What are the characteristics of OSPF areas?

OSPF routing uses the concept of areas.

What are the characteristics of OSPF areas? (Choose Three.)
A . Each OSPF area requires a loopback interface to be configured.
B . Areas may be assigned any number from 0 to 65535.
C . Area 0 is called the backbone area.
D . Hierarchical OSPF networks do not require multiple areas.
E . Multiple OSPF areas must connect to area 0.
F . Single area OSPF networks must be configured in area 1.

View Answer

Answer: BCE

Explanation:

Definition of OSPF areas: An OSPF network may be structured, or subdivided, into routing areas to simplify administration and optimize traffic and resource utilization. Areas are identified by 32- bit numbers, expressed either simply in decimal, or often in octet-based dot-decimal notation, familiar from IPv4 address notation.

See discussion following Cisco Learning discussion. https://learningnetwork.cisco.com/message/90832