NETWORK SECURITY OPERATIONS|
COMPUTER SCIENCE| IT| 2026 QUIZZES
Firewalls - ANSWER-hardware, software, or both designed to prevent unauthorized
persons from accessing electronic information.
Packet Filter Firewalls - ANSWER-operates at Layers 3 and 4 of the OSI network
model: network and transport. These firewalls inspect incoming (ingress) and outgoing
(egress) traffic and compare the following attributes to a database of packet filter rules
that determine if the firewall will forward (allow) or drop (deny) the traffic:
Stateful Inspection - ANSWER-Automatically creates rules to permit traffic based on
communication type. Operates at OSI layer 3-5
Application Level - ANSWER-Operates at OSI Layer 7 and below, Analyzes packet
content and blocks program-level traffic.
IDS (Intrusion Detection System) - ANSWER-Monitors the network to detect threats.
Listens passively on the network. Alerts network admin of any detected suspicious
behavior.
IPS (Intrusion Prevention System) - ANSWER-Intercepts and blocks threats. Has many
network ports to operate as input/output pairs. Has cables routed physically through
devices to create choke points.
IDS and IPS - ANSWER-Both Identifies malicious traffic. Available as virtual and host-
based applications. Can be configured to operate in tap mode.
IDS Deployment - ANSWER-Suspicious traffic comes into the switch Intrusion system
inspects traffic and alerts admin of suspicious packets. An alarm is sent to admin's
management system.
IPS Deployment - ANSWER-Suspicious traffic comes in. An intrusion system blocks
suspicious packets before it gets to the switch.
SQL Injection Attack - ANSWER-Security solution: Leverage a reverse proxy system
and scan incoming packets for malicious behavior. OSI Layer: Application (7)
