01 CNS

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A conceptual framework used to understand network interactions in seven distinct layers.​

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• OSI Model
• TCP/IP Model
• Network Topology
• Internet Protocol

Emily is troubleshooting a network issue and finds that the problem lies with the IP addresses assigned to devices. Which layer of the OSI model is she most likely dealing with?

• Physical Layer
• Data Link Layer
• Network Layer
• Transport Layer

Sarah is a security specialist and has been tasked with ensuring that data being transferred between two systems is encrypted. Which layer of the OSI model would she focus on?

Nathan notices that during his online gaming sessions, there seems to be an issue with establishing, maintaining, and appropriately terminating the connection with the gaming server.

Which OSI layer is most likely involved in this process?

• Presentation Layer
• Network Layer
• Session Layer

• Application Layer

Computers on a ____ are able to communicate and share resources with each other via the protocols they have in common

A ​ (a)   belongs only to its local network and manages device connections and whereas a ​ (b)   connects to two or more local networks.​

The signal being transmitted from outside an organization is an ​ (c)   signals which has to be converted into ​ (d)   signals, which is handled by the a ​ (e)   .

• switch
• router
• analog
• digital
• modem
• wireless AP
• computer
• fixer

Why do NICs do?

• Allow devices to control one another
• Allow devices to connect to a printer
• Allows devices to interface with one another
• Allow devices to connect to a network

Which of these is true about peer-to-peer networks?

• They are illegal

• Resources are not held on a central server

• They are mainly used on the 'dark web'

• They are only used with a home hub.

​ (a)   Used for sending electronic mail across mail servers.

​ (b)   Used to collect and organize information about devices that are used on a network.

​ (c)   Used to receive email from an email server.

​ (d)   Used for time-sensitive applications like streaming gaming, playing videos, or music.

​ ​ (e)   Creates a secure communication line to ensure the reliable transmission of all data.

• SMTP
• SNMP
• IMAP
• UDP
• TCP
• IP

Match the descriptions

c

d

e

f

g

h

i

Data Link

Network

Session

Physical

Application

Tracker

Presentation

Defender

Transport