TCP(IP) AND OSI MODELS (WGU D315) EXAM
QUESTIONS & DETAILED COMPLETE ANSWERS
1. Application Responsible for the communication protocols between nodes. The
Layer (TCP/IP) protocols in this layer include hypertext transfer protocol (HTTP and
HTTPS), Secure Shell (SSH), and network time protocol (NTP),
among many others.
2. Transport
Layer (TCP/IP) Responsible for the end-to-end transport of data. The protocols that
live in this layer are transmission control protocol (TCP) and user
datagram protocol (UDP).
3. Network
Layer This layer defines the logical transmission protocols for the whole
(TCP/IP) network. The main protocols that live in this layer are internet
protocol (IP), internet control message protocol (ICMP), and address
resolution protocol (ARP).
4. Network
Interface Layer This layer establishes how data should be physically sent through the
(TCP/IP) network.
5. Physical Layer (OSI) Responsible for the physical connections of the devices in the
network. This
layer is implemented through the use of devices such as hubs,
repeaters, modem devices, and physical cabling. unit = bits
6. Data Link Layer (OSI) Responsible for the error-free delivery of data to the receiving
device or node.
This layer is implemented through the use of devices such as
switches and bridge devices, as well as anything with a network
interface, like wireless or wired network cards. unit = packets
7. Network Layer (OSI) Responsible for the transmission of data between hosts in
different networks
as well as routing of data packets. This layer is implemented
through the use of devices such as routers and some switches. unit
= frames
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, TCP(IP) AND OSI MODELS (WGU D315) EXAM
QUESTIONS & DETAILED COMPLETE ANSWERS
8. Transport Provides services to the application layer and receives services from
Layer (OSI) the net- work layer. Responsible for the reliable delivery of data.
It segments and reassembles data in the correct order for it to be
sent to the receiving device. It may also handle the reliable delivery
of data and any retries of data that are lost or corrupted. Heart of
the OSI model.
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QUESTIONS & DETAILED COMPLETE ANSWERS
1. Application Responsible for the communication protocols between nodes. The
Layer (TCP/IP) protocols in this layer include hypertext transfer protocol (HTTP and
HTTPS), Secure Shell (SSH), and network time protocol (NTP),
among many others.
2. Transport
Layer (TCP/IP) Responsible for the end-to-end transport of data. The protocols that
live in this layer are transmission control protocol (TCP) and user
datagram protocol (UDP).
3. Network
Layer This layer defines the logical transmission protocols for the whole
(TCP/IP) network. The main protocols that live in this layer are internet
protocol (IP), internet control message protocol (ICMP), and address
resolution protocol (ARP).
4. Network
Interface Layer This layer establishes how data should be physically sent through the
(TCP/IP) network.
5. Physical Layer (OSI) Responsible for the physical connections of the devices in the
network. This
layer is implemented through the use of devices such as hubs,
repeaters, modem devices, and physical cabling. unit = bits
6. Data Link Layer (OSI) Responsible for the error-free delivery of data to the receiving
device or node.
This layer is implemented through the use of devices such as
switches and bridge devices, as well as anything with a network
interface, like wireless or wired network cards. unit = packets
7. Network Layer (OSI) Responsible for the transmission of data between hosts in
different networks
as well as routing of data packets. This layer is implemented
through the use of devices such as routers and some switches. unit
= frames
1/
7
, TCP(IP) AND OSI MODELS (WGU D315) EXAM
QUESTIONS & DETAILED COMPLETE ANSWERS
8. Transport Provides services to the application layer and receives services from
Layer (OSI) the net- work layer. Responsible for the reliable delivery of data.
It segments and reassembles data in the correct order for it to be
sent to the receiving device. It may also handle the reliable delivery
of data and any retries of data that are lost or corrupted. Heart of
the OSI model.
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