WGU D315 COMPLETE EXAMINATION TEST
QUESTIONS WITH VERIFIED SOLUTIONS
●● OSI Layer 6
Answer: Presentation - Data representation & encryption (SSH, SSL,
IMap, FTP, JPeg)
●● OSI Layer 5
Answer: Session - Connection maintenance (API's sockets)
●● OSI Layer 4
Answer: Transport - End to end connection (TCP, UDP)
●● OSI Layer 3
Answer: Network - Logical addressing for data path using packets (IP,
ICMP, IGMP)
●● OSI Layer 2
Answer: Data Link - Physical addressing , formatting data in frames
(Switches, Bridges, Ethernet)
●● OSI Layer 1
,Answer: Physical - Physical transmission of signals, media or binary raw
bits (Coax, Fiber, Wireless)
●● TCP/IP Layer 4
Answer: Application - OSI layers 7, 6, and 5 - HTTPS, FTP, Telnet,
NTP, DHCP, Ping
●● TCP/IP Layer 3
Answer: Transport - OSI layer 4 - TCP, UDP (Port address)
●● TCP/IP Layer 2
Answer: Network - OSI layer 3 - IP, ARP, ICMP, IGMP (IP Address)
●● TCP/IP Layer 1
Answer: network Interface - OSI layer 1 &2 - Ethernet (MAC Address)
●● Hub
Answer: Layer 1 - Connection point for a wired network (Dumb
Device). Not used in IT anymore
●● Switch
Answer: Layer 2 - Primary device for inter connecting wired
components (Smart Device). Learns which MAC address live on which
, port and keeps a table of a MAC address to port assignment. Only send
data to the correct recipient.
●● Wireless Access Point
Answer: Layer 2 - Acts as a bridge, It takes all wireless clients and
bridges them to the wired network. Uses MAC addresses to make
forwarding decisions.
●● Router
Answer: Layer 3 - move data between one IP network to another
●● Modem
Answer: Layer 2 - allows your ISP to provide service to your house or
business.
●● Bridge
Answer: Layer 2 - A device that connects multiple networks or network
segments into a single network
●● Repeater
Answer: Layer 1 - A network node that amplifies incoming signals and
rebroadcast them over a wider area.
●● Cat 3
QUESTIONS WITH VERIFIED SOLUTIONS
●● OSI Layer 6
Answer: Presentation - Data representation & encryption (SSH, SSL,
IMap, FTP, JPeg)
●● OSI Layer 5
Answer: Session - Connection maintenance (API's sockets)
●● OSI Layer 4
Answer: Transport - End to end connection (TCP, UDP)
●● OSI Layer 3
Answer: Network - Logical addressing for data path using packets (IP,
ICMP, IGMP)
●● OSI Layer 2
Answer: Data Link - Physical addressing , formatting data in frames
(Switches, Bridges, Ethernet)
●● OSI Layer 1
,Answer: Physical - Physical transmission of signals, media or binary raw
bits (Coax, Fiber, Wireless)
●● TCP/IP Layer 4
Answer: Application - OSI layers 7, 6, and 5 - HTTPS, FTP, Telnet,
NTP, DHCP, Ping
●● TCP/IP Layer 3
Answer: Transport - OSI layer 4 - TCP, UDP (Port address)
●● TCP/IP Layer 2
Answer: Network - OSI layer 3 - IP, ARP, ICMP, IGMP (IP Address)
●● TCP/IP Layer 1
Answer: network Interface - OSI layer 1 &2 - Ethernet (MAC Address)
●● Hub
Answer: Layer 1 - Connection point for a wired network (Dumb
Device). Not used in IT anymore
●● Switch
Answer: Layer 2 - Primary device for inter connecting wired
components (Smart Device). Learns which MAC address live on which
, port and keeps a table of a MAC address to port assignment. Only send
data to the correct recipient.
●● Wireless Access Point
Answer: Layer 2 - Acts as a bridge, It takes all wireless clients and
bridges them to the wired network. Uses MAC addresses to make
forwarding decisions.
●● Router
Answer: Layer 3 - move data between one IP network to another
●● Modem
Answer: Layer 2 - allows your ISP to provide service to your house or
business.
●● Bridge
Answer: Layer 2 - A device that connects multiple networks or network
segments into a single network
●● Repeater
Answer: Layer 1 - A network node that amplifies incoming signals and
rebroadcast them over a wider area.
●● Cat 3
