多項(xiàng)選擇題

What information does a router running a link-state protocol use to build and maintain its topological database?（）

A. hello packets
B. SAP messages sent by other routers
C. LSAs from other routers
D. beacons received on point-to-point links
E. routing tables received from other link-state routers
F. TTL packets from designated routers

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多項(xiàng)選擇題

OSPF routing uses the concept of areas. What are the characteristics of OSPF areas?（）

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.

多項(xiàng)選擇題

Which are valid modes for a switch port used as a VLAN trunk?（）

A.transparent
B.auto
C.on
D.desirable
E.blocking
F.forwarding

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