Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
What is the primary purpose of a 'firewall' in a computing environment?
To increase internet speed
To monitor and control incoming/outgoing network traffic
To physically cool the processor
To compress large data files
To monitor and control incoming/outgoing network traffic
A firewall is a network security system that establishes a barrier between a trusted internal network and untrusted external networks, such as the internet. It acts as a gatekeeper by monitoring and filtering incoming and outgoing network traffic based on an organization's pre-defined security policies.
ISO/IEC 27001
A firewall is a network security system that establishes a barrier between a trusted internal network and untrusted external networks, such as the internet. It acts as a gatekeeper by monitoring and filtering incoming and outgoing network traffic based on an organization's pre-defined security policies.
PinтАЛ┬а(allow)=тИСRulesтИйHeaderMatch
Throughput=Total┬аTimeTotal┬аBits┬аTransferredтАЛ
Firewalls operate by inspecting data packets passing through network interfaces. By examining the packet header informationтАФsuch as source/destination IP addresses, protocol types, and port numbersтАФthe firewall determines whether to allow or block the traffic according to the configured Access Control List (ACL). Advanced Next-Generation Firewalls (NGFW) also perform Deep Packet Inspection (DPI) to analyze the actual data payload for malicious patterns.
Firewalls can be hardware-based, software-based, or a combination of both.
Stateful inspection is a common technique where the firewall tracks the state of active connections to prevent unauthorized access.
Firewalls operate primarily at the Network layer (Layer 3) and Transport layer (Layer 4) of the OSI model.
They are essential for mitigating threats like unauthorized remote access and certain types of Denial of Service (DoS) attacks.
Provides a critical layer of defense-in-depth security.
Allows granular control over network traffic per application or service.
Can introduce latency due to packet inspection overhead.
Complex rule sets can lead to misconfigurations and security vulnerabilities.
Protecting corporate internal networks from external threats.
Securing home networks via built-in router firewalls.
Protecting cloud-based infrastructure environments.
Option A is incorrect as firewalls can potentially decrease internet speed due to inspection overhead, not increase it.
Option C refers to hardware cooling systems like fans or liquid cooling, not network security appliances.
Option D describes file compression utilities (e.g., ZIP, GZIP), which have no function in network traffic filtering.
B is correct тАФ A firewall is a network security device specifically designed to monitor and filter incoming and outgoing network traffic based on established security rules.
Always remember that a firewall is not a substitute for antivirus software; while a firewall controls traffic access, antivirus software scans for malicious code within files.