NCTI 3 to 4 question and answers rated
A+ 2023
The Open Systems Interconnection reference model (OSI/RM) Network Layer serves which primary
purpose? - correct 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 answer Class A
What happens to a datagram sent by a higher level protocol to a 127.x.y.z address? - correct 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? - correct 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 network information can be determined from a logical Internet protocol (IP) address? - correct
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)? - correct 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? -
correct answer The Transport Layer.
All computers running on the transmission control protocol/Internet protocol (TCP/IP) suite have which
of the following in common? - correct answer Each computer is assigned its own Internet protocol (IP)
address.
, A repeater operates at which layer of the Open Systems Interconnection reference model (OSI/RM)? -
correct answer The Physical Layer.
Which one of the following protocols allows email clients to download their messages from an email
server? - correct 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?
- correct answer A daemon.
What are the primary requirements to connect to a transmission control protocol/Internet protocol
(TCP/IP) network? - correct answer Unique pairs of Network Layer and Transport Layer addresses and
use of the TCP/IP protocol suite.
What type of delivery method uses an email server between the sender and the receiver of messages? -
correct answer Store-and-forward.
Host names and uniform resource locators (URL) are resolved to Internet protocol (IP) addresses by
which of the following applications? - correct answer Domain Name System (DNS).
What happens when the browser application finishes downloading the files necessary to display a web
page? - correct answer The browser and server drop the connections, and the browser maintains the
page and its elements in local memory.
Which email protocol enables the messages to be viewed without first downloading them from the
email server? - correct answer Internet Message Access Protocol version 4 (IMAP4).
What type of server maintains an access log to assist with troubleshooting and tracking down malicious
users? - correct answer A file transfer protocol (FTP) server.
A store-and-forward email system will not deliver messages until: - correct answer The host requests the
information.
A+ 2023
The Open Systems Interconnection reference model (OSI/RM) Network Layer serves which primary
purpose? - correct 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 answer Class A
What happens to a datagram sent by a higher level protocol to a 127.x.y.z address? - correct 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? - correct 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 network information can be determined from a logical Internet protocol (IP) address? - correct
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)? - correct 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? -
correct answer The Transport Layer.
All computers running on the transmission control protocol/Internet protocol (TCP/IP) suite have which
of the following in common? - correct answer Each computer is assigned its own Internet protocol (IP)
address.
, A repeater operates at which layer of the Open Systems Interconnection reference model (OSI/RM)? -
correct answer The Physical Layer.
Which one of the following protocols allows email clients to download their messages from an email
server? - correct 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?
- correct answer A daemon.
What are the primary requirements to connect to a transmission control protocol/Internet protocol
(TCP/IP) network? - correct answer Unique pairs of Network Layer and Transport Layer addresses and
use of the TCP/IP protocol suite.
What type of delivery method uses an email server between the sender and the receiver of messages? -
correct answer Store-and-forward.
Host names and uniform resource locators (URL) are resolved to Internet protocol (IP) addresses by
which of the following applications? - correct answer Domain Name System (DNS).
What happens when the browser application finishes downloading the files necessary to display a web
page? - correct answer The browser and server drop the connections, and the browser maintains the
page and its elements in local memory.
Which email protocol enables the messages to be viewed without first downloading them from the
email server? - correct answer Internet Message Access Protocol version 4 (IMAP4).
What type of server maintains an access log to assist with troubleshooting and tracking down malicious
users? - correct answer A file transfer protocol (FTP) server.
A store-and-forward email system will not deliver messages until: - correct answer The host requests the
information.
