多项选择题

Firewall filters can perform which two actions?（）

A. Log packets.
B. Set packet metrics.
C. Count packets.
D. Decrement packet's TTL value.

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单项选择题

What is the function of the helper router during a restart event in OSPF?（）

A. Sends Rapid Hellos to the restarting router.
B. Maintains Adjancency with restarting router.
C. Sends periodic DD packets to the restarting router.
D. Floods Type 9 LSAs to all routers indicating a restarting event.

单项选择题

In JUNOS software, which would prevent an OSPF router from importing the 10.0.0.4/30 summaryroute?（）

A. Import policies are not allowed for internal routes, so this is not possible.
B. Export policies are not allowed, so this is not possible.
C. Apply a firewall filter matching 10.0.0/4/30 and reject the route.
D. Apply an import policy matching 10.0.0.4/30 and reject the route.

单项选择题

A successful authentication attempt by a RADIUS server does not supply a username to the JUNOSsoftware. Which username is used by default?（）

A.root
B.local
C.radius
D.remote