WGU D325 NETWORKS UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
COMPREHENSIVE STUDY GUIDE
●● Physical Layer
Answer: Transmits raw bits over physical medium
●● Data Link Layer
Answer: Handles MAC addressing and frame delivery
●● Network Layer
Answer: Handles IP addressing and routing
●● Transport Layer
Answer: Provides reliable (TCP) or unreliable (UDP) delivery
●● Session Layer
Answer: Manages sessions between applications
●● Presentation Layer
Answer: Encryption, compression, formatting
, ●● Application Layer
Answer: User-facing network services
●● TCP/IP Model
Answer: 4-layer practical networking model
●● Encapsulation
Answer: Wrapping data with headers as it moves down OSI layers
●● Decapsulation
Answer: Removing headers as data moves up OSI layers
●● IPv4 Address
Answer: 32-bit address written in dotted decimal
●● IPv6 Address
Answer: 128-bit address written in hexadecimal
●● Private IP Range (Class A)
Answer: 10.0.0.0 - 10.255.255.255
QUESTIONS AND CORRECT ANSWERS
COMPREHENSIVE STUDY GUIDE
●● Physical Layer
Answer: Transmits raw bits over physical medium
●● Data Link Layer
Answer: Handles MAC addressing and frame delivery
●● Network Layer
Answer: Handles IP addressing and routing
●● Transport Layer
Answer: Provides reliable (TCP) or unreliable (UDP) delivery
●● Session Layer
Answer: Manages sessions between applications
●● Presentation Layer
Answer: Encryption, compression, formatting
, ●● Application Layer
Answer: User-facing network services
●● TCP/IP Model
Answer: 4-layer practical networking model
●● Encapsulation
Answer: Wrapping data with headers as it moves down OSI layers
●● Decapsulation
Answer: Removing headers as data moves up OSI layers
●● IPv4 Address
Answer: 32-bit address written in dotted decimal
●● IPv6 Address
Answer: 128-bit address written in hexadecimal
●● Private IP Range (Class A)
Answer: 10.0.0.0 - 10.255.255.255