NCTI 3 TO 4 EXAM
STUDY GUIDE QUESTIONS WITH CORRECT
ANSWERS 2026/2027 LATEST UPDATE
What network information can be determined from a logical Internet protocol
(IP) address? - ✔✔✔ANSWER>>>>The host portion and network portion.
The physical address of a device is processed by which layer of the Open
Systems
Interconnection reference model (OSI/RM)? - ✔✔✔ANSWER>>>>The Data
Link Layer.
Which layer of the Open Systems 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? - ✔✔✔ANSWER>>>>The
Transport Layer.
All computers running on the transmission control protocol/Internet protocol
(TCP/IP) suite have which of the following in common? -
✔✔✔ANSWER>>>>Each computer is assigned its own Internet protocol (IP)
address.
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,A repeater operates at which layer of the Open Systems Interconnection
reference model (OSI/RM)? - ✔✔✔ANSWER>>>>The Physical Layer.
Which one of the following protocols allows email clients to download their
messages from an email server? - ✔✔✔ANSWER>>>>Post Office Protocol
version 3 (POP3).
Hypertext transfer protocol (HTTP) is what type of protocol? - CORRECT
ANSWER>>>>Stateless.
On the file transfer protocol (FTP) server, what manages client requests for file
retrieval or transmission? - ✔✔✔ANSWER>>>>A daemon.
What are the primary requirements to connect to a transmission control
protocol/Internet protocol (TCP/IP) network? - ✔✔✔ANSWER>>>>Unique
pairs of Network Layer and Transport Layer addresses and use of the TCP/IP
protocol suite.
The Open Systems Interconnection reference model (OSI/RM) Network Layer
serves which primary purpose? - ✔✔✔ANSWER>>>>It uses Layer 3 addresses
to create multiple routed networks.
The address 68.56.189.17 belongs to which Internet protocol (IP) class? -
CORRECT
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, ANSWER>>>>Class A
What happens to a datagram sent by a higher level protocol to a 127.x.y.z
address? - ✔✔✔ANSWER>>>>The datagram loops back inside the host and
never leaves the network interface card (NIC).
Which device evaluates and acts upon a packet's Internet protocol (IP) address?
-
✔✔✔ANSWER>>>>Router.
The Network Layer must do what to a received frame first, in order to
determine the route over which it will forward the datagram to the next
network? - CORRECT ANSWER>>>>Decapsulate the packet.
What type of delivery method uses an email server between the sender and the
receiver of messages? - ✔✔✔ANSWER>>>>Store-and-forward.
Host names and uniform resource locators (URL) are resolved to Internet
protocol (IP) addresses by which of the following applications? -
✔✔✔ANSWER>>>>Domain Name System (DNS).
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STUDY GUIDE QUESTIONS WITH CORRECT
ANSWERS 2026/2027 LATEST UPDATE
What network information can be determined from a logical Internet protocol
(IP) address? - ✔✔✔ANSWER>>>>The host portion and network portion.
The physical address of a device is processed by which layer of the Open
Systems
Interconnection reference model (OSI/RM)? - ✔✔✔ANSWER>>>>The Data
Link Layer.
Which layer of the Open Systems 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? - ✔✔✔ANSWER>>>>The
Transport Layer.
All computers running on the transmission control protocol/Internet protocol
(TCP/IP) suite have which of the following in common? -
✔✔✔ANSWER>>>>Each computer is assigned its own Internet protocol (IP)
address.
1|Page
,A repeater operates at which layer of the Open Systems Interconnection
reference model (OSI/RM)? - ✔✔✔ANSWER>>>>The Physical Layer.
Which one of the following protocols allows email clients to download their
messages from an email server? - ✔✔✔ANSWER>>>>Post Office Protocol
version 3 (POP3).
Hypertext transfer protocol (HTTP) is what type of protocol? - CORRECT
ANSWER>>>>Stateless.
On the file transfer protocol (FTP) server, what manages client requests for file
retrieval or transmission? - ✔✔✔ANSWER>>>>A daemon.
What are the primary requirements to connect to a transmission control
protocol/Internet protocol (TCP/IP) network? - ✔✔✔ANSWER>>>>Unique
pairs of Network Layer and Transport Layer addresses and use of the TCP/IP
protocol suite.
The Open Systems Interconnection reference model (OSI/RM) Network Layer
serves which primary purpose? - ✔✔✔ANSWER>>>>It uses Layer 3 addresses
to create multiple routed networks.
The address 68.56.189.17 belongs to which Internet protocol (IP) class? -
CORRECT
2|Page
, ANSWER>>>>Class A
What happens to a datagram sent by a higher level protocol to a 127.x.y.z
address? - ✔✔✔ANSWER>>>>The datagram loops back inside the host and
never leaves the network interface card (NIC).
Which device evaluates and acts upon a packet's Internet protocol (IP) address?
-
✔✔✔ANSWER>>>>Router.
The Network Layer must do what to a received frame first, in order to
determine the route over which it will forward the datagram to the next
network? - CORRECT ANSWER>>>>Decapsulate the packet.
What type of delivery method uses an email server between the sender and the
receiver of messages? - ✔✔✔ANSWER>>>>Store-and-forward.
Host names and uniform resource locators (URL) are resolved to Internet
protocol (IP) addresses by which of the following applications? -
✔✔✔ANSWER>>>>Domain Name System (DNS).
3|Page
