Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) v1.2InfrastructureEasy
A network engineer is configuring a new switch in a data center. The switch needs to support high-speed connections and aggregate multiple physical links to increase bandwidth and provide redundancy for connections to a server. Which Layer 2 technology should the engineer implement?
- ASpanning Tree Protocol (STP)
- BLink Aggregation Control Protocol (LACP)
- CDynamic Host Configuration Protocol (DHCP) Snooping
- DVLAN Trunking Protocol (VTP)
Show answer & explanationAnswer & explanation
Correct answer: B. Link Aggregation Control Protocol (LACP)
LACP is used to bundle multiple physical Ethernet links into a single logical link, providing increased bandwidth and redundancy. This directly addresses the requirement for aggregating links to increase bandwidth and provide redundancy.
Why the other options are wrong
- A. STP prevents loops in a switched network but does not aggregate links for increased bandwidth.
- C. DHCP Snooping is a security feature that prevents unauthorized DHCP servers and malicious DHCP messages.
- D. VTP is used for managing VLAN configurations across a switched network, not for link aggregation.
Link Aggregation
A technology that combines multiple network connections in parallel to increase throughput beyond what a single connection could sustain, and to provide redundancy.
- Increases bandwidth and reliability.
- Uses protocols like LACP or PAgP.
- Treats multiple physical links as one logical link.
Memory trick: LACP links, loads of lanes, less downtime.