Cisco CCNA (200-301)Network AccessMedium
A network technician is configuring VLAN 100 on a Cisco Catalyst switch. The technician executes the command `switch(config)# vlan 100` and then `switch(config-vlan)# name DATA`. Which of the following is the next logical step to make VLAN 100 functional for end devices?
- AAssign switch ports to VLAN 100.
- BConfigure a DHCP server for VLAN 100.
- CConfigure a Layer 3 interface for VLAN 100.
- DAssign an IP address to VLAN 100.
Show answer & explanationAnswer & explanation
Correct answer: A. Assign switch ports to VLAN 100.
After creating a VLAN, the next essential step to make it functional for end devices is to assign specific switch access ports to that VLAN. Without ports assigned, no end device can become a member of VLAN 100.
Why the other options are wrong
- B. A DHCP server is for IP address assignment, but end devices first need to be physically connected and logically assigned to the VLAN.
- C. Layer 3 interface (SVI) is for inter-VLAN routing, not for making the VLAN functional for *end devices* to connect to.
- D. Assigning an IP address to the SVI (VLAN interface) is for routing, not for initial end device connectivity.
VLAN Configuration Steps
The sequence of commands and actions required to create and implement Virtual Local Area Networks (VLANs) on Cisco switches.
- VLANs logically segment a network at Layer 2.
- Ports must be assigned to VLANs to allow end devices to join.
- Inter-VLAN routing requires a Layer 3 device (router or Layer 3 switch).
Memory trick: Create, Name, Assign, Route!