WGU C172 - Network and Security Foundations – Firewalls Exam
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Course
WGU C172 - Network and Security Foundations
Institution
WGU C172 - Network And Security Foundations
WGU C172 - Network and Security Foundations – Firewalls Exam
1. Firewall A part of a computer system or network
designed to block unauthorized access
while permitting outward communication.
2. Stateful Inspection Firewall The inbound and outbound data packets
are compared to determine if a c...
WGU C172 - Network and Security Foundations – Firewalls Exam
1. Firewall A part of a computer system or network
designed to block unauthorized access
while permitting outward communication.
2. Stateful Inspection Firewall The inbound and outbound data packets
are compared to determine if a connection
should be allowed.
3. Proxy Server The client gets access to the network via
the .
This step is used to authenticate the user,
establish the session, and set policies.
4. Packet Filtering Firewall Can also limit information moving from one
segment to another.
5. Packet Filtering Firewall Explicit ports must be opened to allow in-
coming and outgoing traffic.
6. Stateful Inspection Firewall A
type of Firewall operates at OSI Layers 3
(Network), 4 (Transport), 5 (Session).
7. Firewall rules are called Ac-
cess Control Lists (ACLs).
8. Application Level Firewall The
Firewall operates at OSI Level 7 and
below.
9. Access Control Lists (ACLs) allow or disallow traffic based on tuples
(groups of variables like Source IP, Dest IP,
Port Number, time, etc)
10. Application Level Firewall Sometimes known as a proxy firewall.
11. Packet Filtering Firewall A limit is placed on the packets that can en-
ter the network. Compares traffic against
pre-established criteria.
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15. Packet Filtering Firewall A
type of Firewall operates at Layer 3 (the
IP Layer) and Layer 4 ( the TCP and UDP
port numbers)
16. Application Level Firewall Called application layer gateway, stateful
multilayer inspection, deep packet inspec-
tion or next-gen.
17. Stateful Inspection Firewall Tracking the source and destination port
numbers and sequence numbers as well
as the source and destination IP address-
es. Automatically creates rules to permit
traffic based on communication type.
18. Proxy Server Hides your IP address. Looks at actual
data inside packets.
19. Packet Filtering Firewalls and The types of firewalls that look at Data
Stateful Inspection Firewalls Headers.
20. Application Level Firewall You might be able to view Twit-
ter but not post to Twitter because
the
knows exactly what you should be allowed
to do.
21. Stateless Firewall Does NOT keep track of traffic flows (no
sessions). Needs 2 rules (one to reach
destination port, another to allow traffic to
2/5
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