Virtual Local Area Network (VLAN) (obj 2.2) Flashcards
(15 cards)
What is a Virtual Local Area Network (VLAN)?
A logical subdivision of a network that segments it into separate broadcast domains
VLANs group hosts together regardless of physical connections and are achieved through software rather than hardware and cabling.
What are the benefits of using VLANs?
- Flexibility in network configuration
- Efficient resource allocation and management
How do VLANs differ from traditional LANs?
VLANs reduce hardware requirements by allowing different logical networks to share the same physical hardware.
At which layer of the OSI model do VLANs operate?
Layer 2 (Data Link Layer)
What does a switch do with each data frame in a VLAN?
Tags each data frame with a VLAN identifier (ID) as it passes through.
What is the purpose of VLAN tags?
Used to determine the path of frames, ensuring they stay within their VLAN.
What are some reasons for using VLANs?
- Enhanced Security
- Improved Performance
- Increased Management
- Cost Efficiency
How do VLANs enhance security?
Isolate sensitive data and reduce data breach risks.
How do VLANs improve performance?
Reduce broadcast domain size and decrease unnecessary traffic.
What does increased management in VLANs allow?
Easier policy implementation and troubleshooting.
What is contained in a VLAN database?
- Identifier
- Name
- MTU size
What is the purpose of the VLAN.DAT file in a Cisco Switch?
Ensures consistent VLAN configurations and easy deployment across the network.
What is a Switch Virtual Interface (SVI)?
Virtual interface on a switch providing Layer 3 processing for VLANs.
What advantage does an SVI provide?
Allows routing between VLANs without the need for a separate router.
Fill in the blank: VLANs enhance network efficiency by minimizing additional _______.
routing devices
