ACA Aruba Associate Routing Protocols 1 — Questions and Answers
Question 1: What type of routing protocol is OSPF?
- Link-state routing protocol (Correct answer)
- Distance-vector routing protocol
- Path-vector routing protocol
- Static routing protocol
Correct answer: Link-state routing protocol
OSPF is a link-state routing protocol where each router builds a complete map of the network topology using link-state advertisements.
Question 2: What is the administrative distance of a static route on Aruba routers?
- 1 (Correct answer)
- 110
- 120
- 0
Correct answer: 1
Static routes have an administrative distance of 1 on Aruba routers, making them preferred over most dynamic routing protocols.
Question 3: In OSPF, what is the role of the Designated Router (DR) on a broadcast network?
- To reduce LSA flooding by acting as the central point of adjacency for all routers on the segment (Correct answer)
- To be the default gateway for all end devices
- To assign IP addresses to OSPF neighbors
- To originate external routes into the OSPF domain
Correct answer: To reduce LSA flooding by acting as the central point of adjacency for all routers on the segment
The DR reduces OSPF flooding overhead by forming adjacencies with all routers on the segment and distributing LSAs on their behalf.
Question 4: What metric does RIP use to determine the best path?
- Hop count (Correct answer)
- Bandwidth
- Delay
- Cost
Correct answer: Hop count
RIP uses hop count as its sole metric, with a maximum of 15 hops, and routes with 16 hops are considered unreachable.
Question 5: What is the purpose of a default route (0.0.0.0/0) in routing?
- To forward packets with no more-specific matching route, typically toward the internet gateway (Correct answer)
- To block all traffic with unrecognized destinations
- To advertise all connected subnets to neighbors
- To serve as a loopback address for the router
Correct answer: To forward packets with no more-specific matching route, typically toward the internet gateway
A default route matches any destination with no more-specific route in the routing table and typically points traffic toward the internet or upstream router.
Question 6: Which OSPF area must all other OSPF areas connect to?
- Area 0 (backbone area) (Correct answer)
- Area 1
- Area 100
- Area 255
Correct answer: Area 0 (backbone area)
All OSPF areas must connect to Area 0, the backbone area, either directly or through a virtual link to ensure proper LSA flooding.
ACA Aruba Associate Routing Protocols 1
What type of routing protocol is OSPF?