单项选择题

What is the function performed by LSA Type 1？（）

A.Create virtual links.
B.Advertise external prefixed.
C.Summarize routes between areas.
D.Advertise a router’s interfaces and metrics.

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多项选择题

Which three authentication options does OSPF support？（）

A.DES
B.MD5
C.Kerberos
D.Unauthenticated
E.Simple password

单项选择题

Routers A and B have an OC12c and a GE link between them and are running OSPF over both of these links.Which item is correct， assuming the default JUNOS software OSPF metric calculation？（）

A.There are two equal cost paths between A and B
B.The GE link is the preferred path between A and B
C.The OC12c link is the preferred path between A and B
D.Manual metric assignment must be configured to determine the outcome.

多项选择题

You want to limit the number of Type 7 LSAs to be converted into Type 5 LSAs at an appropriate ARB. Which two commands should you use from the [edit] hierarchy level within the JUNOS software configuration mode？（）

A.set protocols ospf area-range network/mask-length
B.set protocols ospf area area-id nssa area-range network/mask-length
C.set protocols ospf area area-id area-range network/mask-length restrict
D.set protocols ospf area area-id nssa area-range network/mask-length restrict