CISCO 300-510 Exam Question 40

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What are two differences between OSPF and IS-IS? (Choose two.)
A. Unlike IS-IS routers, an OSPF router belongs to only one area in addition to the backbone area
B. OSPF uses a router ID to identify a router, and IS-IS uses a system ID
C. OSPF is a link-state routing protocol, and IS-IS is a distance-vector routing protocol
D. Unlike OSPF, IS-IS supports virtual links
E. OSPF elects a DR and BDR, and IS-IS elects a DIS
Correct Answer: BE