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What does MAC in MAC filtering stand for?
a. Media Access Control
b. Memory Access Control
c. Manual Address Configuration
d. Mobile Access Channel
Answer: a. Media Access Controlsanfoundry+2
At which layer of the OSI model is MAC filtering typically implemented?
a. Network Layer
b. Physical Layer
c. Data Link Layer
d. Application Layer
Answer: c. Data Link Layersanfoundry+1
What is the primary purpose of MAC filtering in networking?
a. Encrypting data
b. Limiting access based on device hardware address
c. Boosting bandwidth
d. Assigning IP addresses
Answer: b. Limiting access based on device hardware addressscaler+2
Which of the following best describes a MAC address?
a. IP assigned by DHCP
b. User-created identifier
c. Unique hardware identifier assigned to a network interface
d. Password used for Wi-Fi authentication
Answer: c. Unique hardware identifier assigned to a network interfacegeeksforgeeks+2
What type of list allows only specified devices to access a network with MAC filtering?
a. Blacklist
b. Guest list
c. Allowlist (Whitelist)
d. Banlist
Answer: c. Allowlist (Whitelist)whatismyip+2
Which list denies network access to specified MAC addresses?
a. Allowlist
b. Blacklist
c. Trustlist
d. Acceptlist
Answer: b. Blacklistminiorange+3
On most routers, where can the MAC filtering feature be enabled?
a. Firmware update page
b. Device settings
c. Security or Access Control section
d. User profile tab
Answer: c. Security or Access Control sectionscalefusion+1
What happens if a device is present on both the allowed and denied lists?
a. List is ignored
b. Access is randomly allowed
c. Access is denied
d. Device receives a warning
Answer: c. Access is deniedscaler
Which statement about MAC filtering is TRUE?
a. It completely prevents all unauthorized access
b. It can be easily bypassed using MAC spoofing
c. It encrypts wireless data
d. It prevents physical theft of devices
Answer: b. It can be easily bypassed using MAC spoofingwikipedia+2
When would MAC filtering most effectively enhance security?
a. Large public networks
b. Dynamic networks with many guest devices
c. Small, isolated networks with low device turnover
d. Mobile cellular networks
Answer: c. Small, isolated networks with low device turnovergeeksforgeeks+1
What is the key limitation of using MAC filtering alone for Wi-Fi security?
a. Does not support IPv6
b. Adds too much bandwidth
c. Provides no encryption
d. Is not compatible with smartphones
Answer: c. Provides no encryptionwhatismyip+1
Which is NOT a step in configuring MAC filtering?
a. Logging into the router console
b. Entering MAC addresses of devices
c. Enabling DHCP lease denial
d. Upgrading Ethernet cables
Answer: d. Upgrading Ethernet cablesscaler+1
What is a benefit of MAC filtering?
a. Easy to manage on large networks
b. Hides device MAC addresses
c. Reduces network congestion by restricting devices
d. Speeds up all devices unconditionally
Answer: c. Reduces network congestion by restricting deviceslogixconsulting+1
Which device typically supports MAC filtering?
a. Printers
b. Switches
c. Wireless access points
d. Both b and c
Answer: d. Both b and ccisco+2
What is MAC address spoofing?
a. Encrypting a MAC address
b. Changing a device’s MAC address to imitate another
c. Blocking all MAC addresses
d. Upgrading MAC filtering firmware
Answer: b. Changing a device’s MAC address to imitate anotherscalefusion+2
Which advantage does MAC filtering provide for home Wi-Fi?
a. Prevents guests from joining without admin approval
b. Replaces the need for WPA2/WPA3 encryption
c. Enhances throughput speed
d. Eliminates IP conflicts automatically
Answer: a. Prevents guests from joining without admin approvalwhatismyip+1
Why is MAC filtering considered insufficient alone for enterprise security?
a. Complex to configure
b. Easy to automate
c. MAC addresses can be easily spoofed and lack encryption
d. No compatible hardware
Answer: c. MAC addresses can be easily spoofed and lack encryptionwikipedia+2
What type of access control does MAC filtering provide?
a. Role-based
b. Token-based
c. Device-based
d. File-based
Answer: c. Device-basedgeeksforgeeks+1
Which of the following best describes whitelist mode in MAC filtering?
a. All devices except those listed are allowed
b. Only listed MAC addresses are allowed to connect
c. Only listed MAC addresses are denied access
d. No devices can connect
Answer: b. Only listed MAC addresses are allowed to connectcisco+2
What does a wireless network with MAC filtering but no password rely on?
a. Encryption for all traffic
b. Device hardware addresses for management
c. VPN tunneling
d. Certificate-based login
Answer: b. Device hardware addresses for managementwhatismyip+1
Which is NOT an application of MAC filtering?
a. Network access control for IoT devices
b. Filtering spam emails by content
c. Enforcing BYOD policies
d. Parental control on home networks
Answer: b. Filtering spam emails by contentgeeksforgeeks
Which is a disadvantage of MAC filtering on growing organizations’ wireless LANs?
a. Provides detailed device tracking
b. Manual entry and maintenance becomes unmanageable at scale
c. Provides robust encryption
d. Frees up network resources for all
Answer: b. Manual entry and maintenance becomes unmanageable at scalelogixconsulting+2
What protocol is typically used to assign an IP address after a device passes MAC filtering?
a. ARP
b. DHCP
c. DNS
d. ICMP
Answer: b. DHCPblogs.manageengine+1
What does MAC filtering do when a device’s MAC address is NOT on any list?
a. Grants limited access
b. Blocks all access
c. Offers guest-only access
d. Fallbacks to password authentication
Answer: b. Blocks all accesscisco+2
What type of network access control method is MAC filtering?
a. Mandatory access control
b. Discretionary access control
c. Role-based access control
d. Label-based access control
Answer: a. Mandatory access controlwikipedia+1
What format do MAC addresses typically use?
a. Hexadecimal (e.g., 00:1A:2B:3C:4D:5E)
b. Binary only (e.g., 101011)
c. Decimal (e.g., 123456789)
d. Octal (e.g., 0777)
Answer: a. Hexadecimal (e.g., 00:1A:2B:3C:4D:5E)sanfoundry+1
How many bits is a standard MAC address?
a. 16
b. 32
c. 48
d. 128
Answer: c. 48sanfoundry+1
Who assigns MAC addresses to devices?
a. End-user
b. Internet Service Provider
c. Device manufacturer
d. Router firmware
Answer: c. Device manufacturersanfoundry+1
What happens when two devices on the same network have identical MAC addresses?
a. Only one can access the network
b. The network ignores both devices
c. Security is increased
d. Router automatically renames one device
Answer: a. Only one can access the networksanfoundry
Which of the following can MAC filtering help prevent?
a. Unwanted or unrecognized devices accessing the network
b. All malware attacks
c. Device hardware failures
d. Physical theft of computers
Answer: a. Unwanted or unrecognized devices accessing the networkminiorange+2
What is a practical use of MAC filtering in schools?
a. Filtering inappropriate web content
b. Allowing only authorized student devices on Wi-Fi
c. Prioritizing traffic for teachers
d. Blocking pop-ups in browsers
Answer: b. Allowing only authorized student devices on Wi-Fiwhatismyip+1
On a guest Wi-Fi network, what’s a downside of relying solely on MAC filtering for security?
a. Guests require complex drivers
b. It prevents access to all guests
c. MAC addresses of guest devices must be entered manually
d. Guest devices are auto-approved
Answer: c. MAC addresses of guest devices must be entered manuallyscalefusion
In which router section would an admin typically find the option to disable MAC filtering?
a. Maintenance logs
b. LAN interface settings
c. Advanced > Security > Access Control
d. DNS settings
Answer: c. Advanced > Security > Access Controlsc1.checkpoint+1
What is a key attack vector against MAC filtering?
a. Port scanning
b. MAC spoofing through packet analyzers
c. Brute-force wireless password guessing
d. WPA2 handshake replay
Answer: b. MAC spoofing through packet analyzersscalefusion+2
Why is MAC filtering sometimes described as “security through obscurity”?
a. It’s based on certificate trust
b. Its effectiveness relies on implementation secrecy, not technical strength
c. It always uses hidden SSIDs
d. It encrypts device traffic by default
Answer: b. Its effectiveness relies on implementation secrecy, not technical strengthwikipedia
Which is a valid reason to use MAC filtering in an IoT deployment?
a. Ensures encryption of IoT data
b. Allows only registered IoT devices on the network
c. Gives priority to IoT traffic
d. Upgrades device firmware remotely
Answer: b. Allows only registered IoT devices on the networkminiorange+1
Which configuration option is NOT found in a MAC filtering setup?
a. Allow only the following MAC addresses
b. Block the following MAC addresses
c. Encrypt all MAC addresses
d. Disable MAC filtering
Answer: c. Encrypt all MAC addressessc1.checkpoint+2
What happens when “blocklist” mode is enabled in MAC filtering?
a. Only devices on the blocklist are allowed access
b. Devices on the blocklist are denied access to the network
c. All devices are blocked
d. Access is granted only at specific times
Answer: b. Devices on the blocklist are denied access to the networkscaler+2
Why should admins not solely rely on MAC filtering in workplaces?
a. It is cumbersome to maintain at scale and easy to defeat via spoofing
b. It is too expensive
c. It consumes excess bandwidth
d. It increases power consumption
Answer: a. It is cumbersome to maintain at scale and easy to defeat via spoofingscalefusion+1
What is the role of MAC filtering during a DHCP request?
a. It bypasses device authentication
b. It verifies device MAC addresses before granting IP leases
c. It encrypts DHCP packets
d. It increases DHCP speed
Answer: b. It verifies device MAC addresses before granting IP leasesblogs.manageengine
In MAC filtering, what does the blocklist do?
a. Disables router encryption
b. Lists devices allowed to access the network
c. Lists devices denied network access
d. Hides router SSID
Answer: c. Lists devices denied network accesscisco+1
How are MAC addresses usually represented?
a. Six pairs of hexadecimal digits separated by colons or hyphens
b. Four decimal digits separated by dots
c. Eight binary digits
d. Alphabetical codes
Answer: a. Six pairs of hexadecimal digits separated by colons or hyphenssanfoundry+1
Who is responsible for maintaining MAC address filtering lists on a network?
a. Device manufacturer
b. Network administrator
c. Internet user
d. End-user device OS
Answer: b. Network administratorblogs.manageengine+1
What setting is commonly used on guest networks to ease access for temporary users instead of strict MAC filtering?
a. Captive portal or guest Wi-Fi SSID
b. Static DNS reservation
c. Permanent blocklist
d. Device firmware rollback
Answer: a. Captive portal or guest Wi-Fi SSIDgeeksforgeeks+1
What information does an administrator need to add a device to a MAC filtering list?
a. Device model number
b. Device MAC address
c. Device IP address
d. Device nickname
Answer: b. Device MAC addressminiorange+2
Which is NOT an advantage of MAC filtering?
a. Easy identification of devices
b. Prevents bandwidth theft
c. Provides robust encryption
d. Simple setup process
Answer: c. Provides robust encryptionwhatismyip+1
Which best practice is recommended when configuring MAC filtering?
a. Use as the only line of defense
b. Combine with WPA2/WPA3 encryption
c. Only allow blocklist mode
d. Publicly display the lists
Answer: b. Combine with WPA2/WPA3 encryptionscalefusion+1
Why is MAC filtering more effective in a lab or test setting?
a. Device turnover is low and lists are easier to maintain
b. It provides zero trust
c. It is cloud-based only
d. All devices are auto-approved
Answer: a. Device turnover is low and lists are easier to maintaingeeksforgeeks+1
What is one effect of MAC filtering on network maintenance?
a. Reduces monitoring needs entirely
b. Requires continuous list updates for new and removed devices
c. Automates all device authentication
d. Encrypts all admin passwords
Answer: b. Requires continuous list updates for new and removed deviceslogixconsulting+1
Which security feature may be used alongside MAC filtering for better protection?
a. WPA2 or WPA3 wireless encryption
b. Network Time Protocol
c. IPv6 tunneling
d. Ledger-based access
Answer: a. WPA2 or WPA3 wireless encryptionwhatismyip+1

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