Which of the following is a key benefit of using Link Aggregation Groups (LAG) in a data center?

A Link Aggregation Group (LAG) bundles multiple physical network interfaces into a single logical interface, known as an aggregated Ethernet bundle. The primary benefits of this technology are increased bandwidth and improved resiliency. The total bandwidth of the logical interface becomes the sum of the bandwidth of its member links. Additionally, a LAG provides redundancy; if one of the physical links in the bundle fails, traffic is automatically redistributed among the remaining active links, preventing a complete loss of connectivity and enhancing network availability.

A.

LAGs operate at Layer 2 and do not inherently reduce the number of Layer 3 IP addresses required for the logical interface.

B.

LAGs are a Layer 2 technology. While faster link failure detection can aid overall convergence, LAGs do not directly increase the speed of Layer 3 routing protocol calculations.

C.

LAGs can simplify the Layer 2 topology by reducing Spanning Tree Protocol complexity, but they do not directly simplify Layer 3 routing protocols like OSPF or BGP.

1. Juniper Networks Documentation. (2023). Junos OS Link Layer Discovery Protocol and Link Aggregation User Guide - Understanding Aggregated Ethernet Interfaces and Link Aggregation. "Link aggregation enables you to group Ethernet interfaces to form a single link layer interface... The aggregated Ethernet interface provides increased bandwidth and redundancy."

2. Juniper Networks Documentation. (2023). Data Center Fabric Architectures Feature Guide - Link Aggregation. "Link aggregation has two main benefits: increased bandwidth and improved resilience... If one of the links in the group fails

the LAG dynamically redistributes the traffic among the remaining links."

3. IEEE Standards Association. (2018). IEEE Standard for Ethernet

802.3-2018. Section 6

Clause 43

"Link Aggregation". This standard defines the protocol for combining multiple physical links into a single logical link to increase bandwidth and provide redundancy.