OSI and TCP/IP Model

Question 1

In the OSI model, what is the primary function of the network layer?

– Allows applications to establish, use, and end a connection
– Ensures that packets are delivered with no loss or Duplication
– Routers messages between networks
– Transmit data frames

Answer 1

– Routers messages between networks

Question 2

You are an application developer and a writing a program to exchange video files through a TCP/IP network. You need to select a transport protocol that will guarantee delivery.

Which TCP/IP protocol when you implement that provide this capability?

FTP
TCP
TFTP
UDP
RIP
IP

Answer 2

TCP - transmission control protocol

Question 3

What is the basic purpose of the OSI physical layer?

– Coordinates rules for managing network servers
– Coordinates rules for routing packets
– Coordinates rules for transmitting bits
– Defines basic physical structures such as disks

Answer 3

– Coordinates rules for transmitting bits

Question 4

Which two of the following are included as a part of the data link layer specifications? Select two.

– Synchronizing individual bits as they are transmitted through the network
– Composition of electrical signals as they pass through the transmission medium
– Identifying physical network devices
– Controlling how messages are propagated through the network

Answer 4

– Identifying physical network devices

– Controlling how messages are propagated through the network

Question 5

Which of the following are functions of the Mac sublayer? Select two.

– Creating routing tables based on Mac addresses
– Defining a unique hardware address for each device on network
– Letting devices on the network have access to the LAN
– Mapping hardware addresses to the link layer addresses

Answer 5

– Defining a unique hardware address for each device on network
– Letting devices on the network have access to the LAN

Question 6

In the OSI model, which of the following functions are performed at the presentation layer? Select two.

– Specified data format such as file formats
– Maintain separate client connections
–Transmit data frames
– Encrypt and compressed data
– Provide network services
– Handle general network access, flow control, and error recovery

Answer 6

– Specified data format such as file formats

– Encrypt and compressed data

Question 7

Which of the following tasks is associated with the session layer?

– Host ID number assignment
–Connection establishment
– Acknowledgment coordination
– Transmission synchronization

Answer 7

–Connection establishment

Question 8

The you’d UDP transport protocol provides which of the following features? Select two.

– Guaranteed delivery
–sequence numbers and acknowledgments
– Connections diagram service
– Low overhead

Answer 8

– Connections diagram service

– Low overhead

Question 9

Which of the following protocols includes extensive error checking to ensure that a transmission is sent and received without mistakes?

UDB
UDP
TCP
UCP

Answer 9

TCP

Question 10

The data link layer of the OSI model is comprised of two sub layers. What are they? Select two.

LAT
DLC
MAC
LLC
SAN

Answer 10

MAC - media access control

LLC - logical link control

Question 11

Which three of the following functions are performed by the OSI transport layer? Select three.

–Consistent data formatting between dissimilar systems
– End to End flow control
– Reliable message delivery
–format packets for delivery through the media
– Data segmentation and reassembly
– Path identification and selection
– Control media access, logical topology, and device identification

Answer 11

– End to End flow control
– Reliable message delivery
– Data segmentation and reassembly

Question 12

Which of the following functions are performed at the physical layer of the OSI model?

– Data translation
–enablement of network services
– Conversation identification
– Provision of an environment in which to run network applications
– Movement of data across network cables

Answer 12

– Movement of data across network cables

Question 13

Which OSI model there is responsible for guaranteeing reliable message delivery?

– Transport
– Datalink
– Application
– session

Answer 13

– Transport

Question 14

In the OSI model, which of the following functions are performed at the application layer? Select two.

– Data translation
– Enabling communication between network clients and services
– Integration of network functionality into the host operating system
– Conversation identification

Answer 14

– Enabling communication between network clients and services
– Integration of network functionality into the host operating system