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VLAN stands for:
a. Virtual Local Area Network
b. Variable Link Access Network
c. Visual LAN Access Node
d. Virtual LAN Adapter Network
Answer: a. Virtual Local Area Networksanfoundry
What is the main purpose of creating VLANs?
a. To combine different networks
b. To logically segment a network for security and performance
c. To reduce switch bandwidth
d. To connect routers together
Answer: b. To logically segment a network for security and performancecheckpoint
VLAN segmentation helps improve security by:
a. Allowing attackers into multiple zones
b. Isolating network traffic between groups
c. Sharing all traffic on one subnet
d. Encrypting wireless data
Answer: b. Isolating network traffic between groupsinfosecinstitute+1
VLANs function at which OSI layer?
a. Layer 1
b. Layer 2
c. Layer 3
d. Layer 4
Answer: b. Layer 2sanfoundry
VLAN IDs range from:
a. 0-100
b. 1-4094
c. 100-9000
d. 10-9999
Answer: b. 1-4094sanfoundry
Default VLAN on a Cisco switch is:
a. VLAN 0
b. VLAN 1
c. VLAN 10
d. VLAN 99
Answer: b. VLAN 1sanfoundry
Frames without VLAN tags belong to which VLAN?
a. Trunk VLAN
b. Native VLAN
c. Administrative VLAN
d. Guest VLAN
Answer: b. Native VLANsanfoundry
VLAN trunking uses which IEEE standard?
a. 802.3
b. 802.11
c. 802.1Q
d. 802.15.4
Answer: c. 802.1Qmeraki
VLAN trunking allows:
a. A single port to carry multiple VLANs
b. Blocking all broadcasts
c. Encrypting VLAN data
d. Routing between subnets
Answer: a. A single port to carry multiple VLANsjumpcloud+1
In cybersecurity, VLANs help:
a. Increase attack surfaces
b. Limit broadcast domains and contain threats
c. Merge insecure networks
d. Replace firewalls
Answer: b. Limit broadcast domains and contain threatsinfosecinstitute+1
Inter-VLAN communication is possible using:
a. Repeater
b. Router or Layer 3 switch
c. Bridge
d. Hub
Answer: b. Router or Layer 3 switchsanfoundry
VLAN hopping is a type of:
a. Authentication protocol
b. Network attack exploiting VLAN misconfigurations
c. Routing technique
d. Encryption failure
Answer: b. Network attack exploiting VLAN misconfigurationswikipedia+1
VLAN hopping often exploits:
a. SSID misconfiguration
b. Native VLANs on trunk ports
c. IP tunneling
d. ARP blocking
Answer: b. Native VLANs on trunk portszenarmor+1
A double-tagging attack involves:
a. Two routers encrypting data
b. Two VLAN tags on a frame
c. Two IP addresses per host
d. Two physical switches
Answer: b. Two VLAN tags on a framezenarmor
VLANs are primarily configured on:
a. Routers
b. Switches
c. Firewalls
d. Access points
Answer: b. Switchescheckpoint
The benefit of VLAN segmentation includes:
a. Larger broadcast domains
b. Reduced traffic scope
c. Increased attack spread
d. Slower performance
Answer: b. Reduced traffic scopeinfosecinstitute+1
VLAN tagging adds a header of:
a. 8 bytes
b. 6 bytes
c. 4 bytes
d. 2 bytes
Answer: c. 4 bytesnetworkwalks
To mitigate VLAN attacks, administrators should:
a. Keep native VLAN as default
b. Use an unused VLAN for native VLAN
c. Disable VLAN tagging
d. Increase VLAN ID range
Answer: b. Use an unused VLAN for native VLANwikipedia+1
VLAN 100 is often used for:
a. Administration
b. Guest traffic isolation
c. Backup management
d. DHCP negotiation
Answer: b. Guest traffic isolationscribd
Voice VLANs are designed for:
a. Web traffic
b. Email data
c. Prioritizing VoIP packets
d. Backup synchronization
Answer: c. Prioritizing VoIP packetsscribd
VLAN stacking allows:
a. More devices in one VLAN
b. Nested VLANs for flexibility
c. Blocking unknown traffic
d. Automatic trunking
Answer: b. Nested VLANs for flexibilityscribd
Security challenge of VLANs arises when:
a. VLAN IDs are unique
b. Switches are misconfigured
c. VLAN database is encrypted
d. Users have 802.1x enabled
Answer: b. Switches are misconfiguredzenarmor+1
VLAN membership can be based on:
a. Port, MAC address, or protocol
b. IP subnet
c. User authentication only
d. VLAN stacking
Answer: a. Port, MAC address, or protocolsanfoundry
VLANs improve manageability by:
a. Centralizing broadcast storms
b. Logical grouping of devices by function
c. Removing switch dependencies
d. Creating physical isolation
Answer: b. Logical grouping of devices by functioncheckpoint
VLAN tagging operates at which layer?
a. Layer 2 – Data Link
b. Layer 3 – Network
c. Layer 4 – Transport
d. Layer 5 – Session
Answer: a. Layer 2 – Data Linkmeraki
How does VLAN segmentation enhance Zero Trust models?
a. By broadcasting all VLAN traffic
b. By limiting access via subnets
c. By disabling encryption
d. By duplicating switchports
Answer: b. By limiting access via subnetsesecurityplanet
VLANs can limit packet sniffing by:
a. Encrypting IP headers
b. Restricting visibility to specific VLANs
c. Hiding MAC tables
d. Blocking USB devices
Answer: b. Restricting visibility to specific VLANsinfosecinstitute
To connect VLANs in a trunk, switches use:
a. Bridge protocol
b. Encapsulation tags
c. VLAN gateways
d. IPsec tunnels
Answer: b. Encapsulation tagsmeraki
Dynamic VLAN assignment can be implemented with:
a. RADIUS and 802.1X
b. DNS zone transfers
c. GRE tunneling
d. TCP optimization
Answer: a. RADIUS and 802.1Xinfosecinstitute
VLANs and subnets differ as VLANs work at:
a. Data link layer
b. Application layer
c. Network layer
d. Presentation layer
Answer: a. Data link layercheckpoint
VLAN pruning reduces:
a. Broadcast traffic across trunks
b. VLAN IDs in use
c. Authentication time
d. Packet encryption
Answer: a. Broadcast traffic across trunksscribd
VLANs are part of which Cisco design model?
a. Core layer
b. Distribution layer
c. Application layer
d. Interface layer
Answer: b. Distribution layercheckpoint
VLANs can span across:
a. Single switch only
b. Multiple switches via trunks
c. Only routers
d. Virtual machines only
Answer: b. Multiple switches via trunksjumpcloud+1
Management VLAN is primarily used for:
a. User traffic
b. Configuring switches securely
c. Inter-VLAN routing
d. DHCP broadcasting
Answer: b. Configuring switches securelysanfoundry
Which VLAN attack manipulates switch tables?
a. VLAN hopping
b. ARP poisoning
c. Double encryption
d. IP flooding
Answer: a. VLAN hoppingwikipedia+1
VLAN access ports belong to:
a. One VLAN
b. Multiple VLANs
c. Three VLANs
d. No VLANs
Answer: a. One VLANnetworkwalks
Native VLAN should be:
a. VLAN 1
b. Isolated and unused
c. Same as management VLAN
d. Always encrypted
Answer: b. Isolated and unusedwikipedia+1
Voice VLAN prioritizes packets using:
a. QoS
b. DNS
c. ICMP
d. TCP flags
Answer: a. QoSscribd
VLAN bridging connects:
a. Multiple broadcast domains
b. Subnets to Internet
c. Routers to switches only
d. Wireless access points
Answer: a. Multiple broadcast domainscheckpoint
What is the major drawback of VLAN?
a. Increased complexity in configuration
b. Increased collision domains
c. Lack of segmentation
d. Reduced security
Answer: a. Increased complexity in configurationsanfoundry
VLAN security best practices recommend:
a. Keeping VLAN 1 active for all traffic
b. Disabling unused ports and native VLANs
c. Allowing VLAN overlap
d. Configuring multiple management VLANs
Answer: b. Disabling unused ports and native VLANszenarmor+1
VLANs are often combined with:
a. Firewalls and ACLs for segmentation
b. DNS servers for routing
c. DHCP relays for VLAN IDs
d. Hubs for speed
Answer: a. Firewalls and ACLs for segmentationcheckpoint
The encapsulation protocol for VLAN tagging is:
a. MPLS
b. 802.1Q
c. GRE
d. PPPoE
Answer: b. 802.1Qmeraki
VLAN IDs 1002-1005 are reserved for:
a. Default system VLANs
b. Token Ring and FDDI VLANs
c. IP multicast
d. VoIP VLANs
Answer: b. Token Ring and FDDI VLANssanfoundry
VLAN tag hopping can be mitigated by:
a. Explicit tagging on trunk ports
b. Increasing VLAN ID range
c. Using access ports only
d. Removing native VLAN tags
Answer: a. Explicit tagging on trunk portswikipedia
VLANs provide logical segmentation but not:
a. Physical isolation
b. Network scalability
c. Traffic control
d. Security boundaries
Answer: a. Physical isolationcheckpoint
VLAN configuration database is stored in:
a. Switch flash memory
b. Router NVRAM
c. DHCP server
d. Firewall log
Answer: a. Switch flash memoryscribd
VLANs can be dynamically assigned based on:
a. User roles via authentication
b. IP address range
c. Device uptime
d. Port speed
Answer: a. User roles via authenticationinfosecinstitute
VLAN tag fields reside within:
a. Ethernet frame header
b. IP packet payload
c. TCP segment
d. SNMP trap
Answer: a. Ethernet frame headermeraki
The main function of VLANs in cybersecurity is to:
a. Increase MAC flooding
b. Enforce segmentation and contain breaches
c. Enable broadcast looping
d. Replace encryption systems
Answer: b. Enforce segmentation and contain breachesinfosecinstitute+1

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