NCTI Field Tech 3 to 4 Exam Questions and
Answers with Verified Solutions | Latest
Updated 2026
The Open Systems It uses Layer 3 addresses to create
Interconnection multiple routed
reference model (OSI/RM) networks.
Network
Layer serves which primary
purpose?
The address 68.56.189.17 belongs Class A
to
which Internet protocol (IP) class?
What happens to a datagram sent The datagram loops back inside the host
by and never
a higher level protocol to a leaves the network interface card (NIC).
127.x.y.z
address?
Which device evaluates and acts Router.
upon a packet's Internet protocol
(IP) address?
,The Network Layer must do what Decapsulate the packet.
to
a received frame first, in order to
determine the route over which it
will
forward the datagram to the next
network?
What network information can be The host portion and network portion.
determined from a logical Internet
protocol (IP) address?
The physical address of a device The Data Link Layer.
is
processed by which layer of the
Open Systems Interconnection
reference model (OSI/RM)?
Which layer of the Open Systems The Transport Layer.
Interconnection reference model
(OSI/RM) would you suspect as
being the problem when packets
are
arriving at the server but no
information is being returned to the
client?
All computers running on the Each computer is assigned its own Internet
transmission control protocol (IP) address.
protocol/Internet protocol (TCP/IP)
suite have which of the following in
common?
, A repeater operates at which layer The Physical Layer.
of
the Open Systems Interconnection
reference model (OSI/RM)?
Which one of the following Post Office Protocol version 3 (POP3).
protocols allows email clients to
download their messages from an
email server?
Hypertext transfer protocol (HTTP) Stateless.
is
what type of protocol?
On the file transfer protocol (FTP) A daemon.
server, what manages client
requests
for file retrieval or transmission?
What are the primary requirements Unique pairs of Network Layer and
to connect to a transmission Transport Layer
control addresses and use of the TCP/IP protocol
protocol/Internet protocol (TCP/IP) suite.
network?
What type of delivery method uses Store-and-forward.
an email server between the
sender
and the receiver of messages?
Answers with Verified Solutions | Latest
Updated 2026
The Open Systems It uses Layer 3 addresses to create
Interconnection multiple routed
reference model (OSI/RM) networks.
Network
Layer serves which primary
purpose?
The address 68.56.189.17 belongs Class A
to
which Internet protocol (IP) class?
What happens to a datagram sent The datagram loops back inside the host
by and never
a higher level protocol to a leaves the network interface card (NIC).
127.x.y.z
address?
Which device evaluates and acts Router.
upon a packet's Internet protocol
(IP) address?
,The Network Layer must do what Decapsulate the packet.
to
a received frame first, in order to
determine the route over which it
will
forward the datagram to the next
network?
What network information can be The host portion and network portion.
determined from a logical Internet
protocol (IP) address?
The physical address of a device The Data Link Layer.
is
processed by which layer of the
Open Systems Interconnection
reference model (OSI/RM)?
Which layer of the Open Systems The Transport Layer.
Interconnection reference model
(OSI/RM) would you suspect as
being the problem when packets
are
arriving at the server but no
information is being returned to the
client?
All computers running on the Each computer is assigned its own Internet
transmission control protocol (IP) address.
protocol/Internet protocol (TCP/IP)
suite have which of the following in
common?
, A repeater operates at which layer The Physical Layer.
of
the Open Systems Interconnection
reference model (OSI/RM)?
Which one of the following Post Office Protocol version 3 (POP3).
protocols allows email clients to
download their messages from an
email server?
Hypertext transfer protocol (HTTP) Stateless.
is
what type of protocol?
On the file transfer protocol (FTP) A daemon.
server, what manages client
requests
for file retrieval or transmission?
What are the primary requirements Unique pairs of Network Layer and
to connect to a transmission Transport Layer
control addresses and use of the TCP/IP protocol
protocol/Internet protocol (TCP/IP) suite.
network?
What type of delivery method uses Store-and-forward.
an email server between the
sender
and the receiver of messages?
