Which two MBGP IPv4 sub-AFIs does the JUNOS software support?（）

单项选择题Which routers must be configured with the same authentication string when configuring OSPFauthentication?（）

A. all routers on a link
B. all routers in an area
C. all external OSPF peers
D. all routers in an OSPF domain

单项选择题What is true regarding the OSPF Type 2 LSA?（）

A. The DR floods this to describe the local stub network segment.
B. The ABR floods this to describe the local stub network segment.
C. The DR floods this to describe the local transit network segment.
D. Each OSPF router floods this to describe its interfaces and metrics.
E. The DR and BDR flood this to describe the local transit network segment.

多项选择题Which two multicast groups support Auto-RP mapping and discovery?（）

A.224.0.0.39
B.224.0.1.39
C.224.0.0.40
D.224.0.1.40

单项选择题In JUNOS software, what is the default interface metric for IS-IS?（）

A.1
B.10
C.100
D.10^8/link bandwidth

多项选择题Firewall filter policers can perform which two actions?（）

A. Set the next hop.
B. Discard packets.
C. Set loss priority.
D. Sample packet content.