Given the regular expression: 64900 . (65400-65410) Which AS Path matches the given regularexpression?（）

A、64900 65000 65500

B、64900 65402 65409

C、64900 65000 65300 65410

D、64900 65402 65405 65409

Firewall filters can perform which two actions?（）

Log packets.

Set packet metrics.

Count packets.

Decrement packet's TTL value.

Identify two correct options regarding subscription processing.（） (Choose two.)

processes user response

processes function activities

passes information to Notification Mailer

sends event information to a workflow process

include the task of executing custom code on the event information

一台计算机具有比较高的可用性，其含义（）

A、它的MTBF比较低、MTTR比较高

B、它的MTBF比较高、MTTR比较低

C、它的MTBF比较低、MTTR比较低

D、它的MTBF比较高、MTTR比较高

Small in-ceiling speakers are BEST suited for（）

A、loud， bass intensive music （e.g. heavy metal， rock）.

B、providing a sub-woofer for great bass reproduction.

C、background music and blending in with decor.

D、the user who wants perfect sound reproduction.

A service provider is assigning a /30 subnet to each ATM PVC in a Routed 1483 environment. What is a consequence of this configuration？ （）

A、It burns up IP addresses.

B、It conserves IP addresses.

C、It results in a smaller routing table.

D、The group of PVCs is treated as a large LAN.