CCNA 200-301: What provides connection redundancy, increased bandwidth, and load sharing between a wireless LAN controller and a Layer 2 switch?

Table of Contents

Question
Answer
Explanation
Reference

Question

What provides connection redundancy, increased bandwidth, and load sharing between a wireless LAN controller and a Layer 2 switch?

A. first hop redundancy
B. VLAN trunking
C. tunneling

Answer

B. VLAN trunking

Explanation

The correct answer is B. VLAN trunking.

VLAN trunking is a networking technique used to provide connection redundancy, increased bandwidth, and load sharing between a wireless LAN controller (WLC) and a Layer 2 switch.

Let’s elaborate on the functionalities of VLAN trunking and how it achieves connection redundancy, increased bandwidth, and load sharing:

B. VLAN trunking:

1. Connection Redundancy: VLAN trunking, specifically IEEE 802.1Q trunking, allows multiple VLANs to be carried over a single physical link between the WLC and the Layer 2 switch. By using VLAN trunking, you can establish multiple logical connections (VLANs) over a single physical link. This provides redundancy because if one physical link fails, the other trunk links can still carry traffic for all VLANs, ensuring connectivity and avoiding network downtime.

2. Increased Bandwidth: VLAN trunking aggregates the bandwidth of multiple physical links into a single logical link. By combining multiple links, the overall available bandwidth is increased, providing higher data throughput between the WLC and the Layer 2 switch. This is particularly useful when the wireless network experiences high traffic volumes or requires more bandwidth for data transmission.

3. Load Sharing: The concept of load sharing is closely related to increased bandwidth. By using VLAN trunking, the traffic from different VLANs can be distributed across the multiple physical links, sharing the load and balancing traffic between these links. Load sharing ensures that no single link becomes a bottleneck, optimizing the use of available bandwidth and providing an efficient data flow.

First Hop Redundancy (A) refers to providing redundancy for the default gateway, typically achieved through protocols like Hot Standby Router Protocol (HSRP), Virtual Router Redundancy Protocol (VRRP), or Gateway Load Balancing Protocol (GLBP). While it provides redundancy for the default gateway, it is not directly related to the connection between a wireless LAN controller and a Layer 2 switch.

Tunneling (C) is a technique of encapsulating one protocol within another protocol to enable secure communication over an untrusted network or to extend networks over a public or shared infrastructure. While tunneling can be used in various networking scenarios, it is not specifically related to providing connection redundancy, increased bandwidth, and load sharing between a wireless LAN controller and a Layer 2 switch.

In summary, VLAN trunking enables connection redundancy, increased bandwidth, and load sharing by aggregating multiple VLANs over a single physical link between a wireless LAN controller and a Layer 2 switch. It is a commonly used technique in wireless network deployments to ensure high availability, improved performance, and efficient traffic distribution.

Reference

Cisco Certified Network Associate CCNA 200-301 certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Cisco Certified Network Associate CCNA 200-301 exam and earn Cisco Certified Network Associate CCNA 200-301 certification.