WGU D325 COMPTIA NETWORK+ CRAM
SHEET EXAM SCRIPT 2026 TEST PAPER
QUESTIONS AND SOLUTIONS GRADED A+
●● OSI Layer 1 (Physical) responsibilities
Answer: Physical transmission of raw bits including cables signals and
connectors
●● OSI Layer 2 (Data Link) responsibilities
Answer: Node-to-node delivery framing MAC addressing and error
detection
●● What does the MAC sublayer do?
Answer: Controls access to the physical medium and uses MAC
addresses
●● What does the LLC sublayer do?
Answer: Provides flow control error control and allows multiple
protocols to coexist
●● OSI Layer 3 (Network) responsibilities
Answer: Logical addressing and routing between networks using IP
addresses
,●● OSI Layer 4 (Transport) responsibilities
Answer: End-to-end delivery segmentation flow control and error
correction
●● OSI Layer 5 (Session) responsibilities
Answer: Establishes manages and terminates sessions
●● OSI Layer 6 (Presentation) responsibilities
Answer: Encryption compression and data format translation
●● OSI Layer 7 (Application) responsibilities
Answer: Provides network services to end-user applications
●● Physical vs Virtual appliances
Answer: Physical are dedicated high-performance hardware while
virtual are software-based scalable and cost-effective
●● Router function
Answer: Routes traffic between networks using IP addresses
●● Layer 2 switch function
, Answer: Forwards frames using MAC addresses within a LAN or
VLAN
●● Layer 3 switch function
Answer: Performs both switching and routing between VLANs
●● Firewall purpose
Answer: Allows or blocks traffic based on security rules
●● IDS vs IPS
Answer: IDS alerts on threats while IPS actively blocks them
●● Load balancer purpose
Answer: Distributes traffic across servers to improve availability and
performance
●● Proxy server purpose
Answer: Acts as an intermediary providing caching filtering and access
control
●● NAS vs SAN
Answer: NAS provides file-level storage while SAN provides block-
level storage
SHEET EXAM SCRIPT 2026 TEST PAPER
QUESTIONS AND SOLUTIONS GRADED A+
●● OSI Layer 1 (Physical) responsibilities
Answer: Physical transmission of raw bits including cables signals and
connectors
●● OSI Layer 2 (Data Link) responsibilities
Answer: Node-to-node delivery framing MAC addressing and error
detection
●● What does the MAC sublayer do?
Answer: Controls access to the physical medium and uses MAC
addresses
●● What does the LLC sublayer do?
Answer: Provides flow control error control and allows multiple
protocols to coexist
●● OSI Layer 3 (Network) responsibilities
Answer: Logical addressing and routing between networks using IP
addresses
,●● OSI Layer 4 (Transport) responsibilities
Answer: End-to-end delivery segmentation flow control and error
correction
●● OSI Layer 5 (Session) responsibilities
Answer: Establishes manages and terminates sessions
●● OSI Layer 6 (Presentation) responsibilities
Answer: Encryption compression and data format translation
●● OSI Layer 7 (Application) responsibilities
Answer: Provides network services to end-user applications
●● Physical vs Virtual appliances
Answer: Physical are dedicated high-performance hardware while
virtual are software-based scalable and cost-effective
●● Router function
Answer: Routes traffic between networks using IP addresses
●● Layer 2 switch function
, Answer: Forwards frames using MAC addresses within a LAN or
VLAN
●● Layer 3 switch function
Answer: Performs both switching and routing between VLANs
●● Firewall purpose
Answer: Allows or blocks traffic based on security rules
●● IDS vs IPS
Answer: IDS alerts on threats while IPS actively blocks them
●● Load balancer purpose
Answer: Distributes traffic across servers to improve availability and
performance
●● Proxy server purpose
Answer: Acts as an intermediary providing caching filtering and access
control
●● NAS vs SAN
Answer: NAS provides file-level storage while SAN provides block-
level storage
