WGU D315: Network and Security
Foundations – Comprehensive Exam
Study Guide
Which OSI layer is related to the IP protocol Network 3
Which OSI layer is organizing the bits over Data Link 2 - They are in the same Frame
the physical layer between devices in the
same collision domain?
Which OSI layer is a Switch at? Data Link 2
Which OSI layer is a WAP (Wireless Access Data Link 2
Point) at?
Which OSI layer is a router at Network (3)
TCP protocol is on what OSI layer Transport (4)
OSI layer 1 Physical Layer (Cable, Hubs, Repeaters)
OSI layer 2 Data Link Layer (Frame, Switch, PPP, Ethernet)
OSI layer 3 Network Layer (Moves packets, IP)
OSI layer 4 Transport Layer (TCP, end to end connection)
OSI Layer 5 Session Layer (API, Sockets, Synch and send to port)
OSI layer 6 Presentation layer (Syntax and encryption layer, SSL, SSH, JPEG)
OSI layer 7 Application layer (end user layer, http, applications)
Network Typology point to point Two devices connect directly
Network Typology bus All devices connect to a central main line
Network Typology Ring All devices have two connections and form an endless ring
Network Typology Star All devices connect to a central point
Network Typology Tree Multiple devices connect together (on a switch) and then the
switches are connected with each other
Network Typology Mesh All devices connect directly to each other
, Network Typology Hybrid Multiple Network Typology within the network
Cloud - where do I manage the OS Iaas or Iaas
Paas?
What do I manage on Paas (2) Application and Data
Name the 3 CIA triades Integrity, Availability and Confidentiality
What is the CIA Triade Integrity? Detects alteration in storage, transit and process
What is the CIA Triade Availability? Ensure Authorized Access, Performance and Backup
Keeping unauthorized users out is not in this triade.
What is the CIA Triade Confidentiality? Protect from unauthorized access and use, protecting data
access in storage, transit and process
100m long Cat 5 cable supports speeds up 100 Mb/s
to
100m long Cat 5e cable supports speeds up 1000 Mb/s or 1 Gb/s
to
100m long Cat 6 cable supports speeds up 10 Gb/s
to
100m long Cat 6a cable supports speeds up 10 Gb/s
to
Does a firewall provide two way protection? Yes, it protects ingress and egress data
Firewall that only checks the address label Packet Filter
On what OSI level is a Packet Filter Transport (checks TCP/UDP prot numbers) and Network
operating (checks source and destination IP)
What is a circuit level gateway A firewall that conceals the true identity of the protected
network (hides IP) on the transport (4) layer
What does state in stateful mean? It refers to the connection state between two computers
Why do we need the 5th layer on a Stateful In this connection, the firewall is creating temporary rules per
Inspection session to permit communication (TCP) back to the sender.
What is a stateful inspection It reduces the amount of firewall rules. Firewall vendors
implemented a feature that only needs one rule to allow the
initial communication.
Foundations – Comprehensive Exam
Study Guide
Which OSI layer is related to the IP protocol Network 3
Which OSI layer is organizing the bits over Data Link 2 - They are in the same Frame
the physical layer between devices in the
same collision domain?
Which OSI layer is a Switch at? Data Link 2
Which OSI layer is a WAP (Wireless Access Data Link 2
Point) at?
Which OSI layer is a router at Network (3)
TCP protocol is on what OSI layer Transport (4)
OSI layer 1 Physical Layer (Cable, Hubs, Repeaters)
OSI layer 2 Data Link Layer (Frame, Switch, PPP, Ethernet)
OSI layer 3 Network Layer (Moves packets, IP)
OSI layer 4 Transport Layer (TCP, end to end connection)
OSI Layer 5 Session Layer (API, Sockets, Synch and send to port)
OSI layer 6 Presentation layer (Syntax and encryption layer, SSL, SSH, JPEG)
OSI layer 7 Application layer (end user layer, http, applications)
Network Typology point to point Two devices connect directly
Network Typology bus All devices connect to a central main line
Network Typology Ring All devices have two connections and form an endless ring
Network Typology Star All devices connect to a central point
Network Typology Tree Multiple devices connect together (on a switch) and then the
switches are connected with each other
Network Typology Mesh All devices connect directly to each other
, Network Typology Hybrid Multiple Network Typology within the network
Cloud - where do I manage the OS Iaas or Iaas
Paas?
What do I manage on Paas (2) Application and Data
Name the 3 CIA triades Integrity, Availability and Confidentiality
What is the CIA Triade Integrity? Detects alteration in storage, transit and process
What is the CIA Triade Availability? Ensure Authorized Access, Performance and Backup
Keeping unauthorized users out is not in this triade.
What is the CIA Triade Confidentiality? Protect from unauthorized access and use, protecting data
access in storage, transit and process
100m long Cat 5 cable supports speeds up 100 Mb/s
to
100m long Cat 5e cable supports speeds up 1000 Mb/s or 1 Gb/s
to
100m long Cat 6 cable supports speeds up 10 Gb/s
to
100m long Cat 6a cable supports speeds up 10 Gb/s
to
Does a firewall provide two way protection? Yes, it protects ingress and egress data
Firewall that only checks the address label Packet Filter
On what OSI level is a Packet Filter Transport (checks TCP/UDP prot numbers) and Network
operating (checks source and destination IP)
What is a circuit level gateway A firewall that conceals the true identity of the protected
network (hides IP) on the transport (4) layer
What does state in stateful mean? It refers to the connection state between two computers
Why do we need the 5th layer on a Stateful In this connection, the firewall is creating temporary rules per
Inspection session to permit communication (TCP) back to the sender.
What is a stateful inspection It reduces the amount of firewall rules. Firewall vendors
implemented a feature that only needs one rule to allow the
initial communication.
