ACP ACP Network Infrastructure & Design 2 — Questions and Answers
Question 1: What is the purpose of OSPF in an Aruba campus network?
- To authenticate network devices using certificates
- To provide dynamic interior gateway routing between network segments (Correct answer)
- To assign IP addresses to clients via DHCP
- To encrypt traffic between access and distribution switches
Correct answer: To provide dynamic interior gateway routing between network segments
OSPF (Open Shortest Path First) is a link-state IGP used in Aruba networks to dynamically calculate optimal routing paths and provide fast convergence.
Question 2: What is the purpose of Spanning Tree Protocol (STP) in switched networks?
- To balance traffic load across multiple uplinks simultaneously
- To prevent Layer 2 loops by blocking redundant paths in a switched network (Correct answer)
- To encrypt broadcast traffic between switches
- To segment multicast traffic in a campus LAN
Correct answer: To prevent Layer 2 loops by blocking redundant paths in a switched network
STP prevents Layer 2 broadcast storms by detecting redundant paths in switched networks and placing redundant ports in a blocking state.
Question 3: What is ECMP, and how does it benefit Aruba network designs?
- Encrypted Control Message Protocol — it secures management traffic
- Equal Cost Multi-Path — it load-balances traffic across multiple equal-cost routes simultaneously (Correct answer)
- Extended Campus Management Platform — it unifies device management
- Edge Content Management Protocol — it caches web content at the network edge
Correct answer: Equal Cost Multi-Path — it load-balances traffic across multiple equal-cost routes simultaneously
ECMP (Equal Cost Multi-Path) allows routers to distribute traffic across multiple paths with identical routing costs, increasing throughput and providing redundancy.
Question 4: What is the role of VRF (Virtual Routing and Forwarding) in Aruba network segmentation?
- To create separate virtual routing tables on a single physical device, isolating traffic between segments (Correct answer)
- To forward traffic between VLANs without requiring a Layer 3 switch
- To encrypt routing updates between OSPF neighbors
- To replicate routing tables across VSX switch pairs
Correct answer: To create separate virtual routing tables on a single physical device, isolating traffic between segments
VRF creates multiple independent routing table instances on a single router or Layer 3 switch, enabling traffic isolation without requiring separate physical hardware.
Question 5: In an Aruba data center fabric design, what is the role of leaf switches?
- They form the high-speed backbone that interconnects all spine switches
- They connect servers and endpoints, upinking to spine switches in a leaf-spine topology (Correct answer)
- They provide WAN connectivity to remote branch offices
- They run the SDN controller software for the entire fabric
Correct answer: They connect servers and endpoints, upinking to spine switches in a leaf-spine topology
In a leaf-spine topology, leaf switches connect directly to servers and endpoints, while all leaf switches uplink to every spine switch for uniform latency.
Question 6: What is the purpose of BGP in an enterprise Aruba network connecting to multiple ISPs?
- BGP is used for internal campus routing between access and distribution layers
- BGP enables dynamic exchange of routing information between the enterprise edge and external ISP networks (Correct answer)
- BGP encrypts all traffic leaving the enterprise perimeter
- BGP manages DHCP address pools for enterprise subnets
Correct answer: BGP enables dynamic exchange of routing information between the enterprise edge and external ISP networks
BGP (Border Gateway Protocol) is the standard exterior gateway protocol used to exchange routing information between enterprise edge routers and ISP autonomous systems.
ACP ACP Network Infrastructure & Design 2
What is the purpose of OSPF in an Aruba campus network?