Cisco CCNA mock exam questions sample test – Question 260

.Which of the following is NOT a characteristic of Open Shortest Path First (OSPF)?

A. Is a Cisco-proprietary routing protocol
B. Has a default administrative distance of 110
C. Supports authentication
D. Uses cost as the default metric

Correct Answer: A

OSPF is not a Cisco-proprietary routing protocol. It is an industry standard protocol supported by a wide range of vendors. The following are characteristics of OSPF:
Uses Internet Protocol (IP) protocol 89.
Has a default administrative distance of 110.
Is an industry standard protocol (non Cisco-proprietary).
Supports Non-Broadcast Multi-Access (NBMA) networks such as frame relay, X.25, and Asynchronous Transfer Mode (ATM). The default hello interval for NBMA networks is 30
Supports point-to-point and point-to-multipoint connections.
Supports authentication.
Uses as multicast address for ALLDRouters.
Uses as multicast address for ALLSPFRouters.
Uses link-state updates and SPF calculation that provides fast convergence.
Recommended for large networks due to good scalability.
Uses cost as the default metric.
Routing Fundamentals
Compare and contrast interior and exterior routing protocols
Cisco > Articles > Cisco Certification > CCNP > Shooting Trouble with IP
Cisco > Internetworking Technology Handbook > Open Shortest Path First (OSPF)
CCNA ICND2 Official Exam Certification Guide (Cisco Press, ISBN 1-58720-181-X), Chapter 9: OSPF, pp. 347-361.