D481 SECURITY FOUNDATIONS EXAM QUESTIONS WITH
COMPLETE SOLUTIONS VERIFIED BY EXPERT
What are the layers of the OSI model?
7. Application
6. Presentation
5. Session
4. Transport
3. Network
2. Data Link
1. Physical
What are the layers of the TCP/IP Reference Model?
Application
Transport
Internet or Network
Network Access or Physical
What is the difference between the OSI and TCP/IP models?
OSI = prescriptive model; shows how to develop a network software
TCP = descriptive model; explains how the internet protocol suite operates
What is a circuit-switched network?
o creates a path b/n the source and destination devices; uses the same path throughout
the conversation
o occurs at the physical layer and retains message order since both devices own the
circuit
o supports real time communication w/o delays
, o transmits complete messages
What is a packet-switched network?
o transmits messages as individual packets; takes multiple different paths to the
destination
o drawbacks -- transmission delay and latency
What is TCP?
o Transmission Control Protocol; operates at OSI Layer 4 (Transport)
o TCP *VERIFIES packets are sent and received
What is UDP?
o User Datagram Protocol
sends packets without verifying or checking for errors.
What is IP?
Internet Protocol; operates at OSI Layer 3 (Network)
o handles routing decisions to get packets from their source to destination
o enables unified communications (convergence of voice, video, & data apps)
What protocols commonly operate in the Transport Layer (OSI Layer 4)?
o Transmission Control Protocol (TCP)
o User Datagram Protocol (UDP)
o AppleTalk Transaction Protocol (ATP)
o Stream Control Transmission Protocol (SCTP)
o NetBIOS Frames Protocol (NFP)
o Fibre Channel Protocol (FCP)
What is the difference b/n a private and public IP?
o private: identifies nodes w/n an organization
o public: identifies nodes on the global internet
What are two ways to consider a network topology?
COMPLETE SOLUTIONS VERIFIED BY EXPERT
What are the layers of the OSI model?
7. Application
6. Presentation
5. Session
4. Transport
3. Network
2. Data Link
1. Physical
What are the layers of the TCP/IP Reference Model?
Application
Transport
Internet or Network
Network Access or Physical
What is the difference between the OSI and TCP/IP models?
OSI = prescriptive model; shows how to develop a network software
TCP = descriptive model; explains how the internet protocol suite operates
What is a circuit-switched network?
o creates a path b/n the source and destination devices; uses the same path throughout
the conversation
o occurs at the physical layer and retains message order since both devices own the
circuit
o supports real time communication w/o delays
, o transmits complete messages
What is a packet-switched network?
o transmits messages as individual packets; takes multiple different paths to the
destination
o drawbacks -- transmission delay and latency
What is TCP?
o Transmission Control Protocol; operates at OSI Layer 4 (Transport)
o TCP *VERIFIES packets are sent and received
What is UDP?
o User Datagram Protocol
sends packets without verifying or checking for errors.
What is IP?
Internet Protocol; operates at OSI Layer 3 (Network)
o handles routing decisions to get packets from their source to destination
o enables unified communications (convergence of voice, video, & data apps)
What protocols commonly operate in the Transport Layer (OSI Layer 4)?
o Transmission Control Protocol (TCP)
o User Datagram Protocol (UDP)
o AppleTalk Transaction Protocol (ATP)
o Stream Control Transmission Protocol (SCTP)
o NetBIOS Frames Protocol (NFP)
o Fibre Channel Protocol (FCP)
What is the difference b/n a private and public IP?
o private: identifies nodes w/n an organization
o public: identifies nodes on the global internet
What are two ways to consider a network topology?
