layer 1
implementation does the engineer utilize? - CORRECT ANSWER>>>>Media converter
(Media converters are layer 1 devices and are used to convert one cable type to another. These
components alter the characteristics of one type of cable to match those of another.)
A systems administrator is setting up a static IP for a new server with a Class A IP scheme.
Which netmask lines up with a class A address? - CORRECT ANSWER>>>>/8
(The first octet for Class A falls from 1 - 126 and the netmask is 255.0.0.0 (/8). Class A network
addresses support large numbers of hosts—over 16 million. However, there are only 126 Class A
network addresses.)
,A security admin is auditing a newly deployed web server on the local network. After gaining
knowledge of the server's (Internet Protocol) IP address, the admin runs the nmap utility. Which
of the following objectives is the admin most likely to achieve when applying this utility? (Select
all that apply.)
Scan for MX records.
Scan for unnecesary services.
Scan for open ports.
Scan for domain information. - CORRECT ANSWER>>>>Scan for open ports.
(The nmap utility is a versatile port scanner used for topology, host, service, and OS (Operating
System) discovery and enumeration. Open ports are vulnerable to attacks and should be shut
down if not used.)
Scan for unnecesary services.
(Unnecessary services are also considered a security risk. Multiple applications can run over the
same port. Use the nmap utility to determine which services are running on each port and
identify which should remain active.)
A large university campus experiences communication problems between two buildings over a
fiber connection. A cabling engineer uses a optical time domain reflectometer to troubleshoot the
problem. For which purpose does the engineer use this piece of equipment? - CORRECT
ANSWER>>>>Location of a line break
(An optical time domain reflectometer transmits light-based signals of different wavelengths
over fiber to find the distance of a line break.)
A systems administrator is planning a change to a resource record. Which value should they
modify prior to the change in order to speed up caching replacement? - CORRECT
ANSWER>>>>TTL
(Each resource record can be configured with a default time to live (TTL) value, measured in
seconds. If there is a change to a resource record, server and client caching means that the
updated record can be relatively slow to propagate.)
A network admin is working with a beta application at an office workstation and is unsure if the
app is connecting properly to the internal web server. The ipconfig utility shows the workstation
has a valid Internet Protocol (IP) address and a default gateway. Determine which command-line
tool the admin can apply in this situation to show active connections and execute further
troubleshooting actions. - CORRECT ANSWER>>>>The netstat command
(The netstat command allows an admin to check the state of ports on the local host and check for
service misconfigurations. This can help identify if the application is connecting to the correct
web server on the correct port. It will also list all active connections.)
, A network technician is comparing types of VPN configurations. One VPN configuration will
route all traffic via the VPN gateway and another VPN configuration only routes the private
network traffic via the VPN gateway. What is the network technician comparing? - CORRECT
ANSWER>>>>Split tunnel vs. full tunnel
(Split tunnel VPNs only route private network traffic through the VPN gateway. Full tunnel
VPNs route all network traffic via the VPN gateway.)
Users report that one of the access points seems not to be working properly. When they go to
download files, it takes forever. The sysadmin noticed that the access point is pretty old and
should be replaced with a more powerful one. What issue would replacing the access point help
to fix? - CORRECT ANSWER>>>>Speed
(Speed is important to a wireless network, but that may only be a symptom of the issue. Distance
would be the cause of the speed issue.)
An Active Directory administrator is trying to identify the primary authoritative name server.
What can they check to find this? - CORRECT ANSWER>>>>SOA
(The Start of Authority (SOA) record identifies the primary authoritative name server that
maintains complete resource records for the zone.)
A company uses an ad-hoc topology where the wireless adapter allows connections to and from
other devices. What is the name of this ad-hoc topology? - CORRECT
ANSWER>>>>Independent Basic Service Set (Ad-Hoc)
(In an ad hoc topology, the wireless adapter allows connections to and from other devices. In
802.11 documentation, this is called an Independent Basic Service Set (IBSS).)
A network technician is looking at various administrative distances to see which route would be
selected first. Which of the following would have the lowest administrative distance? -
CORRECT ANSWER>>>>BGP
(BGP has an administrative distance of 20. An administrative distance (AD) value can express
the relative trustworthiness of the protocol supplying the route.)
A network technician is conducting maintenance on the bonded cabled links to a single logical
channel. What can be used to auto-negotiate the bonded link between the switch ports and the
end system, detect configuration errors, and recover from the failure of one of the physical links?
- CORRECT ANSWER>>>>LACP
(Link Aggregation Control Protocol (LACP), which can be used to auto-negotiate the bonded
link between the switch ports and the end system, detects configuration errors and recovers from
the failure of one of the physical links.)
