D481 OA Terminology UPDATED ACTUAL Exam Questions and CORRECT Answers

D481 OA Terminology UPDATED ACTUAL
Exam Questions and CORRECT Answers
TCP/IP Application Layer 4 - CORRECT ANSWER - The top of the TCP/IP Reference
Model, which maps to OSI Layers 5, 6, and 7. This interacts with applications that need to gain
access to network services.


TCP/IP Transport or Host-to-Host Layer 3 - CORRECT ANSWER - Provides end-to-end
delivery, which maps to OSI Layer 4. This layer segments the data and adds a checksum to
properly validate data to ensure that it has not been corrupted.


TCP/IP Network or Internet Layer 2 - CORRECT ANSWER - Handles the routing of
packets as they move around the network. It maps to Layer 3 of the OSI model.


TCP/IP Physical or Network Access Layer 1 - CORRECT ANSWER - Resides at the
lowest layer of the TCP/IP model and is the point at which the higher-layer protocols interface
with the network transport media. When compared to the OSI model, this layer corresponds to
OSI Layer 1 and Layer 2.


OSI Application Layer 7 - CORRECT ANSWER - Responsible for interacting with end
users. This Layer includes all programs on a computer that interact with the network; for
example, your email software is included because it must transmit and receive messages over the
network. A simple game like Solitaire doesn't fit here because it does not require the network to
operate.


OSI Presentation Layer 6 - CORRECT ANSWER - This is responsible for the coding of
data. This Layer includes file formats and character representations. From a security perspective,
encryption generally takes place at this layer.


OSI Session Layer 5 - CORRECT ANSWER - This is responsible for maintaining
communication sessions between computers. This Layer creates, maintains, and disconnects
communications that take place between processes over the network.

, OSI Transport Layer 4 - CORRECT ANSWER - This is responsible for breaking data into
packets and properly transmitting them over the network. Flow control and error checking take
place here. TCP operates in this layer


OSI Network Layer 3 - CORRECT ANSWER - This is responsible for the logical
implementation of the network. One important feature of this Layer is logical addressing. In
TCP/IP networking, logical addressing takes the familiar form of IP addresses. IPs operate in this
layer.


OSI Data Link Layer 2 - CORRECT ANSWER - This is responsible for transmitting
information on computers connected to the same local area network (LAN) . The Data Link
Layer uses Media Access Control (MAC) addresses. Device manufacturers assign each hardware
device a unique MAC address.


OSI Physical Layer 1 - CORRECT ANSWER - This is responsible for the physical
operation of the network. This Layer must translate the binary ones and zeros of computer
language into the language of the transport medium. In the case of copper network cables, it must
translate computer data into electrical pulses. In the case of fiber optics, it must translate the data
into bursts of light.


OSI Application Layer Protocols - CORRECT ANSWER - BitTorrent, DNC, DSNP,
DHCP, FTP, HTTP(S), IMAP, MIME, NNTP, NTP, POP3, RADIUS, RDP, SMTP, SOAP, Telnet


OSI Application Layer Devices - CORRECT ANSWER - Gateway, firewall, endpoint
device (server, PC, mobile device, etc.)


OSI Presentation Layer Protocols - CORRECT ANSWER - AFP, SSL, TLS



OSI Presentation Layer Devices - CORRECT ANSWER - Gateway, firewall, server, PC



OSI Session Layer Protocols - CORRECT ANSWER - L2F, L2TP, NetBIOS, NFS, RPC,
SMB, SSH