NCTI 3-4 Exam Questions and Answers with
Verified Solutions | Latest Updated 2026
The Open Systems It builds a flat network model with
Interconnection unroutable
Reference Model (OSI/RM) Data physical addresses.
Link
Layer serves which primary
purpose?
The Open Systems It provides the user interface to the
Interconnection system.
Reference Model (OSI/RM)
Application Layer serves which
primary purpose?
The Open Systems It transmits data in the form of bits across
Interconnection the
reference model (OSI/RM) physical medium.
Physical
Layer serves which primary
purpose?
Which is the primary purpose of It defines the format in which Application
the Layer
Open Systems Interconnection information is sent across the network.
reference model (OSI/RM)
Presentation Layer?
,Which of the following is the It defines well known logical port
primary addresses for
purpose of the Open Systems communications between applications.
Interconnection Reference Model
(OSI/RM) Transport Layer?
The Open Systems It uses Layer 3 (Network Layer) addresses
Interconnection to create
Reference Model (OSI/RM) multiple routed networks.
Network
Layer serves which primary
purpose?
Which is the primary purpose of It establishes, manages, and terminates
the dialogs
Open Systems Interconnection between Presentation Layer entities.
reference model (OSI/RM)
Session
Layer?
The TCP/IP model Network Physical and Data Link Layers
Interface
Layer maps to which Open
Systems
Interconnection reference model
(OSI/RM) layer(s)?
, Which of the following best The Transport Layer breaks the data
describes an email message's stream into
communication flow through the pieces, which it passes to the Internetwork
TCP/IP model layers? Layer.
The Internetwork Layer adds the source
and
destination Internet protocol (IP)
addresses and
forwards the packets to the Network
Interface
Layer. The Network Interface Layer builds
frames,
and converts them to bits for transport
across the
physical network.
Which TCP/IP Internetwork Layer Internet Control Message Protocol (ICMP).
provides troubleshooting utilities,
such as ping and traceroute?
The TCP/IP model Application Application Layer.
Layer Session Layer.
maps to which three Open Presentation Layer.
Systems
Interconnection reference model
(OSI/RM) layers?
Telnet is a protocol in which Application Layer
TCP/IP
layer?
Verified Solutions | Latest Updated 2026
The Open Systems It builds a flat network model with
Interconnection unroutable
Reference Model (OSI/RM) Data physical addresses.
Link
Layer serves which primary
purpose?
The Open Systems It provides the user interface to the
Interconnection system.
Reference Model (OSI/RM)
Application Layer serves which
primary purpose?
The Open Systems It transmits data in the form of bits across
Interconnection the
reference model (OSI/RM) physical medium.
Physical
Layer serves which primary
purpose?
Which is the primary purpose of It defines the format in which Application
the Layer
Open Systems Interconnection information is sent across the network.
reference model (OSI/RM)
Presentation Layer?
,Which of the following is the It defines well known logical port
primary addresses for
purpose of the Open Systems communications between applications.
Interconnection Reference Model
(OSI/RM) Transport Layer?
The Open Systems It uses Layer 3 (Network Layer) addresses
Interconnection to create
Reference Model (OSI/RM) multiple routed networks.
Network
Layer serves which primary
purpose?
Which is the primary purpose of It establishes, manages, and terminates
the dialogs
Open Systems Interconnection between Presentation Layer entities.
reference model (OSI/RM)
Session
Layer?
The TCP/IP model Network Physical and Data Link Layers
Interface
Layer maps to which Open
Systems
Interconnection reference model
(OSI/RM) layer(s)?
, Which of the following best The Transport Layer breaks the data
describes an email message's stream into
communication flow through the pieces, which it passes to the Internetwork
TCP/IP model layers? Layer.
The Internetwork Layer adds the source
and
destination Internet protocol (IP)
addresses and
forwards the packets to the Network
Interface
Layer. The Network Interface Layer builds
frames,
and converts them to bits for transport
across the
physical network.
Which TCP/IP Internetwork Layer Internet Control Message Protocol (ICMP).
provides troubleshooting utilities,
such as ping and traceroute?
The TCP/IP model Application Application Layer.
Layer Session Layer.
maps to which three Open Presentation Layer.
Systems
Interconnection reference model
(OSI/RM) layers?
Telnet is a protocol in which Application Layer
TCP/IP
layer?
