LESSON 2 - SIMULATION & MCIS
INTEROPERABILITY EXAM
QUESTIONS & ANSWERS
HOW DOES A COMPUTER NETWORK WORK?
Networks move data through gateways, routers, switches, and hubs
Wired and wireless connections
Server (deliverer) sends data to client (receiver)
Transfer occurs via:
Wide Area Network (WAN)
Local Area Network (LAN)
Example: sending a letter via post office requires senders address, addressee, shipping
method, content, and response
Networks employ firewalls for security purposes similar to process of screen packages -
Correct Answers -The OSI Seven-Layer Model (3 of 45)
outlines the various protocols pertaining to the interaction of a network.
OSI SEVEN-LAYER MODEL - PHYSICAL LAYER
Land-based layer responsible for delivering and receiving raw bit streams across
physical medium
Responsible for data encoding, physical medium attachment, and transmission via
volts, cables, and hubs
Hubs - connect various segments of LAN, replaced by switches - Correct Answers -OSI
Seven Layer Model - Data Link Layer (5 of 45)
Land-based, provides error-free delivery from one node to the other
Establishes links between nodes, media access control, and frame traffic control,
sequencing, acknowledgement, and delimiting
Two categories: Media Access Control (MAC) and Logical Link Control (LLC)
MAC - provides network access and permission to transmit data
LLC - controls all frame activity
OSI Seven-Layer Model - Network Layer (6 of 45)
Controls all subnet operations
, Provides packet sequencing, virtual circuits, and frame fragmentation
Data pathways built using routers and gateways
Routers
Used to forward data packets to other networks
Decides best path using headers and forwarding tables
Gateways - type of router, acts as access point for another server - Correct Answers -
OSI Seven-Layer Model - Transport Layer (7 of 45)
Ensures complete data transmission between hosts
Responsible for error recovery and flow control
Transmission Control Protocol (TCP)
Guaranteed connection, end-to-end connectivity, and data error checking
Uses less bandwidth with Vehicle Track Updates
User Datagram Protocol (UDP)
Best effort connection, simple transmission model, and data error checking
Uses more bandwidth with Unmanned Aerial Vehicle (UAV) videos
OSI Seven-Layer Model - Session Layer (8 of 45)
Session establishment, maintenance, and termination between processes running on
different stations
Session support offered through security checks, name recognition, and logging
Logical Ports - Remote-Procedure Call (RPC), Structured Query Language (SQL),
Network File System (NFS), and others - Correct Answers -OSI Seven-Layer Model
Presentation Layer (9 of 45)
Transforms data into acceptable format for final layer
Network translator
Encrypts and decrypts syntax layers when needed
Character code translation, data conversion, and compression used to format data
OSI Seven-Layer Model - Application Layer (10 of 45)
Window for users and application processes to access network services
Resource sharing, directory services, network management
Remote file and printer access
Application services provided for email, file transfers, and other network software
services - Correct Answers -The presentation layer in the OSI Seven-Layer Model
transforms data into an acceptable format to be received by the final layer. Which of the
following statements is the presentation layer also responsible for?
Encrypting and decrypting the syntax layer when necessary
THE CONCEPT OF INTEROPERABILITY
INTEROPERABILITY EXAM
QUESTIONS & ANSWERS
HOW DOES A COMPUTER NETWORK WORK?
Networks move data through gateways, routers, switches, and hubs
Wired and wireless connections
Server (deliverer) sends data to client (receiver)
Transfer occurs via:
Wide Area Network (WAN)
Local Area Network (LAN)
Example: sending a letter via post office requires senders address, addressee, shipping
method, content, and response
Networks employ firewalls for security purposes similar to process of screen packages -
Correct Answers -The OSI Seven-Layer Model (3 of 45)
outlines the various protocols pertaining to the interaction of a network.
OSI SEVEN-LAYER MODEL - PHYSICAL LAYER
Land-based layer responsible for delivering and receiving raw bit streams across
physical medium
Responsible for data encoding, physical medium attachment, and transmission via
volts, cables, and hubs
Hubs - connect various segments of LAN, replaced by switches - Correct Answers -OSI
Seven Layer Model - Data Link Layer (5 of 45)
Land-based, provides error-free delivery from one node to the other
Establishes links between nodes, media access control, and frame traffic control,
sequencing, acknowledgement, and delimiting
Two categories: Media Access Control (MAC) and Logical Link Control (LLC)
MAC - provides network access and permission to transmit data
LLC - controls all frame activity
OSI Seven-Layer Model - Network Layer (6 of 45)
Controls all subnet operations
, Provides packet sequencing, virtual circuits, and frame fragmentation
Data pathways built using routers and gateways
Routers
Used to forward data packets to other networks
Decides best path using headers and forwarding tables
Gateways - type of router, acts as access point for another server - Correct Answers -
OSI Seven-Layer Model - Transport Layer (7 of 45)
Ensures complete data transmission between hosts
Responsible for error recovery and flow control
Transmission Control Protocol (TCP)
Guaranteed connection, end-to-end connectivity, and data error checking
Uses less bandwidth with Vehicle Track Updates
User Datagram Protocol (UDP)
Best effort connection, simple transmission model, and data error checking
Uses more bandwidth with Unmanned Aerial Vehicle (UAV) videos
OSI Seven-Layer Model - Session Layer (8 of 45)
Session establishment, maintenance, and termination between processes running on
different stations
Session support offered through security checks, name recognition, and logging
Logical Ports - Remote-Procedure Call (RPC), Structured Query Language (SQL),
Network File System (NFS), and others - Correct Answers -OSI Seven-Layer Model
Presentation Layer (9 of 45)
Transforms data into acceptable format for final layer
Network translator
Encrypts and decrypts syntax layers when needed
Character code translation, data conversion, and compression used to format data
OSI Seven-Layer Model - Application Layer (10 of 45)
Window for users and application processes to access network services
Resource sharing, directory services, network management
Remote file and printer access
Application services provided for email, file transfers, and other network software
services - Correct Answers -The presentation layer in the OSI Seven-Layer Model
transforms data into an acceptable format to be received by the final layer. Which of the
following statements is the presentation layer also responsible for?
Encrypting and decrypting the syntax layer when necessary
THE CONCEPT OF INTEROPERABILITY
