单项选择题

In JUNOS software, what is the purpose of the eui-64 command?（）

A. Automatically create the IS-IS NET id.
B. Dynamically create an OSPFV3 router id
C. Automatically assign the host portion of an ipv6 address.
D. Dynamically assign a mac address to an ethernet interface.

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单项选择题

There are three IS-IS routers on a Gigabit Ethernet segment: Router A, Router B, and Router C. Each router is configured in the same area and each routers Gigabit Ethernet interface is configured for Level 1-only. Router A is the Designated Intermediate System (DIS). Each routers IP address on that segment is:
Router A: 10.1.1.1/24
Router B: 10.1.1.2/24
Router C: 10.2.2.1/26
Which statement is true about all the adjacencies that exist on that LAN?（）

A. No routers are adjacent with each other.
B. Only Router A and Router B are adjacent at Level 1.
C. Only Router A and Router B are adjacent at Level 2.
D. All three routers are adjacent with each other at Level 1.

单项选择题

In IS-IS, how long will the restart helper keep the restarting router in the up state?（）

A. until the hello dead timer expires
B. until the restart duration timer expires
C. until the restarting router sets the down bit
D. until the restart helper sends out three CSNPs

单项选择题

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

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